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

sqlÃæÊÔ

1.Ò»µÀSQLÓï¾äÃæÊÔÌ⣬¹ØÓÚgroup by
±íÄÚÈÝ£º
2005-05-09 ʤ
2005-05-09 ʤ
2005-05-09 ¸º
2005-05-09 ¸º
2005-05-10 ʤ
2005-05-10 ¸º
2005-05-10 ¸º
Èç¹ûÒªÉú³ÉÏÂÁнá¹û, ¸ÃÈçºÎдsqlÓï¾ä?
            ʤ ¸º
2005-05-09 2 2
2005-05-10 1 2
------------------------------------------
create table #tmp(rq varchar(10),shengfu nchar(1))
insert into #tmp values('2005-05-09','ʤ')
insert into #tmp values('2005-05-09','ʤ')
insert into #tmp values('2005-05-09','¸º')
insert into #tmp values('2005-05-09','¸º')
insert into #tmp values('2005-05-10','ʤ')
insert into #tmp values('2005-05-10','¸º')
insert into #tmp values('2005-05-10','¸º')
1)select rq, sum(case when shengfu='ʤ' then 1 else 0 end)'ʤ',sum(case when shengfu='¸º' then 1 else 0 end)'¸º' from #tmp group by rq
2) select N.rq,N.勝,M.負 from (
select rq,勝=count(*) from #tmp where shengfu='ʤ'group by rq)N inner join
(select rq,負=count(*) from #tmp where shengfu='¸º'group by rq)M on N.rq=M.rq
3)select a.col001,a.a1 ʤ,b.b1 ¸º from
(select col001,count(col001) a1 from temp1 where col002='ʤ' group by col001) a,
(select col001,count(col001) b1 from temp1 where col002='¸º' group by col001) b
where a.col001=b.col001
2.Çë½ÌÒ»¸öÃæÊÔÖÐÓöµ½µÄSQLÓï¾äµÄ²éѯÎÊÌâ
±íÖÐÓÐA B CÈýÁÐ,ÓÃSQLÓï¾äʵÏÖ£ºµ±AÁдóÓÚBÁÐʱѡÔñAÁзñÔòÑ¡ÔñBÁУ¬µ±BÁдóÓÚCÁÐʱѡÔñBÁзñÔòÑ¡ÔñCÁС£
------------------------------------------
select (case when a>b then a else b end ),
(case when b>c then b esle c end)
from table_name
3.ÃæÊÔÌ⣺һ¸öÈÕÆÚÅжϵÄsqlÓï¾ä£¿
ÇëÈ¡³ötb_send±íÖÐÈÕÆÚ(SendTime×Ö¶Î)Ϊµ±ÌìµÄËùÓмǼ?(SendTime×Ö¶ÎΪdatetimeÐÍ£¬°üº¬ÈÕÆÚÓëʱ¼ä)
------------------------------------------
select * from tb where datediff(dd,SendTime,getdate())=0
4.ÓÐÒ»ÕÅ±í£¬ÀïÃæÓÐ3¸ö×ֶΣºÓïÎÄ£¬Êýѧ£¬Ó¢Óï¡£ÆäÖÐÓÐ3Ìõ¼Ç¼·Ö±ð±íʾÓïÎÄ70·Ö£¬Êýѧ80·Ö£¬Ó¢Óï58·Ö£¬ÇëÓÃÒ»ÌõsqlÓï¾ä²éѯ³öÕâÈýÌõ¼Ç¼²¢°´ÒÔÏÂÌõ¼þÏÔʾ³öÀ´£¨²¢Ð´³öÄúµÄ˼·£©£º 
  ´óÓÚ»òµÈÓÚ80±íʾÓÅÐ㣬´óÓÚ»òµÈÓÚ60±íʾ¼°¸ñ£¬Ð¡Ó


Ïà¹ØÎĵµ£º

SQL SERVER 2005 ͬ²½¸´ÖƼ¼Êõ

SQL SERVER 2005 ͬ²½¸´ÖƼ¼Êõ
ÒÔÏÂʵÏÖ¸´ÖƲ½Ö裨ÒÔ¿ìÕÕ¸´ÖÆÎªÀý£©
ÔËÐÐÆ½Ì¨SQL SERVER 2005
Ò»¡¢×¼±¸¹¤×÷£º
1£®½¨Á¢Ò»¸ö WINDOWS Óû§£¬ÉèÖÃΪ¹ÜÀíԱȨÏÞ£¬²¢ÉèÖÃÃÜÂ룬×÷Ϊ·¢²¼¿ìÕÕÎļþµÄÓÐЧ·ÃÎÊÓû§¡£
2£®ÔÚSQL SERVERÏÂʵÏÖ·¢²¼·þÎñÆ÷ºÍ¶©ÔÄ·þÎñÆ÷µÄͨÐÅÕý³££¨¼´¿ÉÒÔ»¥·Ã£©¡£´ò¿ª1433¶Ë¿Ú£¬ÔÚ·À»ðǽÖÐÉèÌØÀ ......

ÓÃSQLÓï¾ä¶Ï¿ªÄ³¸öÊý¾Ý¿âµÄËùÓлÁ¬½Ó

use master
go
if exists(select * from dbo.sysobjects where id = object_id(N'[dbo].[P_KillConnections]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[P_KillConnections]
GO
create proc P_KillConnections
@dbname varchar(200)
as
declare @sql nvarchar(500)
declare @spid nvar ......

SQL Server 2005ºÍSQL Server 2000Êý¾ÝµÄÏ໥µ¼Èë

¡¡×Ô´ÓSQL Server 2005ÍÆ³öºó£¬ÒòΪÓÐÁ˸üºÃµÄÐÔÄÜ£¬ËùÒÔÓкܶàÓëSQL Server 2000Ïà¹ØµÄÓ¦ÓóÌÐòÐèÒªÉý¼¶µ½Õâ¸ö°æ±¾¡£µ«ÈçºÎ²ÅÄÜÒÔ×î¿ì×î·½±ãµÄ·½Ê½°ÑÆäÖеıí½á¹¹¼°¶ÔÓ¦µÄÊý¾ÝºÍÊý¾ÝµÄÆäËüµÄ¸ñʽµ¼Èëµ½SQL Server 2005ÄØ£¿SQL Server 2005µÄÊý¾ÝÓÖÈçºÎµ¼Èëµ½SQL Server 2000ÉÏ£¿ÎÒÃÇ·Ö±ðÀ´¿´ÏÂÃæÊµÏֵķ½Ê½£º
¡¡¡¡1) SQL ......

SQL¿ç·þÎñÆ÷²éѯ

[SQL SERVER] ¿ç·þÎñÆ÷²éѯ
[SQL SERVER] ¿ç·þÎñÆ÷²éѯ
·½·¨Ò»:
ÓÃOPENDATASOURCE
ÏÂÃæÊǸö¿çSQLServer²éѯµÄʾÀý
Select TableA.*,TableB.* from OPENDATASOURCE(
         'SQLOLEDB',
         'Data Source=ServerA;User ID ......

sql ¸üÐÂÓï¾ä ¹ØÁªÁ½Õűí

sql Á½±í¹ØÁª ¸üР
update set from Óï¾ä¸ñʽ 
SybaseºÍSQL SERVER£ºUPDATE...SET...from...WHERE...µÄÓï·¨£¬Êµ¼ÊÉÏ´ÓÔ´±í»ñÈ¡¸üÐÂÊý¾Ý¡£ 
ÔÚ SQL ÖУº 
Update A SET A.dept =B.name 
from A LEFT JOIN B ON B.ID=A.dept_ID  ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