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Home/ Questions/Q 106197
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Asked: May 11, 20262026-05-11T01:33:31+00:00 2026-05-11T01:33:31+00:00

I am working on an old database I inherited from my predecessors. In it,

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I am working on an old database I inherited from my predecessors.

In it, some float fields contains NaN where there should be a null.

The following SQL doesn’t work because it doesn’t recognize NaN.

UPDATE xxx SET column= null WHERE column=NaN 

How can I do this?

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  1. 2026-05-11T01:33:32+00:00Added an answer on May 11, 2026 at 1:33 am

    Try

    UPDATE xxx SET column= null WHERE IsNumeric(column)=0 

    Then run your select again.

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