调用函数时传入的参数值 The @entry form refers to the value of the parameter when the function was entered. This isn't always available, but sometimes it is -- there is a DWARF extension for it, and GCC emi
oracle同义词是什么意思? 相当于alias,比如把user1.table1 在user2中建一个同义词table1create synonym table1 for user1.table1;这样当我们在user2中查select * from table1 时就相当于查select * from user1.table1;在oracle中对用户的管理是使用权限的方式来管理的,也