ISNUMERIC('07213E71') = True?

Question

SQL is detecting that the following string ISNUMERIC:

\'07213E71\'

I believe this is because the \'E\' is being classed as a mathmatical symbol.

Answer 1

I have encountered the same problem. IsNumeric accepts "$, €, +, -, etc" as valid inputs and Convert function throws errors because of this. Using "LIKE" SQL statement fixed my problem. I hope it'll help the others

SELECT UnitCode, UnitGUID, Convert(int, UnitCode) AS IntUnitCode
      FROM [NG_Data].[NG].[T_GLB_Unit]  
     WHERE ISNULL(UnitType,'') <>'Department'
       AND UnitCode NOT LIKE '%[^0-9]%'
  ORDER BY IntUnitCode

PS: don't blame me for using "UnitCode" as nvarchar :) It is an old project :)