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Decode in where clause oracle Is it the right behavior and is it Jun 1, 2011 · Hi all We can use decode function in the Select columns as well as Group by Columns as well as Having Clause Can we use decode function in the where clause also. Is there function or another approach though which I can achieve this functionality. g. Decode helps to perform IF-THEN-ELSE logic in the SQL query. Finally, I will provide code for the equivalent transformations in SQL Server, PostgreSQL, and MySQL. 2 should be written as 0. But for now pressed for time, perhaps later. ORDER_SCH_ID, 'TRAN2', TAB1. In working with an SSRS report, I'm passing in a string of states to a view. tab1 = b. Jul 9, 2008 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Jan 5, 2021 · Never use commas in the FROM clause. First the relevant rows are computed (the where clause), then the selected fields are computed (the SELECT clause) and last the rows are sorted (the order by clause). 772002 May 11 2010 — edited May 11 2010. ItemId = _itemId and TableA. DECODE only "looks" at one thing, the first argument: DECODE([the thing I'm looking at], [then the possible values]) whereas CASE could have many things to consider, CASE WHEN x=1 THEN For appeals, questions and feedback about Oracle Forums, I have to use DECODE function in where clause. status FROM employeetable t WHERE t. where (case when ass_line = '551F' then case when asl. The question is Why? Sure I've coded around the issue but I'd like to understand if this is an oracle bug or just a quirk of the DECODE function. Aug 17, 2016 · Conditional Where clause with decode Hello there,Good Day!I have a query at hand:SELECT mf_trn_id FROM mf_transactions WHERE MF_TRN_AGENT_CD = :b1 AND MF_TRN_PAN_NO = :b2 AND MF_TRN_SCH_CD = :b3 AND MF_TRN_COMP_CD = :b4 AND MF_TRN_CD = :b5 AND MF_TRN_FOLIO = Decode(:b5, 'P', mf_trn_folio, :b7) In other words, the DECODE() function never evaluates a search (si+1) when a previous search (si) equals e. attribute10)) matl_val In the above code matl_val is alias name i need to use that one in where clause as where matl_val > 0 is this possible or anyother way can anyone help me. process_id=1 and d. I will also compare DECODE() to CASE WHEN in Oracle and help you understand when to use each function. Tom Kyte has an example of this in his discussion on variable IN lists . Please give me the sample code For the record, here's another ugly way to do it. employeeid = employeerole. roleid = roledef. DECODE can check equality operators only where as CASE can support all relational operators DECODE can be used in sql only where as CASE can be used in SQL AND PL/SQL CASE is better than DECODE. Mar 7, 2012 · It seems that there is a problem with my DECODE statement since i observed that when using the DECODE function, a column is equated before the DECODE. If expr is null, then Oracle returns the result of the first search that is also null. Quantity, TableB. Id = TableD. employid, t. The DECODE function can be used in Oracle/PLSQL. salary as Dec 2, 2024 · AND (NVL (t. price_total, s. attribute2, 'STONE', 0, xfer. SQL in Oracle: Decode function not working in this scenario. roleid AND rolename IN ( CASE WHEN (1 < 2) THEN ('Owner Role') WHEN (2 < 1) THEN ('Eval Owner Role') END); Oct 13, 2010 · Hello gurus, Can we use case statements in where clause ?? Any example will be great! And also i would like to know, besides CASE and DECODE statements, Is there any way we can use IF ELSE statemen Conditional Where clause with decode Hello there,Good Day!I have a query at hand:SELECT mf_trn_id FROM mf_transactions WHERE MF_TRN_AGENT_CD = :b1 AND MF_TRN_PAN_NO = :b2 AND MF_TRN_SCH_CD = :b3 AND MF_TRN_COMP_CD = :b4 AND MF_TRN_CD = :b5 AND MF_TRN_FOLIO = Decode(:b5, 'P', mf_trn_folio, :b7) Jul 27, 2011 · i have a problem in decode clause i have 2 conditions in my code --condition 1 -- this condition in where clause where gl. It is bespoke Oracle syntax. last_name, t. I think what you wanted was this: For each entry in the array it appends a line to the WHERE clause in the format <name> = '<value>'. DECODE only "looks" at one thing, the first argument: DECODE([the thing I'm looking at], [then the possible values]) whereas CASE could have many things to consider, CASE WHEN x=1 THEN Jul 14, 2018 · Following oracle query complies and works fine: SELECT Employee. So task_id is compared with a search value one by one. Doc reference: NULLS in conditions Therefore, this one expectedly doesn't work: Jul 26, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. can not use the case when function since oracle version am using is a bit old. Maybe you were better off with the CASE . Id = TableB. employeeid AND employeerole. