NAME
ALTER GROUP - 修改一个用户组
SYNOPSIS
ALTER GROUP groupname ADD USER username [, ... ] ALTER GROUP groupname DROP USER username [, ... ] ALTER GROUP groupname RENAME TO newname
DESCRIPTION 描述
ALTER GROUP 用于修改一个用户组。 头两个形式从组中增加或者删除用户。 只有数据库超级用户才能使用这条命令。向组中增加用户并不创建用户。 同样从组中删除用户也不删除用户本身。
第三种变体修改一个组的名字。只有数据库超级用户可以重命名组。
PARAMETERS 参数
- groupname
要更改的组名称。- username
准备向组中增加或从组中删除的用户名。用户名必须已经存在。- newname
组的新名字。
EXAMPLES 例子
向组中增加用户：
ALTER GROUP staff ADD USER karl, john;
从组中删除用户：
ALTER GROUP workers DROP USER beth;
COMPATIBILITY 兼容性
SQL 标准里没有 ALTER GROUP 语句。角色（roles）的概念与之类似。
SEE ALSO 参见
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)]
