上面的图片代表了我一直试图在MSSQL中完成的事情。
这是一个具有多个时间范围的时间表,A到B是加班,B到C是早上的常规工作,C到D是午餐时间,D到E是下午的常规工作,E到F,也是加班。 >
为简单起见,我手动将A,B,C,D,E和F声明为固定值。实际上,这些将从另一个表中获取,但与该问题无关。
垂直箭头代表计时输入/输出时间。
所以,假设进站时间是早上8点,出站时间是晚上7点。
如何检索以下内容?
工作:8小时
午餐:1小时
加班:2小时
无需使用混乱的 IF ,并且知道IN可能位于B和C的中间。
有人在早上11点钟上班,在晚上7点钟下班,现在工作= 6h,午餐= 1h,加班时间= 1h。
谢谢。
例如,以我当前的意大利面条代码为例,肯定有一种更优雅(更简洁)的方法来实现此目的。
declare @clockIn time = '08:00'
declare @clockOut time = '19:00'
declare @a time= '00:00'
...all possible limits defined here...
declare @f time= '23:59'
tests using C to D only:
-- in block
IF(@clockIn >= @c
AND @clockOut <= @d)
BEGIN
SET @at = @at + ABS(DATEDIFF(hour, @clockIn, @clockOut));
END;
-- outside block
IF(@clockIn < @c
AND @clockOut > @d)
BEGIN
SET @at = @at + ABS(DATEDIFF(hour, @c, @d));
END;
-- cIn in block, cOut outside
IF(@clockIn >= @c
AND @clockOut > @d)
BEGIN
SET @at = @at + ABS(DATEDIFF(hour, @clockIn, @d));
END;
-- cIn outside, cIn inside
IF(@clockIn < @c
AND @clockOut <= @d)
BEGIN
SET @at = @at + ABS(DATEDIFF(hour, @c, @clockOut));
END
select @ax as overtime,@at as work,@ai as lunch
答案 0 :(得分:1)
我想不出不以某种方式构建if-then逻辑就可以做到这一点的方法,所以这取决于您如何做。我认为最简单(也许也是最易读)的方法是在每次需要的时间使用一个case表达式,也许在逻辑后面留下一些评论,以便遇到它的任何人都可以更容易地理解它的工作方式。 / p>
例如,这样的事情应该足够简单,而不会造成太多混乱(IMO):
DECLARE @Clock TABLE (Clockin TIME NOT NULL, Clockout TIME NOT NULL);
INSERT @Clock VALUES ('12:30', '19:00');
DECLARE @Times TABLE (WorkStart TIME NOT NULL, LunchStart TIME NOT NULL, LunchEnd TIME NOT NULL, WorkEnd TIME NOT NULL);
INSERT @Times VALUES ('09:00', '12:00', '13:00', '18:00');
SELECT
OverTime =
(CASE -- Overtime hours in the morning.
WHEN C.Clockin < T.WorkStart -- Clocked in before official work start.
THEN DATEDIFF(MINUTE, C.Clockin, CASE WHEN C.Clockout > T.WorkStart THEN T.WorkStart ELSE C.Clockout END)
ELSE 0
END +
CASE -- Overtime hours in the evening.
WHEN C.Clockout > T.WorkEnd -- Clocked out after official work end.
THEN DATEDIFF(MINUTE, CASE WHEN C.Clockin > T.WorkEnd THEN C.Clockin ELSE T.WorkEnd END, C.Clockout)
ELSE 0
END) / 60.0,
Work =
(CASE -- Work hours for the morning.
WHEN C.Clockout > T.WorkStart AND C.Clockin < T.LunchStart -- Clocked out after official work start and clocked in before official lunch start.
THEN DATEDIFF(MINUTE, CASE WHEN C.Clockin < T.WorkStart THEN T.WorkStart ELSE C.Clockin END, CASE WHEN C.Clockout < T.LunchStart THEN C.Clockout ELSE T.LunchStart END)
ELSE 0
END +
CASE -- Work hours for the afternoon.
WHEN C.Clockin < T.WorkEnd AND C.Clockout > T.LunchEnd -- Clocked out after official lunch end and clocked in before official work end.
THEN DATEDIFF(MINUTE,CASE WHEN C.Clockin < T.LunchEnd THEN T.LunchEnd ELSE C.Clockin END, CASE WHEN C.Clockout < T.WorkEnd THEN C.Clockout ELSE T.WorkEnd END)
ELSE 0
END) / 60.0,
Lunch =
CASE -- Lunch hours.
WHEN C.Clockin < T.LunchEnd AND C.Clockout > T.LunchStart -- Clocked in before official lunch end and clocked out after official lunch start.
THEN DATEDIFF(MINUTE, CASE WHEN C.Clockin > T.LunchStart THEN C.Clockin ELSE T.LunchStart END, CASE WHEN C.Clockout < T.LunchEnd THEN C.Clockout ELSE T.LunchEnd END)
ELSE 0
END / 60.0
FROM @Clock AS C
CROSS JOIN @Times AS T;