tsql while循环和时间问题

Question

我不知道我的查询有什么问题,但它并没有突破while循环.我认为这是我如何计算时间但不确定.

DECLARE @start DATETIME = GETDATE(), @currenttime INT = 0

while @currenttime <= 1 --- represent min
begin

    [execute Query]

    ' this will always return 0 and keep executing query even though the 1 min has been reached
    set @currenttime = CONVERT(INT, DATEDIFF(s, @start, GETDATE())%3600/60) 
end

Answer 1

另一种方法是更改​​while循环的条件:

SELECT @Start = GETDATE()

WHILE DATEDIFF(SECOND, @Start, GETDATE()) < 3 -- Execute the loop for 3 seconds
BEGIN

SELECT 1

END