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Aug 28, 2020 · the not null condition on p. Sep 29, 2017 · WHERE clause is the section where you write your conditions to get your specific records from the table/s. I am not well versed in Oracle and I'm bit confused by the use of this NVL function in DECODE function Select DECODE (DECODE(NVL(tab. DISCOUNT_AMOUNT, o. Your continued use of Oracle Communities Sep 1, 2014 · let's say table 1 is named table1, my select would be: select id_number, code, start_month, qtr1, qtr2, qtr3, qtr4---the 1st 3 columns will be selected from table1 whereas the value for qtr1-4 should come from using the decode function. We had DECODE a long time before we introduced the CASE function, which is why a lot of people are more familiar with DECODE. Your continued use of Oracle Communities Nov 9, 2018 · If the resulting string is empty, then leave out the where clause entirely. col3(+)=V. Ask Question Asked 8 years, 6 months ago. tab2 Mar 6, 2020 · Note: If you have Oracle 12c or higher, you can use LIMIT instead of rownum. It treats a NULL expression and NULL search as equal (so NULL == NULL). attribute2 is null -- condition 2 --another cond Mar 19, 2013 · I have the following SQL query to be translated to LINQ. Jan 30, 2013 · Now, order by clause use an expression and order rows upon it. Modified 8 years, 6 months ago. DECODE (expression, search, result [, search, result] [, default]) Question 3: - Example of Decode Function in These changes document Community specific rules and Oracle’s content moderation practices including use of automated tools, appeals process, and Oracle’s contact details. rowid rid,c1. Repeating 'Pune' in the argument list is the cost of doing the translation you asked for. May 23, 2016 · DECODE is a subset of CASE. Many application languages have the equivalent of concat_ws()-- string concatenation with a separator (join in Python, for instance). If none of the WHEN THEN pairs meet this condition, and an ELSE clause exists, then Oracle returns else_expr. id,0),0,0,1)+ D Mar 14, 2013 · CASE might help you out: SELECT t. 0. So in table I have fields order_no, line_no, chg_order_no (revision number) and amount. Always use proper, explicit, standard, readable JOIN syntax. May 10, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Apr 10, 2012 · If user select other then "ALL"option from the LOV the following condition should be part of the where clause. So for example this: SELECT a, b FROM some_table ORDER BY 1,2 is the same as: Apr 3, 2020 · Question 1:- What is Decode in Oracle? Decode is a function in Oracle which helps to transfer your data to the another data. Specifically, it seems to be ignoring a nested Decode and just returning the default value. In this case (and all other cases where you could use decode), you can use case, which is more flexible and a more verbose so it is easier to read too. SELECT 'US MyAccount Jan 7, 2016 · Oracle runs the select query in the order below: FROM clause; WHERE clause; GROUP BY clause; HAVING clause; SELECT clause; ORDER BY clause; Based on the above, you can see that when you are in the WHERE part, the alias has not yet been created. Viewed 1k times 1 I want to use parameter in my query but I Dec 7, 2023 · This has no else clause, so returns null for values of exam_id other than 1, 2, 3, or 4. FULL_NAME) Full_name, Conditional Where clause with decode Hello there,Good Day!I have a query at hand:SELECT mf_trn_id FROM mf_transactions WHERE MF_TRN_AGENT_CD = :b1 AND MF_TRN_PAN_NO = :b2 AND MF_TRN_SCH_CD = :b3 AND MF_TRN_COMP_CD = :b4 AND MF_TRN_CD = :b5 AND MF_TRN_FOLIO = Decode(:b5, 'P', mf_trn_folio, :b7) Jan 25, 2021 · I'm trying to use max function in where clause in order to fetch the latest revision of change order. 