通过PL/SQL连接Oracle数据库有多种方式，本文选用最经典的一种：PL/SQL工具经由Oracle客户端与Oracle服务端（即数据库服务器 ...

Oracle’s PL/SQL language has two basic mechanisms for getting data from the database: SELECT and cursors. SELECT is designed to return a single row into local variables; cursors give you the ability ...