How to delete 1 million rows from tables in SQL Server ?

DECLARE @BATCHSIZE INT, @WAITFORVAL VARCHAR(8), @ITERATION INT, @TOTALROWS INT, @MAXRUNTIME VARCHAR(8), @BSTOPATMAXTIME BIT, @MSG VARCHAR(500)
SET DEADLOCK_PRIORITY LOW;
SET @BATCHSIZE = 4000
SET @WAITFORVAL = '00:00:10'
SET @MAXRUNTIME = '08:00:00' -- 8AM
SET @BSTOPATMAXTIME = 1 -- ENFORCE 8AM STOP TIME
SET @ITERATION = 0 -- LEAVE THIS
SET @TOTALROWS = 0 -- LEAVE THIS

WHILE @BATCHSIZE>0
BEGIN
    -- IF @BSTOPATMAXTIME = 1, THEN WE'LL STOP THE WHOLE JOB AT A SET TIME...
    IF CONVERT(VARCHAR(8),GETDATE(),108) >= @MAXRUNTIME AND @BSTOPATMAXTIME=1
    BEGIN
        RETURN
    END

    DELETE TOP(@BATCHSIZE)
    FROM SOMETABLE
    WHERE 1=2

    SET @BATCHSIZE=@@ROWCOUNT
    SET @ITERATION=@ITERATION+1
    SET @TOTALROWS=@TOTALROWS+@BATCHSIZE
    SET @MSG = 'Iteration: ' + CAST(@ITERATION AS VARCHAR) + ' Total deletes:' + CAST(@TOTALROWS AS VARCHAR)
    RAISERROR (@MSG, 0, 1) WITH NOWAIT
    WAITFOR DELAY @WAITFORVAL 
END
DECLARE @BATCHSIZE INT, @WAITFORVAL VARCHAR(8), @ITERATION INT, @TOTALROWS INT, @MAXRUNTIME VARCHAR(8), @BSTOPATMAXTIME BIT, @MSG VARCHAR(500) SET DEADLOCK_PRIORITY LOW; SET @BATCHSIZE = 4000 SET @WAITFORVAL = '00:00:10' SET @MAXRUNTIME = '08:00:00' -- 8AM SET @BSTOPATMAXTIME = 1 -- ENFORCE 8AM STOP TIME SET @ITERATION = 0 -- LEAVE THIS SET @TOTALROWS = 0 -- LEAVE THISWHILE @BATCHSIZE>0 BEGIN-- IF @BSTOPATMAXTIME = 1, THEN WE'LL STOP THE WHOLE JOB AT A SET TIME...IF CONVERT(VARCHAR(8),GETDATE(),108) >= @MAXRUNTIME AND @BSTOPATMAXTIME=1BEGINRETURNENDDELETE TOP(@BATCHSIZE)FROM SOMETABLEWHERE 1=2SET @BATCHSIZE=@@ROWCOUNTSET @ITERATION=@ITERATION+1SET @TOTALROWS=@TOTALROWS+@BATCHSIZESET @MSG = 'Iteration: ' + CAST(@ITERATION AS VARCHAR) + ' Total deletes:' + CAST(@TOTALROWS AS VARCHAR)RAISERROR (@MSG, 0, 1) WITH NOWAITWAITFOR DELAY @WAITFORVAL END