SQL²Ù×÷È«¼¯
SQL²Ù×÷È«¼¯
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop
database dbname
3¡¢ËµÃ÷£º±¸·Ýsql server
--- ´´½¨ ±¸·ÝÊý¾ÝµÄ device
USE master
EXEC sp_addumpdevice 'disk', 'testBack',
'c:\mssql7backup\MyNwind_1.dat'
--- ¿ªÊ¼ ±¸·Ý
BACKUP DATABASE pubs
TO testBack
4¡¢ËµÃ÷£º´´½¨Ð±í
create table tabname(col1 type1 [not
null] [primary key],col2 type2 [not null],..)
¸ù¾ÝÒÑÓÐµÄ±í´´½¨ÐÂ±í£º
A£ºcreate table tab_new like tab_old (ʹÓÃ¾É±í´´½¨Ð±í)
B£ºcreate table
tab_new as select col1,col2… from tab_old definition only
5¡¢ËµÃ÷£ºÉ¾³ýбídrop table tabname
6¡¢ËµÃ÷£ºÔö¼ÓÒ»¸öÁÐ
Alter table tabname
add column col type
×¢£ºÁÐÔö¼Óºó½«²»ÄÜɾ³ý¡£DB2ÖÐÁмÓÉϺóÊý¾ÝÀàÐÍÒ²²»Äܸı䣬ΨһÄܸıäµÄÊÇÔö¼ÓvarcharÀàÐ͵ij¤¶È¡£
7¡¢ËµÃ÷£ºÌí¼ÓÖ÷¼ü£º
Alter table tabname add primary key(col)
˵Ã÷£ºÉ¾³ýÖ÷¼ü£º Alter table
tabname drop primary key(col)
8¡¢ËµÃ÷£º´´½¨Ë÷Òý£ºcreate [unique] index
idxname on tabname(col….)
ɾ³ýË÷Òý£ºdrop index idxname
×¢£ºË÷ÒýÊDz»¿É¸ü¸ÄµÄ£¬Ïë¸ü¸Ä±ØÐëɾ³ýÖØÐ½¨¡£
9¡¢ËµÃ÷£º´´½¨ÊÓͼ£ºcreate view viewname as select
statement
ɾ³ýÊÓͼ£ºdrop view viewname
10¡¢ËµÃ÷£º¼¸¸ö¼òµ¥µÄ»ù±¾µÄsqlÓï¾ä
Ñ¡Ôñ£ºselect * from table1 where ·¶Î§
²åÈ룺insert into
table1(field1,field2) values(value1,value2)
ɾ³ý£ºdelete from table1
where ·¶Î§
¸üУºupdate table1 set field1=value1 where ·¶Î§
²éÕÒ£ºselect
* from table1 where field1 like ’%value1%’ ---likeµÄÓï·¨ºÜ¾«Ã²é×ÊÁÏ!
ÅÅÐò£ºselect * from table1 order by field1,field2 [desc]
×ÜÊý£ºselect
count * as totalcount from table1
ÇóºÍ£ºselect sum(field1) as sumvalue
from ta
Ïà¹ØÎĵµ£º
½ñÌìÒ»¸öÅóÓÑÎʵ½Õâ¸öÎÊÌ⣬ÆäʵºÜºÃ½â¾ö£º
declare @dbname varchar(50)
declare c_database cursor for
select name from master.dbo.sysdatabas ......
±ÜÃâSQL×¢ÈëµÄ·½·¨ÓÐÁ½ÖÖ£ºÒ»ÊÇËùÓеÄSQLÓï¾ä¶¼´æ·ÅÔÚ´æ´¢¹ý³ÌÖУ¬ÕâÑù²»µ«¿ÉÒÔ±ÜÃâSQL×¢È룬»¹ÄÜÌá¸ßһЩÐÔÄÜ£¬²¢ÇÒ´æ´¢¹ý³Ì¿ÉÒÔÓÉרÃŵÄÊý¾Ý¿â¹ÜÀíÔ±(DBA)±àдºÍ¼¯ÖйÜÀí£¨ÕâÖÖ×ö·¨ÎÒÔÚһЩ¹«Ë¾¼û¹ý£©£¬²»¹ýÕâÖÖ×ö·¨ÓÐʱºòÕë¶ÔÏàͬµÄ¼¸¸ö±íÓв»Í¬Ìõ¼þµÄ²éѯ£¬SQLÓï¾ä¿ÉÄܲ»Í¬£¬ÕâÑù¾Í»á±àд´óÁ¿µÄ´æ´¢¹ý³Ì£¬ËùÒÔÓÐÈËÌá³ ......
ÕâÁ½ÌìÑо¿ÁËSQL SERVERµÄ×Ö¶ÎÐÞ¸Ä.ÓÐһЩÐĵÃ,д³öÀ´ÎªÈÕºó²Î¿¼:
1,ɾ³ý×Ö¶Î: ALTER TABLE [tablename] DROP COLUMN [fieldname]
ɾ³ýµÄʱºò¸Ã×ֶαØÐëûÓб»ÈκÎÍâ¼üÒýÓÃ,ûÓÐÈκÎÔ¼Êø.
2,ɾ³ýÔ¼Êø: ALTER TABLE [tablename] DROP CONSTRAINT constraint_name
ɾ³ýÔ¼ÊøÊÇÔ¼ÊøÃû²»¿É¼Óµ¥ÒýºÅ.
3,Ôö¼ÓĬÈÏÖµÔ¼Êø: ALT ......
»ùÓÚmsdn ÏêϸѧϰT-SQL (http://msdn.microsoft.com/zh-cn/library/bb510741.aspx)
2. ½ñÌìÏÂÎçûʲôrun ·ÖÎö¡£¡£¡£ ¶ÔÕÕ×Åmsdn ¼òµ¥½Ì³Ì£¬³Ë»ú°Ñ»ù±¾µÄT-SQL Óï¾ä²Ù×÷Ò»±é(http://msdn.microsoft.com/zh-cn/library/ms365303.aspx)
Use master
Go
Create database dbname On&n ......