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Editorial Team
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Asked: 2026-06-08T01:37:23+00:00

Im using MSSQL 2008 and have a field called AbsoluteDates that contains data in

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Im using MSSQL 2008 and have a field called AbsoluteDates that contains data in numeric for mat, for example

AbsoluteDates
20051216
20051217
20051218
10000
90
600

What i need to do is a “Select” statement that will ignore any date thats not 8 numbers in lenth and then convert the results to a datetime ,aso it should be like a case statement becuase i need to produce something when the length is not 8 charectors , for example the word ” NotValid”

so for example , Select AbosluteDates from Calendar where lenth = 9 would give me the following results if i had the same data as above. 

AbsoluteDates
2005-12-16 00:00:00.000
2005-12-17 00:00:00.000
2005-12-18 00:00:00.000
NotValid
NotValid
NotValid
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1 Answer

  1. Editorial Team

    You can cast to varchar then a datetime like this and then back to a varchar:

    SELECT CASE WHEN LEN(DateNumber) = 8 AND ISDATE(RTRIM(DateNumber)) = 1
    THEN CONVERT(nvarchar(25), 
        CAST(CAST(DateNumber as varchar(10)) as datetime), 121)
    ELSE 'NotValid' 
    END AS Result
FROM (
    SELECT 20051216 AS DateNumber
    UNION SELECT 20051217
    UNION SELECT 20051218
    UNION SELECT 10000
    UNION SELECT 90
    UNION SELECT 600
    UNION SELECT 99421946
) MySubQuery
ORDER BY Result

    Just replace the hard-coded search with your actual data table

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