Come altri hanno affermato, questo è un po' vago senza presupporre alcune cose. Esistono modi più veloci e meno complicati per risolvere questo problema, ma ho cercato di rendere la mia soluzione il più dinamica possibile per soddisfare la vaga definizione. Ecco le mie ipotesi:
Ecco SQL Fiddle:Demo SQL Fiddle
Ipotesi
- Supponendo SQL Server 2005+
- Supponendo che la data delle tabelle dei turni sia 1900-01-01
- Presume che la tabella Break abbia una data corretta per StartTime / EndTime
- Presuppone che solo 1 persona nel database timbra l'ingresso e l'uscita (NoEmployeeID incluso nella tabella @BREAK)
- Presume il lavoro che fanno per l'intero turno. Timbratura precisa all'inizio del turno e uscita alla fine del turno.
Tabelle
DECLARE @SHIFT Table (ID INT IDENTITY(1,1) PRIMARY KEY, StartTime DATETIME, EndTime DATETIME)
INSERT INTO @SHIFT (StartTime, EndTime) VALUES
('07:20:00','15:20:00'),
('15:20:00','23:20:00'),
('23:20:00','07:20:00')
DECLARE @BREAK Table (ID INT IDENTITY(1,1) PRIMARY KEY, StartTime DATETIME, EndTime DATETIME)
INSERT INTO @BREAK (StartTime, EndTime) VALUES
('1/1/2013 09:10:00','1/1/2013 09:25:00'),
('1/1/2013 11:30:00','1/1/2013 12:05:00'),
('1/1/2013 13:30:00','1/1/2013 13:45:00'),
('1/1/2013 17:10:00','1/1/2013 17:25:00'),
('1/1/2013 19:30:00','1/1/2013 20:05:00'),
('1/1/2013 21:30:00','1/1/2013 21:45:00'),
('1/2/2013 01:10:00','1/2/2013 01:25:00'),
('1/2/2013 03:30:00','1/2/2013 04:05:00'),
('1/2/2013 05:30:00','1/2/2013 05:45:00'),
('1/2/2013 09:10:00','1/2/2013 09:25:00'),
('1/2/2013 11:30:00','1/2/2013 12:05:00'),
('1/2/2013 13:30:00','1/2/2013 13:45:00'),
('1/2/2013 17:10:00','1/2/2013 17:25:00'),
('1/2/2013 19:30:00','1/2/2013 20:05:00'),
('1/2/2013 21:30:00','1/2/2013 21:45:00'),
('1/2/2013 01:10:00','1/2/2013 01:25:00'),
('1/2/2013 03:30:00','1/2/2013 04:05:00'),
('1/2/2013 05:30:00','1/2/2013 05:45:00')
Soluzione
;WITH
MinMaxDates AS --FINDS THE MINIMUM AND MAXIMUM DATE RANGES NEEDING SHIFTS ASSOCIATED.
(
SELECT
CAST(MIN(B.StartTime) AS DATE) AS MinDate,
CAST(MAX(B.EndTime) AS DATE) AS MaxDate
FROM @BREAK AS B
),
RecursiveDateBuilder AS --RECURSIVELY BUILDS A LIST OF DATES BETWEEN THE MINIMUM AND MAXIMUM RANGES IN BREAKS
(
SELECT MinDate AS ShiftStartDate FROM MinMaxDates
UNION ALL
SELECT DATEADD(dd,1,ShiftStartDate) FROM RecursiveDateBuilder WHERE DATEADD(dd,1,ShiftStartDate) <= (SELECT MaxDate FROM MinMaxDates)
),
ShiftSets AS --CREATE A SHIFT SET FOR EVERY DATE
(
SELECT
ROW_NUMBER() OVER (ORDER BY R.ShiftStartDate ASC, S.ID ASC) AS NewShiftID,
S.ID AS OldShiftID,
DATEADD(dd,DATEDIFF(dd,S.StartTime, R.ShiftStartDate),S.StartTime) AS StartDate,
DATEADD(dd,DATEDIFF(dd,S.EndTime, R.ShiftStartDate),S.EndTime) AS EndDate,
R.ShiftStartDate AS ShiftGroup
FROM
@SHIFT AS S
CROSS JOIN RecursiveDateBuilder AS R
),
Shifts AS --FIXES ANY SHIFTS THAT CROSS MIDNIGHT SETTING THEM TO THE NEXT DAY
(
SELECT
S.NewShiftID AS ShiftID,
S.StartDate,
CASE
WHEN S.EndDate <= Min2.MinStartDate THEN DATEADD(DAY,1,S.EndDate)
ELSE S.EndDate
END AS EndDate
FROM
ShiftSets AS S
CROSS APPLY (SELECT MIN(Mins.StartDate) AS MinStartDate FROM ShiftSets AS Mins WHERE Mins.ShiftGroup = S.ShiftGroup) AS Min2
),
BreaksToShifts AS --ASSOCIATES THE PUNCHES TO THE SHIFTS
(
SELECT
B.StartTime AS ClockIn,
B.EndTime AS ClockOut,
S.ShiftID,
S.StartDate,
S.EndDate
FROM
@BREAK AS B
INNER JOIN Shifts AS S ON (B.StartTime BETWEEN S.StartDate AND S.EndDate AND B.EndTime BETWEEN S.StartDate AND S.EndDate)
),
Punches AS
(
SELECT ROW_NUMBER() OVER (ORDER BY S.TheTime ASC) AS ID, S.TheTime FROM
(
SELECT BS.ShiftID, BS.ClockIn AS TheTime FROM BreaksToShifts AS BS
UNION ALL
SELECT BS.ShiftID, MIN(BS.StartDate) AS TheTime FROM BreaksToShifts AS BS GROUP BY BS.ShiftID
UNION ALL
SELECT BS.ShiftID, BS.ClockOut AS TheTime FROM BreaksToShifts AS BS
UNION ALL
SELECT BS.ShiftID, MAX(BS.EndDate) AS TheTime FROM BreaksToShifts AS BS GROUP BY BS.ShiftID
) AS S
)
SELECT
*
FROM
Punches AS P1
INNER JOIN Punches AS P2 ON (P2.ID = P1.ID + 1)
WHERE
P1.ID % 2 > 0
