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CREATE TABLE [workingdates]( [workingdateID] [int], [workingdatestart] [datetime], [workingdateend] [datetime] ); INSERT INTO workingdates ([workingdateID], [workingdatestart], [workingdateend]) VALUES ('1', '2019-06-06 00:00:00.000', '2019-06-08 00:00:00.000'), ('2', '2019-06-10 00:00:00.000', '2019-06-11 00:00:00.000'), ('3', '2019-06-12 00:00:00.000', '2019-06-13 00:00:00.000') ;
3 rows affected
DECLARE @min DATE, @max DATE; SELECT @min = MIN(workingdatestart), @max = MAX(workingdateend) FROM workingdates; WITH cte AS ( SELECT DATEADD(DAY, ROW_NUMBER() OVER(ORDER BY 1/0), @min) AS d FROM sys.objects s, sys.objects s2 ) SELECT c.d AS gap FROM cte c LEFT JOIN workingdates w ON c.d BETWEEN w.workingdatestart and w.workingdateend WHERE c.d < @max AND w.workingDateId IS NULL
gap
09/06/2019 00:00:00