Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQL ´óÈ« ÐÄÓêÖ®¼Ò

1.°´ÐÕÊϱʻ­ÅÅÐò:
Select * from TableName Order By CustomerName Collate Chinese_PRC_Stroke_ci_as
2.Êý¾Ý¿â¼ÓÃÜ:
select encrypt('ԭʼÃÜÂë')
select pwdencrypt('ԭʼÃÜÂë')
select pwdcompare('ԭʼÃÜÂë','¼ÓÃܺóÃÜÂë') = 1--Ïàͬ£»·ñÔò²»Ïàͬ encrypt('ԭʼÃÜÂë')
select pwdencrypt('ԭʼÃÜÂë')
select pwdcompare('ԭʼÃÜÂë','¼ÓÃܺóÃÜÂë') = 1--Ïàͬ£»·ñÔò²»Ïàͬ
3.È¡»Ø±íÖÐ×Ö¶Î:
declare @list varchar(1000),@sql nvarchar(1000)
select @list=@list+','+b.name from sysobjects a,syscolumns b where a.id=b.id and a.name='±íA'
set @sql='select '+right(@list,len(@list)-1)+' from ±íA'
exec (@sql)
4.²é¿´Ó²ÅÌ·ÖÇø:
EXEC master..xp_fixeddrives
5.±È½ÏA,B±íÊÇ·ñÏàµÈ:
if (select checksum_agg(binary_checksum(*)) from A)
    =
   (select checksum_agg(binary_checksum(*)) from B)
print 'ÏàµÈ'
else
print '²»ÏàµÈ'
6.ɱµôËùÓеÄʼþ̽²ìÆ÷½ø³Ì:
DECLARE hcforeach CURSOR GLOBAL FOR SELECT 'kill '+RTRIM(spid) from master.dbo.sysprocesses
WHERE program_name IN('SQL profiler',N'SQL ʼþ̽²éÆ÷')
EXEC sp_msforeach_worker '?'
7.¼Ç¼ËÑË÷:
¿ªÍ·µ½NÌõ¼Ç¼
Select Top N * from ±í
-------------------------------
Nµ½MÌõ¼Ç¼(ÒªÓÐÖ÷Ë÷ÒýID)
Select Top M-N * from ±í Where ID in (Select Top M ID from ±í) Order by ID  Desc
----------------------------------
Nµ½½áβ¼Ç¼
Select Top N * from ±í Order by ID Desc
8.ÈçºÎÐÞ¸ÄÊý¾Ý¿âµÄÃû³Æ:
sp_renamedb 'old_name', 'new_name' 
9£º»ñÈ¡µ±Ç°Êý¾Ý¿âÖеÄËùÓÐÓû§±í
select Name from sysobjects where xtype='u' and status>=0
10£º»ñȡijһ¸ö±íµÄËùÓÐ×Ö¶Î
select name from syscolumns where id=object_id('±íÃû')
11£º²é¿´Óëijһ¸ö±íÏà¹ØµÄÊÓͼ¡¢´æ´¢¹ý³Ì¡¢º¯Êý
select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%±íÃû%'
12£º²é¿´µ±Ç°Êý¾Ý¿âÖÐËùÓд洢¹ý³Ì
select name as ´æ´¢¹ý³ÌÃû³Æ from sysobjects where xtype='P'
13£º²éѯÓû§´´½¨µÄËùÓÐÊý¾Ý¿â
select * from master..sysdatabases D where sid not in(select sid from master..syslogins where name='sa')
»òÕß
select dbid, name AS DB_NAME from master..sysdatabase


Ïà¹ØÎĵµ£º

ÈýÖÖSQL·ÖÒ³·¨

±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£º 
SELECT TOP Ò³¼Ç¼ÊýÁ¿ *
from ±íÃû
WHERE (ID NOT IN
  (SELECT TOP (ÿҳÐÐÊý*(Ò³Êý-1)) ID
  from ±íÃû
  ORDER BY ID))
  ORDER BY ID
//×Ô¼º»¹¿ÉÒÔ¼ÓÉÏһЩ²éѯ ......

SQL ServerºÍOracleµÄ³£Óú¯Êý¶Ô±È

---------Êýѧº¯Êý
1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È¡Õû£¨½ØÈ¡£©
S:select cast(-1.002 as int) v ......

SQLÓï¾ä ÁªºÏ²éѯ»¹ÊÇÔÚ²éѯ½á¹ûÖÐǶÌ×

TABLE MASTER   ×Ö¶Î ID DETAIL.....
TABLE BIZ   ×Ö¶Î SYS_ID  CODE_ID .......
²éѯʱÐèÒªµÄÊÇIDµÄÃèÊö
1,SELECT A.SYS_ID,A.CODE_ID,B.DETAIL,C.DETAIL...... from BIZ A,MASTER B,MASTER C WHERE A.SYS_ID=B.ID AND A.CODE_ID=C.ID
2,SELECT SYS_ID,(SELECT DETAIL from MASTER ......

SQL×Ö·û´®´¦Àíº¯Êý´óÈ«

selectÓï¾äÖÐÖ»ÄÜʹÓÃsqlº¯Êý¶Ô×ֶνøÐвÙ×÷£¨Á´½Ósql server£©£¬
select ×Ö¶Î1 from ±í1 where ×Ö¶Î1.IndexOf("ÔÆ")=1;
ÕâÌõÓï¾ä²»¶ÔµÄÔ­ÒòÊÇindexof£¨£©º¯Êý²»ÊÇsqlº¯Êý£¬¸Ä³Ésql¶ÔÓ¦µÄº¯Êý¾Í¿ÉÒÔÁË¡£
left£¨£©ÊÇsqlº¯Êý¡£
select ×Ö¶Î1 from ±í1 where charindex£¨'ÔÆ',×Ö¶Î1£©=1;
×Ö·û´®º¯Êý¶Ô¶þ½øÖÆÊý¾Ý¡¢×Ö·û´®º ......

sqlÓï¾ä²éѯ±íµÄ×Ö¶ÎÃû

select name from syscolumns where id in (select id from sysobjects where type = 'u' and name = 'ÏàÓ¦±íÃû')  
ÓÃÒÔÉÏsqlÓï¾äÊäÈëÏàÓ¦±íÃû¾Í¿ÉÒԲ鵽±íµÄ×Ö¶ÎÃû£¬¶ÔÓ¦ºÃÊý¾Ý¿â ²éѯÊÇ·ñ´æÔڸñíÓï¾ä
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[tb_cost]') and OBJECTPROPER ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