数据管理与权限控制命令提供了数据库对象所有者对对象权限的控制。GRANT命令用于授权用户权限,语法如下:GRANT privileges ON objectName TO username; 例如:SQL> GRANT select, update ON orderMaster TO warehouse; SQL> GRANT update(qtyHand, reLevel) ON itemfile TO warehouse; SQL> GRANT select ON vendorMaster TO accounts WITH GRANT OPTION; REVOKE命令用于撤销用户权限,语法如下:REVOKE privileges ON objectName FROM username; 例如:SQL> REVOKE select, update ON orderMaster FROM warehouse;