安装Oracle数据库后，通常需借助第三方工具连接数据库用户，例如PL/SQL Developer。本文以sys用户为例，详细介绍如何使用PL/SQL ...

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 ...