DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER函数来获取Oracle当前的SCN,之后再执行数据的修改操作 提示 如何获取Oracle数据库当前的SCN? 获取当前SCN的方式非常多,除了使用DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER函数外,也可以通过查询V$DATABASE视图中的CURRENT_SCN列获取。不过,不管是通过查询视图,或是通过过程获取,操作...
SQL>select open_mode,database_role,db_unique_name,flashback_on from v$database; OPEN_MODE DATABASE_ROLE DB_UNIQUE_NAME FLASHBACK_ON --- --- --- --- READ WRITE PRIMARY dg1 NO SQL>select open_mode,database_role,db_unique_name,flashback_on from v$database; OPEN_MODE DATABASE_ROLE ...
(SELECT * FROM employees AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '60' MINUTE) MINUS SELECT * FROM employees; 场景 CREATE TABLE flashback_query_test ( id NUMBER(10) ); SELECT current_scn, TO_CHAR(SYSTIMESTAMP, 'YYYY-MM-DD HH24:MI:SS') FROM v$database; CURRENT_SCN TO_CHAR(SYSTIME...
SELECT * FROM sales_external EXTERNAL MODIFY (LOCATION 'sales_9.csv’ REJECT LIMIT UNLIMITED);flashback_query_clause flashback_query_clauseを使用すると、データに関連付けられた時間ディメンションに基づいて、表、ビューまたはマテリアライズド・ビューからデータを取得できます。 この句...
ecidetoflashthedatabasebacktothetimewhentheschemaexisted.Whichviewwillyouquerytodeterminetheestimatedsizeoftheflashbackdatathatyourequireforyourcurrenttargetretention?() A.V$FLASHBACK_DATABASE_LOG B.V$FLASHBACK_DATABASE_STAT C.V$DATABASE D.V$UNDOSTAT 点击查看答案 ...
In addition, either you must have FLASHBACK object privilege on the objects in the select list, or you must have FLASHBACK ANY TABLE system privilege. Syntax select::= Description of the illustration select.eps (subquery::=, for_update_clause::=) ...
SQL>SELECT ADDR,PID,SPID FROM V$PROCESS WHERE ADDR= C000000084435AD8'; ADDR PID SPID --- C000000084435AD8 91 4835 b. 设置事件,以10046为例 sqlplus /nolog SQL>connect / as sysdba; SQL>oradebug setospid 4835 SQL>oradebug unlimit --不限制转储...