748821 Feb 24 2010 — edited Feb 24 2010. Hot Network Questions Sep 19, 2014 · I know oracle is strict when it comes to aggregate functions but when I tried something like this in one of the subqueries, I got the ouptut as expected: SELECT DECODE(NVL(SUM(Qty1),0),0,SUM(Qty2),SUM(Qty1)) FROM test_v WHERE item_no = 1234567; But strangely when I modified it to this: May 5, 2011 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. If you need some kind of performance, you will need Oracle Text (or some external indexer). Nov 27, 2014 · After getting suggestion that using WITH clause, My approach to retrieve data through DECODE() using alternative table name is: declare cl number; cursor c is with V as ( select c1. col3, 10) cl from table2 c1) select c1. How can I do it? Apr 16, 2018 · Oracle Database searches for the first WHEN THEN pair for which expr is equal to comparison_expr and returns return_expr. Oracle supports a little syntactic shortcut, in which columns of the result set can be referred to positionally in an ORDER BY clause. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. Question 2:- Syntax of the Decode Function. release_quantity1 * xfer. Starting with 816, CASE is the standard way to achieve the same results - with more meaning (case is easier to read and understand) and is the recommended function to use. The maximum number of components in the DECODE expression, including expr, searches, results, and default, is 255. coalesce with subquery in a where clause in Oracle. ItemId TableB. Using oracle decode. CASE vs DECODE. Since we can't use decode directly in pl/sql, the plan is to use 'select decode() into variable from dual'. Apr 13, 2011 · For appeals, questions and feedback about Oracle Forums, Is it possible to have a decode in where clause as follows? SELECT * FROM table1, table2 WHERE decode Jun 4, 2013 · The case statement is the SQL standard "equivalent" to decode(). duration to the DECODE since if the value of R. But When I'm exeucting the following query as a seperate query, then I'm getting the value of DECODE block properly, but didn;t understnad why its not returning the same way when I'm putting the same DECODE statement in WHERE clause. id=emp. GRP_ID, ?) But given the use case, making the parameter NULL would be a little better. attribute1 is null and gl. Feb 7, 2011 · You want to to write code that only Oracle developers recognize and understand; You want to write code that is hard to read; You want to increase the chance of introducing bugs the next time you change the code; You want the optimizer to generate suboptimal execution plans (when used in where-clause). How do I merge the multiple If Else using decode in PL/SQL? 0. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Nov 1, 2015 · First of all, 0. The architect needs to justify what they are saying. assembly_line in ('551F', '551C', '551S') then 1 else 0 end else case when asl. Oracle doesn't know what to do with that query in the case statement (and neither do I): are you trying to test for existence? are you looking for a specific value? Also, it's silly and confusing (not to mention unnecessary, in this case) to use both case and decode in the same statement. A) Use DECODE() function to make data more meaningful. Jul 7, 2010 · CASE is a statement and DECODE is a function We can use the CASE in the where clause and can not use the DECODE in the where clause. BETWEEN is unnecessary assuming that datet is not in the future. The decode expression is similar to the case_expr (see case_expr::=). Hi all, SELECT 'US Website' v_site. cl; begin for rec in c loop dbms decode in where clause in oracle sql. Jan 29, 2020 · Don't use decode(). discount_total, s. Jan 14, 2014 · This second example using a numeric data type for the variable in the decode works properly. To get substring indexing with Oracle Text you will need a CONTEXT index. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Nov 11, 2014 · Let's look at some Oracle NVL function examples and explore how to use the NVL function in Oracle/PLSQL. