Reserved words usually only cause problems if you’re using them as field names, and in that case you need to wrap them with brackets (“[]”) to eliminate the problem. I will amost guarantee you that your PlateState has some garbage in it, so you need to either trim it first (LTRIM(RTRIM(PlateState)) = ‘IN’) or use Like ‘%IN%’ instead, and this will return the results you expect.
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solved Overcoming the reserved word “IN” in sql server [closed]