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