Just wanted to say Hello!

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TimothySarve
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Re: Just wanted to say Hello!

Post by TimothySarve » Fri May 20, 2022 10:14 am

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Category:Molecular biology
Category:Bioinformatics softwareQ:

SQL operator check with binary union

I have a SQL query below which works well if there is only one row in the first and the second tables. How can I add error checking for either of the tables to return o/p accordingly?
SELECT *
FROM (SELECT 'A' AS VALA, 1 AS VALB
UNION ALL SELECT 'B' AS VALA, 1 AS VALB) as DummyT
WHERE
"VALA" IN (1, 6add127376 jansax
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