一组成员，拥有足够的授权来发出TRUNCATE table语句且拥有CREATE table语句权限。
Membership of a group that has sufficient authority to issue TRUNCATE TABLE statements and have CREATE TABLE statement privileges.
在备份和恢复方面，解决语句失败不需要管理员权限。
An administrator is not needed to solve a statement failure in terms of backup and recovery.
要撤消数据库级权限，使用revoke语句。
To revoke database level authorities, use the revoke statement.
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