標籤:今天在網上看到一個朋友問:為什麼在ASM儲存管理的方式下明明只設定了log_archive_dest_1來指定歸檔的路徑,卻在ASM下發現了兩處歸檔記錄檔?(未開閃回) 我查了一些資料,認為是這樣的: Every file created in ASM gets a system-generated filename, otherwise known as a fully qualified filename (FQFN). The fully qualified filename
標籤:--選擇部門中30的僱員SELECT * from emp where DEPTNO=30;--列出所有辦事員的姓名、部門、編號--採用內串連方式,也就是等值連結,也是最常用的連結SELECT ename,empno,dname from emp e INNER JOINdept d on e.deptno=d.deptno where job=‘CLERK‘;--找出傭金高於薪金的僱員select * from emp where
標籤:oracle 隱式轉換 索引 都說Oracle存在NUMBER和VARCHAR2類型的隱式轉換,嚴格意義上需要避免,但為何需要避免,從下面的實驗進行驗證。1. 建立測試表和索引create table tn (id number, name varchar2(1));create index idx_tn on tn (id);create index idx_tn on
標籤:Oracle提示錯誤訊息ORA-28001: the password has expired在oracle伺服器上用sqlplus / as sysdba登入進去,可以通過下面的sql語句查看賬戶情況:select username,account_status from dba_users;找到對應的使用者名稱,如果狀態是是expired,則可以通過下面的命令來修改帳號密碼啟用賬戶:alter user USERNAME identified by NEWPASSWORD;完成命令後,
標籤: [[email protected] hub]$ cat /etc/oratab# # This file is used by ORACLE utilities. It is created by root.sh# and updated by either Database Configuration Assistant while creating# a database or ASM Configuration Assistant while
標籤:摘自:Requirements for Installing Oracle 11gR2 RDBMS on RHEL (and OEL) 5 on AMD64/EM64T (文檔 ID 880989.1)NOTE: Starting with Oracle Database 11g Release 2 (11.2.0.2), all the 32-bit packages, except for gcc-32bit-4.3, listed in the following sections
標籤:dblink的主要作用是兩個資料庫間的資料訪問(1)global_name查看select * from global_name;(2)查看本地的global_names參數 show parameter global_namesNAME TYPE VALUE------------------------------------ ----------- -----------------------------
標籤:In this Document Purpose Scope Details What does "split brain" mean? Why is this a problem? How does the clusterware resolve a "split brain" situation? Identifying a split-brain eviction Finding the
標籤:http://www.cnblogs.com/hxw/archive/2005/09/11/234619.html1.根據ROWID來分select * from t_xiaoxi where rowid in(select rid from (select rownum rn,rid from(select rowid rid,cid fromt_xiaoxi order by cid desc) where rownum<10000) where rn>9980