NAME

ALTER GROUP - 修改一個(gè)用戶組

SYNOPSIS

ALTER GROUP groupname ADD USER username [, ... ]
ALTER GROUP groupname DROP USER username [, ... ]

ALTER GROUP groupname RENAME TO newname

DESCRIPTION 描述

ALTER GROUP 用于修改一個(gè)用戶組。 頭兩個(gè)形式從組中增加或者刪除用戶。 只有數(shù)據(jù)庫(kù)超級(jí)用戶才能使用這條命令。向組中增加用戶并不創(chuàng)建用戶。 同樣從組中刪除用戶也不刪除用戶本身。

 第三種變體修改一個(gè)組的名字。只有數(shù)據(jù)庫(kù)超級(jí)用戶可以重命名組。  

PARAMETERS 參數(shù)

groupname

 要更改的組名稱(chēng)。

username

 準(zhǔn)備向組中增加或從組中刪除的用戶名。用戶名必須已經(jīng)存在。

newname

 組的新名字。

EXAMPLES 例子

 向組中增加用戶：

ALTER GROUP staff ADD USER karl, john;

 從組中刪除用戶：

ALTER GROUP workers DROP USER beth;

COMPATIBILITY 兼容性

SQL 標(biāo)準(zhǔn)里沒(méi)有 ALTER GROUP 語(yǔ)句。角色（roles）的概念與之類(lèi)似。  

SEE ALSO 參見(jiàn)

CREATE GROUP [create_group(7)], DROP GROUP [drop_group(l)]

#p#

NAME

ALTER GROUP - change a user group

SYNOPSIS

ALTER GROUP groupname ADD USER username [, ... ]
ALTER GROUP groupname DROP USER username [, ... ]

ALTER GROUP groupname RENAME TO newname

DESCRIPTION

ALTER GROUP is used to change a user group. The first two variants add or remove users from a group. Only database superusers can use this command. Adding a user to a group does not create the user. Similarly, removing a user from a group does not drop the user itself.

The third variant changes the name of the group. Only a database superuser can rename groups.  

PARAMETERS

groupname

The name of the group to modify.

username

Users which are to be added or removed from the group. The users must exist.

newname

The new name of the group.

EXAMPLES

Add users to a group:

ALTER GROUP staff ADD USER karl, john;

Remove a user from a group:

ALTER GROUP workers DROP USER beth;

COMPATIBILITY

There is no ALTER GROUP statement in the SQL standard. The concept of roles is similar.  

SEE ALSO

CREATE GROUP [create_group(7)], DROP GROUP [drop_group(l)]