• - use decimal[(p[, s])]  check BOL in stead of float.

    - check constaints can help to delimit values :

       from BOL :

         ALTER TABLE doc_exd 

             ADD CONSTRAINT exd_check CHECK (column_a between -99 and +99)

          alter table dox_exd 

                ADD CONSTRAINT exd_check_precision CHECK (case column_a - cast(column_a as integer) when  0 then 1 when 0.5 then 1 else 0 end = 1)

    - u can also use a trigger to perform these tests

    test it

    Johan

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