RMAN 'Duplicate From Active Database' Feature in Oracle11g (Doc ID 452868.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 11.1.0.6 and laterOracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Express Clou…
什么是序列?在mysql中有一个主键自动增长的id,例如:uid number primary key auto_increment;在oracle中序列就是类似于主键自动增长,两者功能是一样的,只是叫法不同而已. 在oracle中想要实现id自动增长只能用序列来实现.在oracle中,是将序列装入内存,可以提高访问效率. 1.)序列的创建 create sequence 序列名称 increment by n 每次增长多少 //系统默认值为1. start with n从几开始 //系统默认…
create or replace trigger t before update on test5 for each rowbegin insert into test55 values (:old.id,:old.name);end ; -------------------------------------------------------------------------------------- --表中插入数据时ID自动增长 create table ttt (id numbe…
① create table p_user( id number(10) not null primary key, name varchar2(30), password varchar2(20), age number(10) ); ② create sequence p_user_Sequence increment by 1 start with 1 nomaxvalue nocycle cac…
),age )) create or replace trigger gger_tt before insert on ttt for each row when (new.id is null) begin select ttt_sequence.nextval into :new.id from dual; end;…
1.创建序列create sequence sequence_userinfo start with 1 increment by 1 minvalue 1 maxvalue 999999 nocycle nocache noorder;2.创建触发器create or replace trigger userinfo_triggerbefore insert on userinfofor each row begin select sequence_userinfo.nextval into:…
Oracle创建用户并给用户授权查询指定表或视图的权限用sys账户登录数据库进行如下操作: CREATE USER NORTHBOUND IDENTIFIED BY NORTHBOUND DEFAULT TABLESPACE "TBS_DNINMSV31" TEMPORARY TABLESPACE "TEMP2" QUOTA UNLIMITED ON "TBS_DNINMSV31"; GRANT "CONNECT" TO NO…
sql server在导入数据的时候,有时候要考虑id不变,就要先取消自动增长再导入数据,导完后恢复自增. 比如网站改版从旧数据库导入新数据库,数据库结构不相同,可能会使用insert into xx select ..from yy的语句导入数据. 每次都在sql studio里面手动修改太麻烦,不如写两个语句来的方便,将语法记录下来,所谓好记性不如烂笔头,一面日后又忘记了: SET IDENTITY_INSERT 允许将显式值插入表的标识列中. 语法 SET IDENTITY_INSERT…
