唐增辉的专栏

--------------------------------查询系统库中是否有库（有库就删除此库）----------------------------------------------------use masterif exists(select * from databases where name='库名')drop database 库名_____________

//连接Accesspublic  static Connection getConnection() { Connection con=null;  try {   //Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();      //con=(Connection) DriverManager.g

orale 已存在的表和 SEQUENCE 查询和删除