Don't see anything obviously wrong with your query string. Are the inserts happening in the same block of code, i.e., are you sure that _$TimesheetID_ has a value in it when you're performing the second insert? -dave > I am using a form to Insert data into 2 tables in the same database. > $TimesheetID needs to be in each table. However, it is not being inserted > into the second table, "tblTimesheetDetails" . Any advise? > $result_timesheet=mysql_query("INSERT INTO tblTimesheet (TimesheetID, > WorkerID, ClientID, TimesheetDate, ProspectiveOrRetrospective) VALUES > ('$TimeSheetID','$WorkerID','$ClientID','$TimesheetDate','$ProspectiveOrRetr > ospective')")or die("Insert Error: ".mysql_error()); > $result_timesheetdetails=mysql_query("INSERT INTO tblTimesheetDetails > (TimesheetID, ActivityTypeID, TimeSpentHours, TimeSpentMinutes) VALUES > ('$TimeSheetID','$ActivityTypeID','$TimeSpentHours','$TimeSpentMinutes')")or > die("Insert Error: ".mysql_error());