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Snippet Name: INSERT WHEN

Description: The insert when command can do a conditional insert.

There are 2 modes for conditional insert: ALL and FIRST
If you specify ALL, the default value, then the database evaluates each WHEN clause regardless of the results of the evaluation of any other WHEN clause. For each WHEN clause whose condition evaluates to true, the database executes the corresponding INTO clause list.
If you specify FIRST, then the database evaluates each WHEN clause in the order in which it appears in the statement. For the first WHEN clause that evaluates to true, the database executes the corresponding INTO clause and skips subsequent WHEN clauses for the given row.

Also see:
» INSERT With Returning Clause
» Create Table INSERT (CTAS)
» Inserting into SELECT statement
» INSERT WITH CHECK OPTION
» INSERT FIRST WHEN
» INSERT ALL WHEN
» INSERT ALL
» INSERT: Using A Record
» INSERT with Select
» INSERT: Multiple Column Table Or View ...
» INSERT: Multiple Column Table Or View ...
» INSERT: Single Column Table Or View
» FORALL Insert
» INSERT

Comment: (none)

Language: PL/SQL
Highlight Mode: PLSQL
Last Modified: March 04th, 2009

INSERT
WHEN ([Condition]) THEN
INTO [TableName] ([ColumnName])
VALUES ([VALUES])
ELSE
INTO [TableName] ([ColumnName])
VALUES ([VALUES])
SELECT [ColumnName] FROM [TableName];
 
 
--Sample code:
INSERT
WHEN MOD(deptno,2)=0 THEN
INTO even_employees (empno, ename)
VALUES (empno, ename)
WHEN MOD(deptno,2)=1 THEN
INTO uneven_employees (empno, ename)
VALUES (empno, ename)
ELSE
INTO unknow_employees (empno, ename)
VALUES (empno, ename)
SELECT empno, ename, deptno FROM emp;


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