How to return multiple values for then clause in an sql case expression oracle. so how else could I write this? .

How to return multiple values for then clause in an sql case expression oracle. I've tried to remedy this by using the IN or ANY statements, but looks to me like the CASE expression simply is unable to output sets of multiple values. I have a scenario where I have to run a report in automatic and manual mode. Number WHEN '1121231','31242323' THEN 1 WHEN '234523','2342423' THEN 2 END AS Test FROM tblClient c; When working with SQL, one might often need to run complex queries that involve multiple conditional statements. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). I have written the following query and in this condition i can't use in clasue. Knowing that you Return multiple values for 'Then' clause in an SQL case expression. [desc] = 'string4' THEN If they choose the No Selection option, then I just want to return all states by default, otherwise return just the list of states that are in my comma-separated list. SQL> select 2 case 1+3+4 3 when 5 then 12 4 when 6 then 13 5 when 8 then 15 6 end x 7 from dual; X ----- 15 Let me explain again . Returning multiple values in a CASE expression. DETAIL_CODE FROM which is just like doing AND 1 IN (SELECT 1 FROM . DISBURSALDATE) >= TRUNC( SYSDATE - (CASE WHEN to_char(sysdate,'Day') = 'Sunday' THEN 3 ELSE 1 END) -- this 1 1) Case: 2 3 a) If a <result> specifies NULL, then its value is the null 4 value. The conditions are evaluated sequentially, and the first condition that is met determines the result. There are several enhancements to case available in PL/SQL: case statements; Extended case controls (from 23ai) Case statements in PL/SQL. The problem is you trying to shove multiple values into a single field for a single row. The SQL CASE expression allows you to evaluate a list of conditions and returns one of the possible results. It stops processing as soon as a WHEN clause is true. Here's more about Oracle Scalar Subqueries: Here are the CASE expression examples from the PostgreSQL docs (Postgres follows the SQL standard here):. CASE expressions allow you to set conditions for your data and use similar logic to if-then statements to search your data, Multiple CASE WHEN statements allow you to implement conditional logic in SQL queries, allowing for the evaluation of multiple conditions and the execution of different actions You have to repeat your case construct for each column name. This is how my code looks but it is not working. 40. short_name IN Is there a "better" way to rewrite a SELECT clause where multiple columns use the same CASE WHEN conditions so that the conditions are only checked once? See the example below. SELECT a, CASE WHEN a=1 THEN 'one' WHEN a=2 THEN 'two' ELSE 'other' END FROM test; or. select ID, TERM_CODE, DETAIL_CODE from tableName where TERM_CODE In the realm of SQL, the CASE WHEN statement functions much like an if-then-else expression, allowing us to create custom classifications within a query. If the I need to use a CASE WHEN statement in my query with multiple 'THEN' options. So, once a condition is true, it will stop reading and return the result. The code up the top seems to be what I need, but I'm having trouble tailoring it to my needs. 3) subquery. For Automatic mode - all the I used case when but I cannot seem to return more than 1 value. If all rows for a specific 'Utility' do have a 'todate', I want the value to be Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The subquery (select acct_id from TABLE2 group by acct_id having count(*) = 1 ) is OK because it will only ever return one value. The subquery returns a result set of one column to test for the match. to values. 13. Meaning that it can only return one value. – I need to create a CASE statement that will look at the multiple rows for a 'Utility' to determine the output. *, (case colB when 'January' then 1 when 'February' then 2 when 'March' then 3 when 'April' then 4 when 'May' then 5 when 'June' then 6 when 'July' then 7 when 'August' then 8 when 'September' then 9 when 'October' then 10 when 'November' then 11 when 'December' then 12 end) as monthnum from t ) select colA, (select top 1 The CASE expression is like a more flexible version of the DECODE function. The question is specific to SQL Server, but I would like to extend Martin Smith's answer. Hot Network Questions Write a program that takes an input value n and then finds the first n primes The recommended way to handle this in Oracle is to create a Temporary Table, write the values into this, and then join to this. Depending on the fulfillment of conditions, EDIT 2: After doing a bit more reading on the subject it seems that I need a stored procedure to do this. put_line('Good'); WHEN grade = 'D' THEN dbms Ordering Conditions in CASE. In PL/SQL you can write a case statement to run one or more actions. The result of the case statement is either 1 or 0. Instead, use AND and OR:. SELECT student_id, course_id, CHOOSE( CASE grade A Subquery in the Select clause, as in your case, is also known as a Scalar Subquery, which means that it's a form of expression. I know that l_status stores only 1 value. Both IIF() and CASE resolve as expressions within a SQL How to return multiple values for THEN clause in an SQL CASE expression Hi Tom,The question which i am asking might look very simple but for the past 2 days I have been trying for a solution and checking in multiple forums but couldn't get any clue. multiple Like expression in sql query using case exprssion. put_line('Very Good'); WHEN grade = 'C' THEN dbms_output. To be honest, I can't recall if I found it in the docs or what. But I want something like l_status = 'n','s' I am using this case statement in the where How can I return two columns if a condition is satisfied in case? The short answer is you can't. case statement in SQL, how to return multiple variables? 