How can I do the equivalent of:
!FIND_IN_SET('needle', haystack)
How can I do the equivalent of: !FIND_IN_SET(‘needle’, haystack)
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FIND_IN_SETreturns the index of the match if it is found, and returns 0 if it is not found. Since 0 is FALSE you can useNOT FIND_IN_SET('needle', haystack)