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Oct 30, 2020 · I should note that the CASE solution suggest by GMB is standard SQL and works in both Postgres and Oracle (and pretty much any other database), so this is just a shortcut. 2. Aug 20, 2007 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. thats why for running the query, i have put '>' in that place. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Nov 19, 2021 · Alternately, you can have the decode return the correct data type by doing an explicit cast. If there are no matches, the value is 0; if there are matches, then the first clause is met and the return value is 1. first_name, t. SELECT o. first_name LIKE firstname Feb 8, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. – Justin Cave Jun 19, 2015 · Hi,I need to use decode condition in where clause in such a way that if the respective column is null then consider the corresponding column for eg Fee_dateFee_refund_date10-OCT-05 12-NOV-05 11-J May 11, 2010 · For appeals, questions and feedback about Oracle Forums, Decode in Where clause. The twist is that the users could also pick a selection Jun 19, 2015 · Hi,I need to use decode condition in where clause in such a way that if the respective column is null then consider the corresponding column for eg Fee_dateFee_refund_date10-OCT-05 12-NOV-05 11-J There should be no performance hit. . CLASSIFICATION_TRIP is 'T' then i should use <= else i use >. If they are really claiming that using any function anywhere in the where clause prevents an index being used, you could point out that sysdate is a function, for example. If you would like to use results from the SELECT part, you can do that by modifying your query like this: Mar 14, 2015 · Since the requirement is based on data type, you could just negate the numeric columns in your decode; if col1 is numeric and the others are text then: ORDER BY decode(in_sort_column, 'col1', -col1, 'col2', col2, 'col3', col3); But this is going to attempt to convert the text columns to numbers. The statement where I will be using this is something like:select * from v_viewname v where v. This also has one selector followed by a list of key-value pairs. I know you can use decode within a where clause, but I was wondering if there was any way you could use the value in the where clause after decoding in the selection. So leaving out the where clause does not even result in code that is much more complicated. to_date('10-01-2011', 'dd-mm-yyyy')) or (if there's no time element to your date value) using the DATE Sep 1, 2010 · You could try the months_between function. secondary_inventory_name, 'Y') IN (DECODE (:p_sub_inv_name, NULL, NVL (t. customer_number as cust_name, cr. Select statement into decode Aug 17, 2016 · Conditional Where clause with decode Hello there,Good Day!I have a query at hand:SELECT mf_trn_id FROM mf_transactions WHERE MF_TRN_AGENT_CD = :b1 AND MF_TRN_PAN_NO = :b2 AND MF_TRN_SCH_CD = :b3 AND MF_TRN_COMP_CD = :b4 AND MF_TRN_CD = :b5 AND MF_TRN_FOLIO = Decode(:b5, 'P', mf_trn_folio, :b7) Mar 2, 2011 · The decode works like this: SELECT DECODE('col1', 'x', 'result1','y','result2') resultFinal FROM table1; It possible to accomplish this in sql: SELECT * FROM (SELECT May 18, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. PROCEDURE getreport ( p_affiliates IN varchar2, p_StartDate IN date, p_EndDate IN date, p_ReturnValue OUT sys_refcursor ) IS BEGIN DECLARE sql_stmt VARCHAR2(4000); BEGIN sql_stmt := 'SELECT FIRSTNAME, LASTNAME, ADDRESSLINE, SUITE, CITY, STATE, ZIP FROM ORDERHEADER head INNER JOIN ORDERDETAIL detail on head. Oracle does not need to materialize inner queries before applying outer conditions -- Oracle will consider transforming this query internally and push the predicate down into the inner query and will do so if it is cost effective. So whenever user modifies purchase order then the system creates new change order and order_no and line_no will remain same but chg_order_no and amount changes. this is my test case CREATE TABLE tab_test (lev NUMBER, code VARCHAR2(10), val VARCHAR2(10)); INSERT INTO t Aug 20, 2007 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Id (+) and TableA. Thanks, Sanjeev. – How to use Oracle's decode function in where clause. EmployeeId, Employee. Jun 15, 2015 · You can not use alias names from the select list in the where clause, only in the order by clause. Sep 5, 2024 · What is DECODE function in SQL? In Oracle, DECODE function allows us to add procedural if-then-else logic to the query. