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ASM磁盘组删除磁盘 [oracle@dbserver1 ~]$ su - gridsqlplus / as sysasmConnected.SQL> alter diskgroup data drop disk data_0001;Diskgroup altered.SQL> select dis 阅读全文
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创建只读用户:grant connect to user; grant create session to user; 1.创建角色 CREATE ROLE SELECT_ROLE 2.给角色分配权限 grant SELECT ANY DICTIONARY to SELECT_ROLE; grant 阅读全文
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MySQL的性能指标计算和优化方法1 QPS计算(每秒查询数) 针对MyISAM引擎为主的DB mysql> show global status like 'questions';+ + +| Variable_name | Value |+ + +| Questions | 2805815665 阅读全文
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mysql> show variables like '%secure%';+ + +| Variable_name | Value |+ + +| secure_auth | ON || secure_file_priv | /data/var-3307 |+ + +2 rows in set ( 阅读全文
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Oracle Flashback Transaction Query with Oracle Flashback Version Query In this example, a database administrator does this: Now emp and dept have one 阅读全文
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Oracle Flashback Database To use the FLASHBACK DATABASE command to return your database contents to points in time within the flashback window, your d 阅读全文
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The following list summarizes the user privileges required for the operations related to Flashback Drop and the recycle bin: DROP Any user with DROP p 阅读全文