摘要：
1 public bool mysql() 2 { 3 conn.Open(); 4 SqlTransaction mytran = conn.BeginTransaction();//形如数据事务 5 SqlCommand cmd; 6 try 7 ... 阅读全文
摘要：
1 string sql = " IF EXISTS(SELECT * FROM ****** WHERE ****** ) "; 2 sql += " BEGIN "; 3 sql += " UPDATE ***** SET ***** WHERE **** "; 4 sql += " END ELSE B... 阅读全文