SQL¸½¼ÓÊý¾Ý¿âºó,Êý¾Ý¿âÊÇÖ»¶ÁµÄ
·½·¨Ò»
1.н¨Ò»¸öͬÃûµÄÊý¾Ý¿â
2.ÔÙÍ£µôsql server(×¢Òâ²»Òª·ÖÀëÊý¾Ý¿â)
3.ÓÃÔÊý¾Ý¿âµÄÊý¾ÝÎļþ¸²¸ÇµôÕâ¸öн¨µÄÊý¾Ý¿â
4.ÔÙÖØÆôsql server
5.´Ëʱ´ò¿ªÆóÒµ¹ÜÀíÆ÷ʱ»á³öÏÖÖÃÒÉ£¬ÏȲ»¹Ü£¬Ö´ÐÐÏÂÃæµÄÓï¾ä£¨×¢ÒâÐÞ¸ÄÆäÖеÄÊý¾Ý¿âÃû)
6.Íê³ÉºóÒ»°ã¾Í¿ÉÒÔ·ÃÎÊÊý¾Ý¿âÖеÄÊý¾ÝÁË,Õâʱ,Êý¾Ý¿â±¾ÉíÒ»°ã»¹ÒªÎÊÌâ,½â¾ö°ì·¨ÊÇ,ÀûÓÃ
Êý¾Ý¿âµÄ½Å±¾´´½¨Ò»¸öеÄÊý¾Ý¿â,²¢½«Êý¾Ýµ¼½øÈ¥¾ÍÐÐÁË.
USE MASTER
GO
SP_CONFIGURE 'ALLOW UPDATES',1 RECONFIGURE WITH OVERRIDE
GO
UPDATE SYSDATABASES SET STATUS =32768 WHERE NAME='ÖÃÒɵÄÊý¾Ý¿âÃû'
Go
sp_dboption 'ÖÃÒɵÄÊý¾Ý¿âÃû', 'single user', 'true'
Go
DBCC CHECKDB('ÖÃÒɵÄÊý¾Ý¿âÃû')
Go
update sysdatabases set status =28 where name='ÖÃÒɵÄÊý¾Ý¿âÃû'
Go
sp_configure 'allow updates', 0 reconfigure with override
Go
sp_dboption 'ÖÃÒɵÄÊý¾Ý¿âÃû', 'single user', 'false'
Go
 
Ïà¹ØÎĵµ£º
1.×Ö·û´®º¯Êý
³¤¶ÈÓë·ÖÎöÓÃ
datalength(Char_expr) ·µ»Ø×Ö·û´®°üº¬×Ö·ûÊý,µ«²»°üº¬ºóÃæµÄ¿Õ¸ñ
substring(expression,start,length) ²»¶à˵ÁË,È¡×Ó´®
right(char_expr,int_expr) ·µ»Ø×Ö·û´®ÓÒ±ßint_expr¸ö×Ö·û
×Ö·û²Ù×÷Àà
upper(char_expr) תΪ´óÐ ......
²»Åç¿ÚË®!Ö±½ÓÉÏͼ
1.Êý¾Ý¿â¶ÔÏó¼ìË÷¹¦ÄÜ
2.T-SQLÓï·¨°ïÖú
3.³£Óú¯Êý°ïÖú(²»¶®ÄñÓï?13×Ô¼ºÁ·Á·°É!)
Download Now
°²×°Á÷³Ì:
1.ÏȰÑÍøÂçßDzæÁË(¶ÏÍø - -!!)
2.°ÑËùÓеÄSQL Server,VS¶¼¹ØÁË,ÔËÐÐSQLPrompt 4.0.exe°²×°
3.°²×°Íê±Ïºó,Í˳öRedGate.SQLPrompt.TrayApp ......
¼Ó[ ]ÓÃÓÚ¶¨½çÁÐÃû»ò±íÃûµÈÐÅÏ¢£¬ÒÔÇø±ðÒ»Ð©ÌØÊâµÄ²»ºÏÃüÃû¹æÔòµÄ×Ö´®£¬»òÊÇÓëϵͳ±£Áô×ÖÓгåÍ»¡£Èç"user"ÊÇSQL Server±£ÁôµÄ¹Ø¼ü×Ö£¬ËùÒÔÓÃ"select * from user"²éѯ»áÌáʾÓï·¨´íÎó¡£¼ÓÉÏÖÐÀ¨ºÅ£¬ÒÔÉùÃ÷Æä²»ÊDZ£Áô×Ö¡£ "select * from [user]" Èç¹û±íÃû²»Êǹؼü×Ö£¬ÈçCompany£¬ÔòÓÃ"select * from Company"ÊÇûÎÊÌâµÄ£¬²»Ó ......
1¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´ÅжÏ
select * from people
where peopleId in (select peopleId from people group by peopleId having count
(peopleId) >& ......