Question

My table has two columns – col1 (int, null) and col2 (int, null) which I want to be able update with an empty values or null statement.

My code looks like:

            $newkeylimit = $allkeylimits[$row['Group_ID']];
            if($newkeylimit == ''){ $newkeylimit = NULL ; }

            $newproflimit = $allproflimits[$row['Group_ID']];                               
            if($newproflimit == ''){ $newproflimit = NULL ; }

            $sql = "UPDATE ".$mssql_table_prefix."Groups SET Group_Name = '".$newgroupname."', col1 = '".$newkeylimit."', col2 = '".$newproflimit."' WHERE Group_ID = '".$row['Group_ID']."'";
            $result = mssql_query($sql)
                or die( "<strong>ERROR: Group update query failed</strong>" );

After code execution I’m getting 0 in each column where suppose to be an empty value or NULL. Default values for col1 and col2 are set to NULL.

Any idea what I’m doing wrong? Thanks

Answer 1

You are passing a string instead of NULL to the server. Get rid of the apostrophes (‘) for col1 and col2.