Cannot open database "studying" requested by the login.
无法打开数据库“研究”登录所请求的。
When a standby database is open for read-only access, users can query the standby database but cannot update it.
当备库是以只读方式打开时，用户只能在备库上查询而不能更新它。
When a standby database is open for read-only access, users can query the standby database but cannot update it.
当备库是以只读方式打开时，用户只能在备库上查询而不能更新它。
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