USE msdb;
EXECUTE sp_add_job @job_name = 'TestJob';
BEGIN
WAITFOR TIME '22:20';
EXECUTE sp_update_job @job_name = 'TestJob',
@new_name = 'UpdatedJob';
END;
GO

B. 使用 WAITFOR DELAY

以下示例在兩小時的延遲后執(zhí)行存儲過程。

BEGIN
WAITFOR DELAY '02:00';
EXECUTE sp_helpdb;
END;
GO
C. 對 WAITFOR DELAY 使用局部變量

以下示例顯示如何對 WAITFOR DELAY 選項使用局部變量。將創(chuàng)建一個存儲過程，該過程將等待可變的時間段，然后將經(jīng)過的小時、分鐘和秒數(shù)信息返回給用戶。

USE AdventureWorks;
GO
IF OBJECT_ID('dbo.TimeDelay_hh_mm_ss','P') IS NOT NULL
DROP PROCEDURE dbo.TimeDelay_hh_mm_ss;
GO
CREATE PROCEDURE dbo.TimeDelay_hh_mm_ss
(
@DelayLength char(8)= '00:00:00'
)
AS
DECLARE @ReturnInfo varchar(255)
IF ISDATE('2000-01-01 ' + @DelayLength + '.000') = 0
BEGIN
SELECT @ReturnInfo = 'Invalid time ' + @DelayLength
+ ',hh:mm:ss, submitted.';
-- This PRINT statement is for testing, not use in production.
PRINT @ReturnInfo
RETURN(1)
END
BEGIN
WAITFOR DELAY @DelayLength
SELECT @ReturnInfo = 'A total time of ' + @DelayLength + ',
hh:mm:ss, has elapsed! Your time is up.'
-- This PRINT statement is for testing, not use in production.
PRINT @ReturnInfo;
END;
GO
/* This statement executes the dbo.TimeDelay_hh_mm_ss procedure. */
EXEC TimeDelay_hh_mm_ss '00:00:10';
GO
下面是結(jié)果集：
A total time of 00:00:10, in hh:mm:ss, has elapsed. Your time is up.