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Feb 23, 2010 · Your confusion is understandable; but no, the values returned by the DECODE are not interpreted as column numbers. cl from table1 d,V,table2 c1 where V. Otherwise, Oracle returns null. If you object to any changes, you may request that your account be closed by contacting oracle-forums-moderators_us@oracle. this is my test case CREATE TABLE tab_test (lev NUMBER, code VARCHAR2(10), val VARCHAR2(10)); INSERT INTO t DECODE is a subset of CASE. May 23, 2008 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. like below select * from tab1,tab2 where a. The reason for this is that the SQL is processed in steps. How to make two conditions Jan 13, 2011 · The general approach in this case would be to parse the comma-separated list into an Oracle collection and to use that collection in your SQL statement. IsFrozen FROM employee, employeerole, roledef WHERE employee. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Mar 2, 2015 · Starting from Oracle 12c you could use CROSS APPLY to define expression and then you could refer to them in WHERE clause:. Note that sysdate has a time component. Id,NULL,0,1 Mar 7, 2012 · It seems that there is a problem with my DECODE statement since i observed that when using the DECODE function, a column is equated before the DECODE. 0. 1. The aggregation will always return one row. cl and c1. oracle: decode and subquery select result. Aug 2, 2011 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group . If yes can u give small sample Sur Jan 3, 2011 · DECODE (TAB2. Date >= _from_date and TableA. Database is oracle 10. Multiple values in decode Oracle SQL. It's a bit involved as it's made for indexing large documents and text using a lot of smarts. tab2 Apr 2, 2012 · For appeals, questions and feedback about Oracle Forums, I have to use DECODE function in where clause. A simple case expression is like decode. 6. Use decode in sql query. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Feb 24, 2010 · For appeals, questions and feedback about Oracle Forums, Using DECODE in WHERE clause. See the following locations table in the sample database: Jun 1, 2023 · Oracle DECODE Function with NULL Values. Oct 20, 2016 · For those who land here that actually have a need for a case statement in a where clause. Dec 4, 2006 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. You could use the DECODE function in a SQL statement as follows: SELECT supplier_name, DECODE(supplier_id, 10000, 'IBM', 10001, 'Microsoft', 10002, 'Hewlett Packard', 'Gateway') result FROM suppliers; The above DECODE statement is equivalent to the following IF-THEN-ELSE statement: Dec 7, 2023 · This has no else clause, so returns null for values of exam_id other than 1, 2, 3, or 4. Jul 10, 2009 · Hi, I'm working with Oracle9i Enterprise Edition Release 9. SELECT TableA. The existing if block is as follows: if var1 = 'a' then var2 := 'x'; elseif var1 = 'b' then var2 := 'y'; else var2 := 'z'; end if; the replacement decode could be: Oct 10, 2019 · sql statement inside decode clause. select months_between(sysdate+30, sysdate ) from dual; select months_between(sysdate+15, sysdate ) from dual; Nov 3, 2010 · hi all, I came into an issue trying to use the DECODE function in a simple where clause. if status_a='Y' and stat Dec 22, 2011 · the expression in the when clause of the case-when statement will come from UI and depending on the choice i need to make the where clause. Decode with AND clause oracle. Rajesh123 Oct 14 2016 — edited Oct 14 2016. Since time immemorial (almost), SQL has supported case expressions -- which are more flexible than decode() and available in all (real) databases. Basically, I have a case sorta like this. A simple boolean or is equivalent. Date, TableA. Dec 18, 2009 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. SUM(NVL()) is not needed, because NULL values are ignored. ) decode() is rather hard to follow. so the original query will look like this(for your reference): select cr. ITEM_ID, o. The next is that DECODE('NOINR','NOINR', (SELECT CURRENCY_CODE FROM FND_CURRENCIES WHERE CURRENCY_CODE <> 'INR', ACR. item_total FROM ORDER_ITEMS o CROSS APPLY (SELECT ITEM_PRICE*QUANTITY AS price_total, DISCOUNT_AMOUNT*QUANTITY AS discount_total, (ITEM_PRICE-DISCOUNT_AMOUNT)*QUANTITY AS item Feb 25, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. However, in this case i cannot equate the value of r. SELECT DECODE(1, 1, '''sample1'', ''sample2'', ''sample3''', Feb 27, 2019 · I see this a lot too. