%TYPE 用在变量的声明里,用于取得表中的字段类型: %ROWTYPE 用于声明基于某个表的行类型: 示例: %ROWTYPE 使用 DECLARE CURSOR pdct_cur IS SELECT * FROM PRODUCTINFO; cur_prodcrd productinfo%ROWTYPE; BEGIN OPEN pdct_cur; FETCH pdct_cur INTO cur_prodrcd; DBMS_…
the default settings used by SQL Developer to convert data types from MySQL to Oracle. SQL Developer enables you to change the default setting for certain data types by specifying an alternative type. For information about changing the default data t…
One characteristic of an RDBMS is the independence of physical data storage from logical data structures. RDBMS的特点之一是物理数据与逻辑数据结构的独立性. Introduction to Schema Objects Schema Object Types Schema Object Storage Schema Object Dependencies SYS and SYSTEM S…