The CASE statement can be used in the following versions of Oracle/PLSQL: Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i Example The CASE statement can be used in Oracle/PLSQL. You could use the CASE statement in
Functionally these are similar to a series if-elsif statements in PL/SQL. So you may be wondering why bother withcasestatements? Case statements can raise acase_not_foundexception. This happens if they run without processing one of the clauses. i.e. none of thewhenconditions are true an...
Previous to Oracle9i, simple case statements were already supported. In Oracle9i, support for the remaining types of case statements is provided. Simple CASE Statements Simple case statements are much like the decode statement. They can be used to search and then replace a given value within a g...
E.g.: The requirement is to find out the count of employees for various conditions as given below. There are multiple ways of getting this output. Five different statements can be written to find the count of employees based on salary and commission conditions, or a single select having colu...
这时候用一下SQL的语句块就可以了。如果你用的是Oracle数据库,那么你就可以用PL/SQL(Procedure Language/SQL),即过程化查询语言。这是第三代语言。...但如果是在MYSQL/SQLSERVER数据库中,那PL/SQL就无法使用(PL/SQL是属于Oracle的过程查询语言)。..., ...
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2.8 Case Ranges in Switch Statements In standard C, a case label in a switch statement can have only one associated value. Oracle Developer Studio C allows an extension found in some compilers, known as case ranges. A case range specifies a range of values to associate with an individual ...
OracleCASEexpression allows you to addif-elselogic to SQL statements without calling aprocedure. TheCASEexpression evaluates a list of conditions and returns one of the multiple possible results. You can use aCASEexpression in any statement or clause that accepts a valid expression. For example, ...
Summary: in this tutorial, you will learn how to use the PL/SQL CASE statement to control the flow of a program. The CASE statement chooses one sequence of statements to execute out of many possible sequences. The CASE statement has two types: simple CASE statement and searched CASE stateme...