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Nov 1, 2010 · decode is the function Oracle originally provided with releases of the database prior to 8. secondary_inventory_name, 'Y'), :p_sub_inv_name ) ) ) This CONDITION in query is giving only the data of single parameter value from the list of p_sub_inv_name parameter values. First, I use a CTE which computes the number of records having either Success or In_progress. Hi, The requirement is like this: Mar 28, 2020 · As DECODE handles NULLs appropriately, the following should work: SELECT * FROM table1 t WHERE DECODE(:var, t. attribute10)), 'FG', (xfer. Per the docs: DECODE compares expr to each search value one by one. Total FROM TableA, TableB, TableC, TableD Where TableA. GRP_ID = DECODE(?, 0, A. DECODE(theRow, 'P', 1,'D',2,'T',3, (goes on a bit)) AS May 10, 2010 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Jun 3, 2013 · You could use something like: SELECT * FROM TABLEX WHERE COALESCE(column2, '') = COALESCE(variableY, '') (COALESCE takes the first non NULL value) Nov 21, 2013 · I have used decode like this: decode two values using oracle decode. That expression should be morphotropic(;)) So, assuming stardard oracle's employee schema, managers are: select * from emp e where exists (select emp_id from emp where e. Let’s take some examples of using the DECODE() function to see how it works. Technical questions should be asked in the appropriate category. (This does not affect performance, however. req_status If user select "ALL" from the lov no need to append the above condition in the where clause. With some more testing it becomes clearer that this is a side effect of the nulls created by the decode statments and that an explicit "order by 1 asc" leading the sort would ensure the most Apr 6, 2016 · Zero-length string is treated as null, and you cannot compare nulls through (in)equality in Oracle, as they are treated in special way. CURRENCY_CODE); is likely to return multiple rows (a value that is being selected is from a subquery). Jul 6, 2020 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. EmployeeName, Employee. Sep 12, 2005 · select * from m where col1 = case when col2 > sysdate then col2 else sysdate end / or if case doesn't work -- as you gave me NO VERSION at all -- decode Dec 13, 2017 · I was thinking of converting an if block into decode in my pl/sql function. Later, we can use this count to figure out whether we need to return a single row with the lowest version, or else all matching rows. mgr_id) An workaround query may be: Nov 3, 2010 · hi all, I came into an issue trying to use the DECODE function in a simple where clause. So, this example will return 1: SELECT DECODE(NULL, NULL, 1, 0) FROM DUAL; The CASE statement treats NULL values as Oct 23, 2007 · Hi Tom, I'd like to use a decode statement that returns multiple values instead of a single value. Jul 30, 2010 · DECODE (item. Hi all, Jul 27, 2012 · I have a oracle query and part of it is calculating some value using DECODE. Share Improve this answer Jul 17, 2020 · In a DECODE function, Oracle considers two nulls to be equivalent. Sep 21, 2018 · How to use Oracle's decode function in where clause. Nov 26, 2013 · How to use Oracle's decode function in where clause. Mar 4, 2011 · UPDATE temp SET col1 = DECODE(update_var, 1, update_value, col1), col2 = DECODE(update_var, 2, update_value, col2) Also, as a bonus, it'll handle the possible situation where the update variable is set to something other than one or two! Hi, Can i use Decode in Where clause Please Do the need full on the same. ORDERTRACKINGLOGID = detail Jan 23, 2005 · I think some problem is there in my WHERE clause. enterprise, TABLE(f_stringto The DECODE function can be used in Oracle/PLSQL. Instead of the expression above, you could use this decode logic: Sep 30, 2016 · I'm interesting that how can I use if-then-else statement or any control structure in where clause in Oracle. 