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simple query question

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bill_
Starting Member

38 Posts

Posted - 2009-04-24 : 11:45:58

HOw do you query for rows where 2 date columns are within 1 day of each other?

One date is a datetime and the other is a string like '20081225'.

Lamprey
Master Smack Fu Yak Hacker

4614 Posts

Posted - 2009-04-24 : 13:13:13

Here is one way:

--Set up sample data
DECLARE @Table TABLE (ID INT PRIMARY KEY, Date1 DATETIME, Date2 VARCHAR(8))

INSERT @Table
SELECT 1, '2009-04-24 10:10:00' , '20090422'
UNION ALL SELECT 2, '2009-04-24 10:10:00' , '20090423'
UNION ALL SELECT 3, '2009-04-24 10:10:00' , '20090424'
UNION ALL SELECT 4, '2009-04-24 10:10:00' , '20090425'
UNION ALL SELECT 5, '2009-04-24 10:10:00' , '20090426'

-- Run Query
SELECT *
FROM @Table
WHERE ABS(DATEDIFF(DAY, Date1, CAST(Date2 AS DATETIME))) = 1

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