1、创建数据库

 

2、删除数据库

create database '数据库名'

drop database '数据库名'

3、备份sql server

--- 创建 备份数据的 device

USE master

EXEC sp_addumpdevice 'disk', 'testBack',  'c:\mssql7backup\MyNwind_1.dat'

--- 开始 备份

BACKUP DATABASE pubs TO testBack

4、创建新表

create table tabname(col1 type1 [not null] [primary key],col2 type2 [not null],..)

--根据已有的表创建新表:

--(使用旧表创建新表)

--方法一

create table tab_new like tab_old

--方法二(这个倒有个)

create table tab_new as select col1,col2 from tab_old definition only

5、删除新表

drop table tabname

6、增加一个列

Alter table tabname add column col type

7、添加主键: Alter table tabname add primary key(col)

删除主键: Alter table tabname drop primary key(col)

8、创建索引:create [unique] index idxname on tabname(col….)

删除索引:drop index idxname

注:索引是不可更改的,想更改必须删除重新建。

9、创建视图:create view viewname as select statement

删除视图:drop view viewname

10、几个简单的基本的sql语句

选择:select * from table1 where 范围

插入:insert into table1(field1,field2) values(value1,value2)

删除:delete from table1 where 范围

更新:update table1 set field1=value1 where 范围

查找:select * from table1 where field1 like ’%value1%’ ---like的语法很精妙,查资料!

排序:select * from table1 order by field1,field2 [desc]

总数:select count as totalcount from table1

求和:select sum(field1) as sumvalue from table1

平均:select avg(field1) as avgvalue from table1

最大:select max(field1) as maxvalue from table1

最小:select min(field1) as minvalue from table1

posted on 2014-01-08 12:43  异时空坐标  阅读(181)  评论(0编辑  收藏  举报