How to update a date range?

Question

4.00/5 (1 vote)

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SQL-Server-2005

This is my sql code

 DECLARE @Product TABLE ( Date_From Datetime, Date_To Datetime, Product_ID INT)
INSERT INTO @Product Values
('20110323', '20110326', 101)
INSERT INTO @Product Values
('20110327','20110329',101)

-- The actual solution --
DECLARE @Beg Datetime, @End Datetime
SET @Beg = '20110323'
SET @End = '20110323'

IF @Beg = @End
BEGIN
    DECLARE @Temp TABLE (Date_From Datetime, Date_To Datetime, Product_ID INT, [Version] INT)
    INSERT INTO @Temp
    SELECT p.*, x.[Version]
    FROM @Product AS p, (SELECT 1 AS [Version] UNION SELECT 2 AS [Version]) AS x
    WHERE @Beg BETWEEN p.Date_From AND p.Date_To   

    DELETE FROM @Product WHERE @Beg BETWEEN Date_From AND Date_To   

    UPDATE @temp SET
        Date_From = CASE WHEN [Version] = 1 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, -1, @Beg)
                         WHEN [Version] = 2 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, +1, @Beg)
                         ELSE Date_From END,
        Date_To =  CASE WHEN [Version] = 1 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, -1, @Beg)
                       WHEN [Version] = 2 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, +1, @Beg)
                       ELSE Date_From END
    INSERT INTO @Product ( Date_From, Date_To, Product_ID)
    SELECT  Date_From, Date_To, Product_ID FROM @Temp
END

ELSE

BEGIN
    UPDATE @Product
     SET
        Date_From = CASE WHEN Date_From BETWEEN @Beg AND @End THEN DateAdd(dd, 1, @End) ELSE Date_From END,
        Date_To = CASE WHEN Date_To BETWEEN @Beg AND @End THEN DateAdd(dd, -1, @Beg) ELSE Date_To END
    WHERE Date_From BETWEEN @Beg AND @End
    OR Date_To BETWEEN @Beg AND @End
DELETE FROM @Product WHERE Date_From > Date_To
END

SELECT * FROM @Product ORDER BY Date_From

this is the out put...

2011-03-22 00:00:00.000 2011-03-22 00:00:00.000 101
2011-03-24 00:00:00.000 2011-03-24 00:00:00.000 101
2011-03-27 00:00:00.000 2011-03-29 00:00:00.000 101

problem in this output is 22 that is not in the DECLARE table

Wht i need is below out put

2011-03-24 00:00:00.000 2011-03-26 00:00:00.000 101
2011-03-27 00:00:00.000 2011-03-29 00:00:00.000 101

Posted 23-Mar-11 1:51am

amtechq8

Updated 23-Mar-11 2:15am

v2

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Wendelius · Accepted Answer · 2011-03-23T02:03:00

The first impression is that you create the 22th because you first insert 23rd and then you substract 1 day. Try commenting out the

SQL

PDATE @temp SET
        Date_From = CASE WHEN [Version] = 1 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, -1, @Beg)
                         WHEN [Version] = 2 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, +1, @Beg)
                         ELSE Date_From END,
        Date_To =  CASE WHEN [Version] = 1 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, -1, @Beg)
                       WHEN [Version] = 2 AND @Beg BETWEEN Date_From AND Date_To THEN DateAdd(dd, +1, @Beg)
                       ELSE Date_From END

portion to see this.

[Addition]
Based on the desription, could you try something like this:

SQL

DECLARE @Product TABLE ( Date_From Datetime, Date_To Datetime, Product_ID INT)
INSERT INTO @Product Values ('20110323', '20110324', 101);
INSERT INTO @Product Values ('20110325', '20110326', 101);
INSERT INTO @Product Values ('20110327', '20110329', 101);
DECLARE @Beg Datetime, @End Datetime
-- test case 1
SET @Beg = '20110323'
SET @End = '20110323'
-- test case 2
--SET @Beg = '20110324'
--SET @End = '20110327'
-- Set in range dates to null
UPDATE @Product SET 
   Date_From =  CASE 
	               WHEN Date_From BETWEEN @Beg AND @End THEN NULL 
                   ELSE Date_From
                END,
   Date_To =  CASE 
	               WHEN Date_To BETWEEN @Beg AND @End THEN NULL 
                   ELSE Date_To
                END;
-- remove rows having no dates
DELETE FROM @Product 
WHERE Date_From IS NULL
AND Date_To IS NULL;
--update the missing ends to beginning/end correspondingly
UPDATE @Product
SET Date_From =  CASE 
	               WHEN Date_From IS NULL THEN DATEADD(day, +1, @End)
                   ELSE Date_From
                END,
    Date_To =  CASE 
	               WHEN Date_To IS NULL THEN DATEADD(day, -1, @Beg)
                   ELSE Date_To
                END;
                
SELECT * FROM @Product 
ORDER BY Date_From