• 闪回

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    select * from 表名 as of timestamp to_timestamp('2021-6-19 1:10:00','yyyy-mm-dd hh24:mi:ss');

  • 查询sql记录

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    select * from v$sql WHERE SQL_TEXT LIKE '%表名%' ORDER BY last_load_time DESC;

  • 自带视图

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    SELECT * FROM v$tempfile;
    SELECT * FROM dba_temp_files;

    SELECT * FROM v$sysstat;
    SELECT * FROM v$sort_usage;
    SELECT * FROM v$sort_segment;

  • 查约束

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    select *from user_constraints where CONSTRAINT_Name LIKE '%键名%'
    select *from user_cons_columns where CONSTRAINT_Name LIKE '%键名%'

  • 时间

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    SELECT SYSDATE  FROM dual;
    SELECT SYSTIMESTAMP FROM dual;

  • 锁表

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    -- 查看有没有表被锁住
    select * from v$locked_object;

    -- 查询锁表的详细信息
    select sess.sid,sess.serial#,lo.oracle_username,
    lo.os_user_name,ao.object_name,lo.locked_mode
    from v$locked_object lo, dba_objects ao, v$session sess, v$process p
    where ao.object_id = lo.object_id and lo.session_id = sess.sid;

    -- 结束掉锁住的表
    alter system kill session 'sid,serial#';

  • s