To begin with the CASE expression -the key point is that CASE is an expression, not a statement - it has to return a value.Your CASE looks like this: Code: where case When d = 2 then o.adddte between date1 and date2 when d = 3 then o.adddte between date3 and date4 when d ...
Writingcaseexpressions directly in SQL statements is fine for one-off logic. Often you’ll want to reuse this logic in many queries. Copy-pasting it into every statement is error-prone and hard to maintain. You can avoid these problems by moving the logic into the table definition withvi...
This Oracle WHERE clause example uses the WHERE clause to define multiple conditions, but instead of using the AND condition, it uses the OR condition. In this case, this SELECT statement would return all supplier_id values where the supplier_name is Apple or Microsoft.Example...
By default, Oracle checks content as well as casing, while comparing the two strings in "where" or "like" or "case" statements. For example, the statement given below will return 0. SELECT CASE WHEN 'abc'='ABC' THEN 1 ELSE 0 END AS MATCHED FROM DUAL; ...
"Using the CASE Statement" Using the DECODE Function in Queries TheDECODEfunction compares an expression to several search values. Whenever the value of the expression matches a search value,DECODEreturns the result associated with that search value. IfDECODEfinds no match, then it returns the defa...
In this example, if the deptno column has a 10 in it, the SQL query will return the value accounting rather than the number 10. If the deptno is not 10, 20, 30, or 40, then the CASE statement will fall through to the ELSE clause, which will return unassigned. Note that with a ...
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You can use aCASEexpression in any statement or clause that accepts a valid expression. For example, you can use theCASEexpression in statements such asSELECT,UPDATE, orDELETE, and in clauses likeSELECT,WHERE,HAVING, andORDDER BY. OracleCASEexpression has two formats: the simpleCASEexpression ...
For the case where one or more of your segmentsrequirevalues, you need to perform extra steps to prevent data inconsistencies. The simplest way to do this is to define your segment structures completely, navigate to your form with the new descriptive flexfield, query up each record in your ...
I have a delete statement: My original Delete: DELETE FROM TableName A WHERE SCHED_SURGERY_TM >= TRUNC(sysdate)-90 Now I need to delete based upon...