007 % D9%82% D9%88% D8% A7% D8% B9% D8% A F % D8% A8% D9%8 A% D8% A7% D9%86% D8% A7% D8% A A Mysql % D8% A8% D8% A7% D9%84% D8% B9% D8% B1% D8% A8% D9%8 A %7 C % D8% A7% D9%84% D9%82% D9%8 A% D9%88% D8% A F Mysql Constraints 3