1. Id, TableA. It will calculate the number of months between two dates, as a decimal number. Date < _to_date and DECODE(TableD. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Jul 11, 2005 · Hello, We are experiencing an issue with a Select statement that uses Decode in the Where clause. ===== select Initcap(a. 2. Hi all We can use decode function in the Select columns as well as Group by Columns as well as Having Clause Can we use decode function in the where clause also. Hi all, Feb 17, 2009 · These changes document Community specific rules and Oracle’s content moderation practices including use of automated tools, appeals process, and Oracle’s contact details. Jul 11, 2005 · Hello, We are experiencing an issue with a Select statement that uses Decode in the Where clause. The ANSI standard method is CASE ; however, for your purpose, COALESCE() is the right function and easy to use. Jun 8, 2015 · And Decode works in a similar fashion, although I think it's less readable. Probably you will require more sophisticated filtering - different operators, explicit data type conversion, bind variables - but this is the general idea. If expr is null, then Oracle CEP returns the result of the first search that is also null. I'm brand-new to the Oracle world so this could be a softball. You could use the DECODE function in a SQL statement as follows: SELECT supplier_name, DECODE(supplier_id, 10000, 'IBM', 10001, 'Microsoft', 10002, 'Hewlett Packard', 'Gateway') result FROM suppliers; Jul 17, 2015 · Miracle173, thank you for clarifying, I am using ORACLE SQL, For this particular script, I am not using SQL PLUS, just firing off a script (f5 in TOAD) and running, then inserting the parameter for &Industry. I have tried using a case as well decode but it didn't work. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group In a DECODE expression, Oracle CEP considers two nulls to be equivalent. 7. Sep 5, 2013 · select status_a,status_b from test how to decode status_a,status_b below values using oracle decode function aand if one of the values of status_a or status_b is null. You are writing throw-away code Aug 9, 2017 · The following query appears to be what you want. If expr is equal to a search, then Oracle Database returns the corresponding result. If a match is not found, then the default is returned. ACCOUNT = 545 AND A. but the same condition used in simple query is working well for the multiple p_sub_inv_name parameter values Jul 18, 2016 · However I want to add another case or decode statement in the existing case statement so that only one of four between statements is checked. SQL query with decoding and comparison in where clause. Technical questions should be asked in the appropriate category. 7. Oracle DECODE() function examples. SELECT (columns list) FROM AGREEMENT A WHERE A. :-) – Example. Instead of the expression above, you could use this decode logic: Jun 19, 2015 · Hi,I need to use decode condition in where clause in such a way that if the respective column is null then consider the corresponding column for eg Fee_dateFee_refund_date10-OCT-05 12-NOV-05 11-J Aug 28, 2015 · Your interpretation is correct. Most likely the developer has got into the habit of wrapping nullable columns in an nvl expression, probably after being burned in the past by an unexpected null value, and now adds it everywhere without bothering to think it through, or perhaps without having really understood the issue in the first place. Hot Network Questions Apr 16, 2018 · I have this code for x_eo in ( select decode(mod(card_name_id,2),0,1,1,2) e_o, count(*) nr from rp_Deck where session_id=p_session_id_in and posi Aug 2, 2011 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. Jul 8, 2014 · How to use Oracle's decode function in where clause. inv_type,'OT', (DECODE (item. c_num is unnecessary - null values do not match any regex (in Oracle, they would pass the decode() test either) use standard joins (with the on keyword), rather than