DB servers don't knows empty value. You can use .NULL. value and allow null values on table field in MySQL.

replace myschedule with NULL

MartinaJ

>how can I empty the date column?
>
>I use:
>

>replace myschedule with {--} 
>

>
>but get error when I use with MySQL database
>
>thanks for the help
>
>regards,
>
>Jerry