ORacle语句
MYSQL/MSSQL/ORACLE数据库脚本代码 收藏
/******************************************************************************/
/*
主流数据库MYSQL/MSSQL/ORACLE测试数据库脚本代码
脚本任务:建立4个表,添加主键,外键,插入数据,建立视图
运行环境1:microsoft sqlserver 2000 查询分析器
运行环境2:mysql5.0 phpMyAdmin网页界面
运行环境3:oracle 9i SQL*PLUS命令行界面
author:chinayaosir
blog: http://blog.csdn.net/chinayaosir/
QQ: 44633197
声明:严禁其它网站不经过作者chinayaosir同意任意转载
*/
/******************************************************************************/
/*script test ok with microsoft sqlserver 2000 查询分析器 */
/******************************************************************************/
/*DB:MSSQL2000 SCRIPT*/
/*0.drop table list*/
drop table Employee;
drop table Department;
drop table Post;
drop table Account;
/*********************************************************/
/*DB:MSSQL2000 SCRIPT*/
/*1.create all table*/
create table Account(
oid int not null,
username varchar(30) not null,
password varchar(10) null,
invalid varchar(1) null
);
create table bab.Post(
/*oid int identity(1,1) not null primary key,*/
oid int not null,
postName varchar(30) not null
);
create table Department(
oid int not null,
deptName varchar(30) not null,
parentid int null,
manager varchar(30) null,
email varchar(30) null
);
create
相关文档:
SELECT trim(NAME) ||' '|| VALUE from v$parameter
WHERE NAME IN ('sga_max_size','db_cache_size','shared_pool_size',
'shared_pool_reserved_size','large_pool_size','java_pool_size',
'db_block_size','db_block_buffers','log_buffer','sort_area_si ......
1. 复制表结构及其数据:
create table table_name_new as select * from table_name_old
2. 只复制表结构:
create table table_name_new as select * from table_name_old where 1=2;
或者:
create table table_name_new like table_name_old
3. 只复制表数据:
如果两个表结构一样:
insert into table_name_ ......
Introduction to Schema Objects
A schema is a collection of logical structures of data, or schema objects. A schema is owned by a database user and has the same name as that user. Each user owns a single schema. Schema objects can be created and manipulated with SQL and include the following types o ......
当我们获取数据时,可能会有这样的需求,即每次从表中获取数据时,是随机获取一定的记录,而不是每次都获取一样的数据,这时我们可以采取Oracle内部一些函数,来达到这样的目的.
1) select * from (select * from tablename order ......
ORACLE常用命令
一、ORACLE的启动和关闭
1、在单机环境下
要想启动或关闭ORACLE系统必须首先切换到ORACLE用户,如下
su - oracle
a、启动ORACLE系统
oracle>svrmgrl
SVRMGR>connect internal
SVRMGR>startup
SVRMGR>quit
b、关闭ORACLE系统
oracle>svrmgrl
SVRMGR>connect&nb ......