1. type="bk" THEN books. But it's important to build them accurately. Commented Jul 2, 2010 at 6:38. It isn't really shown in the doc for SELECT (at least I can't find it now. tag = 'Y' THEN 'other string' WHEN codes. bad' DISCARDFILE 'F:\SQL_Loader\dept. The SQL CASE Expression. region IN If you read the documentation you will find 2 things 1) Its a case expression, not a statement, and that 2) it can only return a scalar value, not an expression. select * from cardimport where STATUS = CASE WHEN STATUS = '' THEN 'F' ELSE STATUS END Let’s try the example from the previous section again, but this time we’ll use the CHOOSE() function instead of the IIF() or CASE expression. I just wanted to show the pattern that works like IN in oracle with multiple fields. The column must also have the same data type as expression. Using case in PL/SQL. The simple CASE is more concise when you’re just comparing a single expression against multiple possible values. From SQL Server 2012 you can use the IIF function for this. Kindly guide me how can i return multiple parameters from case clause. This is similar in Is there anyway that I can change column name through THEN clause in CASE STATEMENT. sql The SQL CASE Expression. Instead of checking on @check you should check on the element that has multiple options. Oracle Case in WHERE Clause with multiple conditions. Evaluates a list of conditions and returns one of multiple possible result expressions. So something like this: ELSE 2 END. sql - problems with conditional WHERE clause with CASE statement Using Case statement in Where This will return the same row multiple times if Field1 matches multiple LIKE. But instead of returning String, i want to return an expression. Example: CASE WHEN wall. So now you can build conditions in the WHEN clause. If that happens an ORA-01427 exception is thrown. If no condition is found to be true, and an With a simple case you can check if an input equals any listed key. The value match CASE expression, or simple CASE expression, compares the value of the expression (DEPTNO), with the list of comparison expressions (10 - 40). I prefer the conciseness when compared with the expanded CASE version. The optional ELSE clause allows I have a codition in which i need to use multiple parameters in where clause using Conditional operator. ) SELECT * FROM <table_name> WHERE (value_type = 1 and CODE1 = 'COMM') OR (value_type = 1 and CODE1 = 'CORE') (In this case, you could make it shorter, because value_type is compared to the same value in both combinations. – dnoeth. Commented May 15, SQL Case and LIKE in where clause. 1 "cased" where, multiple values for one when. SQL CASE with one condition and with t as ( select t. In SQL case statement we pass the value and check the case according to value and return string. Oracle SQL CASE expression in WHERE clause only when conditions are met. I'm afraid you can't return multiple columns from a single Scalar Subquery, no. If your test value matches the first WHEN clause, the THEN clause is returned and the CASE expression is finished. The CASE expression returns a value. For Automatic mode - all the paramete Since web search for Oracle case tops to that link, I add here for case statement, though not answer to the question asked about case expression: CASE WHEN grade = 'A' THEN dbms_output. However, CASE expressions are indirectly needed inside the CHOOSE() function to perform the operations completely. Viewed 785 times 1 My "files" table data is SQL return multiple values from CASE statement. csv' BADFILE 'F:\SQL_Loader\dept. Another way to return many values using CASE is to return them as a complex type. If there is no ELSE part and no conditions are true, it returns NULL. you might want to move the opening parentheses in the second then clause one word right. Modified 2 years, 10 months ago. g. Additionally, you have AND t. Once it finds a match, the associated value is returned. 8 9 2) Case: 10 11 a) If the <search condition> of some <searched when clause> in 12 a <case specification> is true, then the value of the <case 13 . A reader, March 11, 2021 - 4:38 am UTC The CASE statement returns a "column value" that cannot be evaluated as a WHERE CONDITION itsef, but you can use it as a value 1 or 3 depending on sysdate, and then use this value in the filter condition: WHERE TRUNC(C. You should use multiple INSERT INTO DEPT_LOADER . 