031 % 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% D8% A F% D9%85% D8% A C % D8% A8% D8% A7% D8% B3% D8% A A% D8% A E% D8% A F% D8% A7% D9%85 Union Union All 3