使用Oracle分析函數隨機抽取N條記錄類比一個歌曲表,有歌曲ID和作者ID,並且初始化一些資料create table music( music_id int primary key, userid int);insert into music(music_id)select rownum rn from dual connect by level<1000;update music set userid=
WAS叢集系列(8):叢集搭建:步驟6:建立概要檔案,叢集概要(1)、主機解析地址修改WAS節點1、WAS節點2、資料庫伺服器下修改hosts檔案將所有主機的IP映射到各個hosts檔案中,舉例方法如下:例:WAS節點WINDOWS環境下WINDOWS修改:C:\Windows\System32\drivers\etc\hostsLINUX修改:[root@hyldbsoft]# vi /etc/hosts# Do notremove the following line, or
oracle bug 12415167,oracle12415167drop table t1;create table t1 (c1 char(2) primary key, c2 char(1) not null);insert into t1 values ('A ','A'); select t1.c1 from t1 where t1.c1 in (select c2 from t1 union all select '0'||c2 c2 from t1);select /*+
mysql 開啟遠程服務,mysql開啟進入mysqlserver如下:Enter password: ******Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 810Server version: 5.6.10 MySQL Community Server (GPL)Copyright (c) 2000, 2013, Oracle and/or its
Chapter 2 User Authentication, Authorization, and Security(9):防止登入名稱和使用者查看中繼資料,authentication原文出處:http://blog.csdn.net/dba_huangzj/article/details/39003679,專題目錄:http://blog.csdn.net/dba_huangzj/article/details/37906349
Chapter 2 User Authentication, Authorization, and Security(8):建立映射到登入名稱的資料庫使用者,authentication原文出處:http://blog.csdn.net/dba_huangzj/article/details/38944121,專題目錄:http://blog.csdn.net/dba_huangzj/article/details/37906349
跟蹤oracle中sql語句執行過程及相關知識拓展,oraclesqlselect * from v$sqlarea;select * from v$sqlarea where first_load_time>'2010-11-27/09:30:00'; 這個方法查詢結果每條記錄顯示一條查詢語句,且只能查詢sql_text小於1000字元的,多餘的會被截斷。