I got the wright answer because I knew that a char(50) would return 50, so thanks for the easy choice 🙂

My question now is: how someone know that "When omitting the size of either char or varchar, the default size is 30 for both" ? Where can I find this type of information because I looked on the help pages for "data type" and I found nothing about default size...

Oups! ok.. Found it! I should have read the remark...