mr_mouse的专栏

NO1.A  pl/sql block consists of four distinct section:     1.block header :the optional block identifies a block name or type,if omitted,the block will be considered an anonymous block with no name...

NO1. The general struture of execution section is :  NO2.expresstion:         PL/SQL exceptions consists of one or more PL/SQL variables conbined one or more PL/SQL operators .An exception may app...