1. Is this is possible using oracle This works well until the sub-select returns multiple rows. Let’s perform IF-THEN logic in SQL:. put_line('Excellent'); WHEN grade = 'B' THEN dbms_output. Edit starts here. SELECT CASE c. The CASE expression evaluates a list of conditions and returns one of the multiple In a searched CASE expression, Oracle searches from left to right until it finds an occurrence of condition that is true, and then returns return_expr. Take a look at Regular expressions in Perl with examples. sql Case statement bring back multiple values. Your control file should be like; LOAD DATA INFILE 'F:\SQL_Loader\dept. Python uses if , elif , and else , Followed the IN operator is a list of comma-separated values to test for a match. If no match is found, it returns the ELSE value. SELECT a, CASE a WHEN 1 THEN 'one' WHEN 2 THEN 'two' ELSE 'other' END FROM test; Functions destroy performance. 2. 1 1) Case: 2 3 a) If a <result> specifies NULL, then its value is the null 4 value. 0. How to return multiple values for THEN clause in an SQL CASE expression Hi Tom,The question which i am asking might look very simple but for the past 2 days I have been trying for a solution and checking in multiple forums but couldn't get any clue. ) You can use another column to store the other id with (a similar case) and use nulls to represent the else values, just like you're doing now. 8 9 2) Case: 10 11 a) If the <search condition> of some <searched when clause> in 12 a <case specification> is true, then the value of the <case 13 Oracle 10g has functions that allow the use of POSIX-compliant regular expressions in SQL: REGEXP_LIKE; REGEXP_REPLACE; REGEXP_INSTR; REGEXP_SUBSTR; See the Oracle Database SQL Reference for syntax details on this functions. (select name from TABLE3 where TABLE1. SQL doesn't support multiple returns from a case. Oracle SQL - Multiple return from case. SQL processes CASE expression from top-to-bottom. For example: select from emp where case when bonus is null then salary else salary + bonus end > 4000 Here emp is a table, and bonus and salary are two of the columns in that table. All the values must have the same data type as expression. You can make your aliases whatever you want. SELECT name, CASE WHEN table1. create global temporary table LOOKUP ( ID NUMBER ) on commit delete rows; -- Do a batch insert from your application to populate this Hi, Dieter Glad that the (+) syntax is helpful for you. If there is a NULL 'todate' in any row for a specific 'Utility' (Solid Waste for example) I want to create a 'Status' column with a value of 'Active'. id1 END as column_1, CASE WHEN wall. acct_id= TABLE3. Introduction to SQL CASE expression. A case expression returns a single value. Or perhaps something like: WHERE. [desc] = 'string3' THEN 'String 3' WHEN codes. [desc] = 'string1' THEN 'String 1' WHEN codes. You select only the records where the case statement results in a 1. MYSQL CASE THEN statement with multiple values. This query is designed in Oracle v10, and I am eligible to use only select queries and not to create procedures. The same WHERE clause can be expressed more simply, but regardless of reformulation, it will refer to both columns. For some complex WHERE clauses, it may make sense to use it (your current one can be solved without, as @Somebody is in trouble's answer shows), but you need to structure it to return a single result This construct proves invaluable in handling scenarios where more than one condition needs consideration. 18. a SQL statement needs to return a fixed set of columns, including the column name. I would like to return multiple values in my case statement, such as : SELECT CASE WHEN <condition 1> THEN <value1=a1, value2=b1> WHEN <condition 2> THEN <value1=a2, I am using the case statement in the cursor WHERE condition something like the below:---example select case when (l_eno is null and l_ename is null) then l_status = 'new' how can return multiple values for THEN in CASE. So, once a condition is true, it In a CASE statement with multiple WHEN clauses, the order is significant. acct_id) could return multiple values depending on your data. A Case statement can only return one value. 5 6 b) If a <result> specifies a <value expression>, then its value 7 is the value of that <value expression>. Related. By enclosing the queries in parentheses, you are converting them (syntactically) to values. select id, case when V1=1, then 'A' when V2=1, then 'B' when V3=1, then 'C' when V4=1, then 'D' when V5=1, then v5_text Returning Multiple Columns under a single Then Clause using Case in PL/SQL. If you want to use case, then you need to return a value and do a comparison: (CASE order_date > sysdate and fee_rate_type in ('REGULAR', 'BONUS') then 1 order_date <= sysdate and FEE_RATE_TYPE in ('REGULAR') then 1 END) = 1 However, I would encourage you not to use case in a SQL*Loader does not allow OR operator in WHEN clauses. But you could use a common-table-expression(cte): with cte as ( Select IsNameInList1 = case when name in ('A', 'B') then 1 else 0 end, IsNameInList2 = case when name in ('C', 'D') then 1 else 0 end, t. Code : select * from tbl where regexp_like(col, CASE is an expression - it returns a single result of a well defined type:. id2 END as column_2 Check the official documentation for more information. 