spice

[b]//创建表空间[/b] copy scott 表空间内容conn sys/sys as sysdba;--以dba角色登入数据库drop user nancy casecade;--删除用户名为nancy的所有相关信息[color=red]创建新用户,并把scott的表空间信息给这个新用户[/color]1)backup scott [b]备份数据[/b]命令:ex...

[b]How to Drop a Database Table Only If It Already Exists[/b]1. MySQL was kind enough to make it very straightforward to drop an existing table. To drop the unfortunately-named table 'Drop_Me', run ...