old-school implicit joins (with commas in the from clause) Jan 23, 2018 · For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle. I had initially thought to show a full breakdown of the decode statement to show where it went wrong. col2, 'BANDM', c1. enterprise in decode(v_in_enterprise, 'ALL', v. customer_name || ' - ' ||cr. Thank you! Interested in getting your voice heard by members of the Developer Marketing team at Oracle? Check out this post for AppDev or this post for AI focus group Jan 4, 2006 · After some testing what was interesting to me was that Oracle seemed to throw in a leading "order by dept_no asc" that wasn't asked for explicitly. customer_id = pcustomer_id. Sep 22, 2014 · So I've been trying to deal with a poorly optimized/created database. DECODE compares the expression to each search value one by one. segmento but in this case I will obtain an 'a' when id_segmento is equal to '1', I need it to be 'a' even when the string id_Segmento contains the '1', kind of like and like statment. process_id, DECODE(c1. If yes can u give small sample Sur SELECT id_segmento AS Segmento, Decode (id_segmento , '1' , 'a', 'b' ) FROM mapchile. I want to use as: when pcustomer_id IS NULL then WHERE c. ----- Update -----Evaluation of the decode( decode( . SELECT 1 "cast(null)" FROM dual WHERE SYSDATE <= DECODE(1,0,cast(null as date),SYSDATE); That will return a row regardless of the session's nls_date_format because the decode will now return a date data type and you're comparing a date to a date. current_req_status = :block1. QUANTITY, s. are your trying to get records WHERE status is 7 and start date is null? you can use decode but if used in WHERE clause, the result should be compared to another value or column. ORDER_TYPE, 'TRAN1', TAB1. The Aug 7, 2021 · I'm trying to analyze an existing oracle query. Hi All, All are welcome. com. FROM dual. 0 I'm trying to write a function that retuns the number of days between two dates, minus holidays, minus saturdays and sundays. status = (CASE WHEN status_flag = STATUS_ACTIVE THEN 'A' WHEN status_flag = STATUS_INACTIVE THEN 'T' ELSE null END) AND t. customer_id IS NULL; and when pcustomer_id IS NOT NULL then c. SQL Where Clause Help Needed. 3 In addition, decode() is specific to Oracle (is it deprecated yet?). UNION ALL. But most importantly, decode is not suitable for this case. For example: SELECT , (SELECT DECODE((SELECT 23 FROM DUAL), 0, null, There isn't any place for an IN clause in a DECODE. Aug 6, 2024 · This tutorial provides a comprehensive guide to using the SQL DECODE() function in Oracle. name, 1, 0) = 1; From the 19c documentation: In a DECODE function, Oracle considers two nulls to be equivalent. But if the query is written without the DECODE with a single column in the where clause, the index used (In either case). ORDER_SR_NO) I have indexes on all columns as in the where clause, but still find that indexes are not being used. Although Oracle treats it as a special case sometimes. col1, V. assembly_line = ass_line then 1 else 0 end end) = 1 Oct 1, 2011 · In addition to the previous comments (stick with CASE, not DECODE), what is the datatype of the my_date column? If it's of DATE datatype, then don't compare it to a string - instead, explicitly convert the string into a date using either to_date() with the appropriate format mask (e. As I mentioned above, the Oracle DECODE function is an exception to other functions in how it handles NULL values. Id and TableA. Id = TableC. col3=V. business_unit = (CASE WHEN source_flag = SOURCE_FUNCTION THEN 'production' WHEN source_flag = SOURCE_USER THEN 'users' ELSE null END) AND t. Sql Query trying use DECODE in Where ORACLE. Oct 14, 2016 · For appeals, questions and feedback about Oracle Forums, decode in where clause in oracle sql. 2, not 0,2. May 5, 2017 · I don't think its possible to use a list with decode in this way. I'm using oracle DB. For example: SELECT NVL(supplier_city, 'n/a') FROM suppliers; Sep 22, 2015 · Decode with AND clause oracle. Description, Employee. ITEM_PRICE, o. If no match is found, then Oracle returns default. Apr 8, 2020 · The first thing I see is that the WHERE 1=1 condition is not needed. slmdmsosdtshyrdqwffowrjgaqvmsgloddoayaghtiir