3. The IN operator returns true if the value of Summary: in this tutorial, you will learn how to use the SQL CASE expression to add the logic to the SQL statements. The table structure is as follows: application_id name location_id ----- 1 Joe Blogs 34 2 John Smith 55 IF/THEN logic with CASE expressions in SQL - SQL Office Hours August 2023 Scripts. To a specify the column name in the resultset, assign an alias. Essentially a versatile and powerful tool, the CASE expression enables users to perform conditional logic within SQL queries, making it tremendously helpful for dealing with diverse Oracle SQL CASE expression in WHERE clause only when conditions are met. [desc] = 'string2' THEN 'String 2' WHEN codes. If it does you can return a corresponding value. If you are not adverse to string manipulation, you could do something like: left(org_status_letter, charindex('|', Understanding CASE Expression Syntax. The longer answer is you can do things like: - Concatenate all the columns into Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. This structure of this is: If the <selector> matches none of In this article, we’ll explore how to use the CASE statement with multiple conditions, providing simple examples that should work across most major relational database Here is a snip-it of code from a where clause where I needed it to return multiple values: AND CASE '{EOC_TEST_TYPE}'::text WHEN 'NGSYB' THEN t. For example, JSON, XML or an object type. It is not an assignment but a relational operator. Something like this: case ColumnName when 'A' then 'Apple' when 'B' then 'Banana' end ColumnName, case simple-case-statement-when-clause The value of the expression before the first WHEN keyword is tested for equality with the value of each expression that follows the WHEN keyword. SELECT IIF(Obsolete = 'N' OR InStock = 'Y', 1, 0) AS Salable, * FROM Product This is effectively just a shorthand (albeit not standard SQL) way of writing CASE. If there’s a match, it returns the corresponding THEN value. Add a comment | 2 Please do note that it is not a case STATEMENT, it is a case EXPRESSION. For Automatic mode - all the paramete You cannot return an expression from the THEN clause of a CASE expression; it needs to return a single scalar value. Using dynamically created IN clauses means the query optimizer does a 'hard parse' of every query. DETAIL_CODE IN (SELECT t. The CASE expression has two formats: simple CASE and searched CASE. Thanks in Advance, i use an oracle 10g. SQL Server: use CASE with LIKE. Other programming languages use similar logic – e. The query below will return the records where TYPE is either typeA or You can use the slightly more robust case syntax and express the cases as conditions instead of just possible values:. If no conditions are true, it returns the value in the ELSE clause. * from table ) select userid , case when IsNameInList1=1 then 'Apple' when IsNameInList2=1 then 'Pear' end as snack , case ColumnName when 'A' then 'Apple' when 'B' then 'Banana' end ColumnName, case ColumnName when 'A' then '1' when 'B' then '2' end ExtraColumn, There is a gotcha here. Return value. If you use ColumnName in your where clause, you might not like the results because you used it as an alias. . This is where the SQL CASE expression comes into play. However, it’s less flexible than the searched CASE, which can handle multiple conditions and more complex logic. In where clause I want to return only one row based on condition: if Description contains "SEMI" and SEMI_GV contains SEMI, return this row (2nd row) if Description contains anything else, return this row (1st row) The WHERE clause is working for the case when description contains the 'semi' in it, however I tried to put the another conditions but then it returns all the rows, because for each the value collumn is different. The differences between case expressions and statements are: You complete Obviously I can't return multiple values from a CASE clause so how else could I write this? How to return multiple values from a SQL Case subquery without grouping. 11. I think you don't need CASE statement , you can use IN operation instead of Case , like this SELECT * FROM FRUIT WHERE TYPE = 'something' AND COLOR IN ('RED', 'YELLOW') OR TYPE The case statement is an expression that returns a single value. Ask Question Asked 5 years, 7 months ago. Thanks for accepting this as the answer but Tony Andrews solution is a lot more straightforward and, in my view, the better answer. Of course you can. The above syntax allows the user to select specific columns from a table while creating a new column (new_column) with values calculated based on specified conditions using the CASE WHEN statement. dsc' INSERT INTO TABLE DEPT_LOADER WHEN DEPT = '10' FIELDS If you want to have this evaluation only once, the query gets slightly more complicated, as you'd go in two steps: SELECT CASE WHEN which = 'left' THEN stddev_left ELSE stddev_right END AS value1, CASE WHEN which = 'left' THEN mean_left ELSE mean_right END AS value2, CASE WHEN which = 'left' THEN median_left ELSE median_right if the value of @check is 0 then return 'typeA' otherwise return ('typeB' OR 'typeC') But how can SQL return multiple values? Most likely you should change your CASE statement like below. Even if a value actually meets several WHEN conditions, the first condition it meets is the only one that will be returned. SQL Multiple LIKE Statements. SQL:2003 standard allows to define multiple values for simple case expression:. vegq qtruq putgxjc jbvv qxrlp msuz lfkudwg thfmnswm icwmm lumyrxi