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Asked: 2026-06-13T16:32:10+00:00

I have a huge database in ms sql. I have a date stored into

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I have a huge database in ms sql. I have a date stored into a field of type: VARCHAR2
I have the code, but it can’t compare dates. What I mean? There is an input with a launch date. What I need is to get the launchdate inputs where the launchdate is bigger than a date and smaller than another. The problem is that when I change the year from 2012 to 2013 there are no results. Also when I have dates with 0 (like 01.01.2012) it can’t compire them.

What I have so far is:

edited

Can someone help me to get the correct results?

EDIT1

The date is stored as string in this format: yyyy-mm-dd

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1 Answer

  1. Editorial Team

    In your WHERE clause you are doing a double conversion unnecessarily and actually comparing VARCHAR not DATETIME

    To compare DATETIME following is enough.

    CONVERT(DATETIME, p11.pa_value,104) >= CONVERT(DATETIME, '01.01.2012',104)

    Or you can CAST

    CAST(p11.pa_value AS DATETIME) >= CAST('01.01.2012' AS DATETIME)

    EDIT: I think you need to check for NULL values of [t].PA_NAME as well

    ISNULL([t].PA_NAME,'') = 'yourString'  --if you need filter null PA_NAME
ISNULL([t].PA_NAME,'yourString') = 'yourString' --if you need to bring null PA_NAME
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