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Asked: 2026-05-10T21:49:48+00:00

I’d like to make an (MS)SQL query that returns something like this: Col1 Col2

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I’d like to make an (MS)SQL query that returns something like this:

Col1 Col2                  Col3 ---- --------------------- ------ AAA  18.92                 18.92 BBB  20.00                 40.00 AAA  30.84                 30.84 BBB  06.00                 12.00 AAA  30.84                 30.84 AAA  46.79                 46.79 AAA  86.40                 86.40

where Col3 is equal to Col2 when Col1 = AAA and Col3 is twice Col2 when Col1 = BBB. Can someone point me in the rigth direction please?

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1 Answer

  1. You didn’t mention what kind of database you’re using. Here’s something that will work in SQL Server:

    SELECT Col1, Col2,      CASE WHEN Col1='AAA' THEN Col2 WHEN Col1='BBB' THEN Col2*2 ELSE NULL END AS Col3 FROM ...
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