SQL Server 2008中SQL之WaitFor使用介绍

WAITFOR 
{
  DELAY 'time_to_pass' 
 | TIME 'time_to_execute' 
 | [ ( receive_statement ) | ( get_conversation_group_statement ) ] 
  [ , TIMEOUT timeout ]
}

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

BEGIN
WAITFOR DELAY '02:00';
EXECUTE sp_helpdb;
END;
GO

USE AdventureWorks2008R2;
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