我正在尝试计算两个日期时间值之间的差异。
我尝试了datediff(s, begin,end)
和datediff(ms, begin,end)
但是我想将差异作为seconds,milliseconds
返回,如下所示:
4,14
63,54
答案 0 :(得分:27)
SELECT
DATEDIFF(MILLISECOND, begin, end) / 1000,
DATEDIFF(MILLISECOND, begin, end) % 1000
FROM ...;
如果您绝对必须在SQL查询中将其形成为字符串(您的表示层不能这样做吗?),那么:
SELECT
CONVERT(VARCHAR(12), DATEDIFF(MILLISECOND, begin, end) / 1000)
+ ','
+ RIGHT('000' + CONVERT(VARCHAR(4), DATEDIFF(MILLISECOND, begin, end) % 1000), 3)
FROM ...;
另外,我真的希望你的列名比begin
和end
更好。
答案 1 :(得分:4)
实际上,标记的答案会产生错误的结果,以毫秒为单位1 - 99:
Example 1 second, 27 milliseconds:
1) DATEDIFF % 1000 will return 27
2) CONVERT will convert to '27'
3) String concatenation will build '1' + ',' + '27'
4) Result: '1.27' which means 270ms rather than 27ms
不要忘记将毫秒填充为三个零:
DECLARE @start datetime2(7) = '2015-07-03 09:24:33.000'
DECLARE @end datetime2(7) = '2015-07-03 09:24:34.027'
SELECT
CAST (DATEDIFF(SECOND, @start, @end) AS nvarchar(3)) + N'.' +
RIGHT('000' + CAST((DATEDIFF(MILLISECOND, @start, @end) % 1000) AS nvarchar(3)), 3)
答案 2 :(得分:0)
DATEDIFF在MySQL中仅接受两个参数。这对我有用:
TIMESTAMPDIFF(SECOND, NOW(), '2019-09-09 18:52:00')