RE: issue with datetime – SQLServerCentral

SSC Guru

Points: 186127

September 26, 2014 at 7:27 am

BWFC (9/26/2014)
What exactly is the problem? You need to be very careful using BETWEEN with datetime. You're much better using >= and <=.

Looks ok to me:

-- Non-SARGable

;WITH MyTable AS (

SELECT CreatedOn = CAST('20140731' AS DATETIME) UNION ALL

SELECT CAST('20140801' AS DATETIME) UNION ALL

SELECT CAST('20140802' AS DATETIME) UNION ALL

SELECT CAST('2014-09-24 14:49:35.190 ' AS DATETIME) UNION ALL

SELECT CAST('20140925' AS DATETIME) UNION ALL

SELECT CAST('20140926' AS DATETIME) UNION ALL

SELECT CAST('20140927' AS DATETIME)

)

SELECT *

FROM MyTable

WHERE CONVERT(VARCHAR(10),CreatedOn,103) BETWEEN '01/08/2014' AND '26/09/2014'

-- SARGable

;WITH MyTable AS (

SELECT CreatedOn = CAST('20140731' AS DATETIME) UNION ALL

SELECT CAST('20140801' AS DATETIME) UNION ALL

SELECT CAST('20140802' AS DATETIME) UNION ALL

SELECT CAST('2014-09-24 14:49:35.190 ' AS DATETIME) UNION ALL

SELECT CAST('20140925' AS DATETIME) UNION ALL

SELECT CAST('20140926' AS DATETIME) UNION ALL

SELECT CAST('20140927' AS DATETIME)

)

SELECT *

FROM MyTable

WHERE CAST(CreatedOn AS DATE) BETWEEN CAST('20140801' AS DATE) AND CAST('20140926' AS DATE)

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

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