RMAN> startup nomount;RMAN> sql 'alter session set nls_date_format=''yyyy-mm-dd hh24:mi:ss''";--因為rman預設以環境變數來讀取時間格式,與sqlplus的固定格式不同,所以,此處要設定時間格式變數。RMAN> restore controlfile from autobackup until time '2009-03-10
一.問題說明 安裝環境:Oracle linux 6.1 資料庫: 10.2.0.1 安裝Oracle 10g的RAC,在第一個節點執行root.sh 時報錯,如下: [root@rac1 ~]# /u01/app/10.2.0/grid/root.shWARNING: directory '/u01/app/10.2.0' is notowned by rootWARNING: directory '/u01/app' is not ownedby rootWARNING:
Do Patchset Updates (PSU's) Change the Oracle Release Version/Fifth Digit? [ID 861152.1] Modified 08-SEP-2011 Type HOWTO Status PUBLISHED In this Document Goal Solution ReferencesApplies to:OracleServer - Enterprise Edition - Version: 10
1、只複製表結構 的sqlcreate table tableName2 as select * from tableName1 where 1<>1 2、即複製表結構又複製表中資料 的sqlcreate table tableName2 as select * from tableName1 3、Oracle複製表的制定欄位 的sqlcreate table tableName2 as select row_id,name,age from tableName1 where 1&
背景:排序時候對NULL值的處理,在Oracle官方文檔中說明,null值在排序過程是個比較特殊的實值型別,預設情況下排序時把它看成了最大值了,也就是說在排序的時候,當排序的記錄中出現了Null值,預設是,升序排列在最後,反過來在最前,那麼也可以程式自己來定義它前後。1、排在最前:select xx from student order by xx nulls first;2、排在最後select xx from student order by xx nulls last;然後就搞定了!
alter user scott account unlock; --解鎖scott使用者select * from scott.emp where to_char(hiredate,'yyyy-mm-dd')>'1982-1-1'; --日期比較select * from scott.emp where to_char(hiredate,'yyyy')='1980'; -- 入職時間年份為1980select * from scott.emp where