Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ʵÏÖ¶àÐкϲ¢Ò»ÐеÄSQL [MSSQL2005]д·¨

--1. ´´½¨±í£¬Ìí¼Ó²âÊÔÊý¾Ý
CREATE TABLE tb(id int, [value] varchar(10))
INSERT tb SELECT 1, 'aa'
UNION ALL SELECT 1, 'bb'
UNION ALL SELECT 2, 'aaa'
UNION ALL SELECT 2, 'bbb'
UNION ALL SELECT 2, 'ccc'
--SELECT * from tb
/**//*
id value
----------- ----------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
(5 row(s) affected)
*/
--2 ÔÚSQL2000Ö»ÄÜÓÃ×Ô¶¨Ò庯ÊýʵÏÖ
----2.1 ´´½¨ºÏ²¢º¯Êýfn_strSum£¬¸ù¾ÝidºÏ²¢valueÖµ
GO
CREATE FUNCTION dbo.fn_strSum(@id int)
RETURNS varchar(8000)
AS
BEGIN
DECLARE @values varchar(8000)
SET @values = ''
SELECT @values = @values + ',' + value from tb WHERE id=@id
RETURN STUFF(@values, 1, 1, '')
END
GO
-- µ÷Óú¯Êý
SELECT id, VALUE = dbo.fn_strSum(id) from tb GROUP BY id
DROP FUNCTION dbo.fn_strSum
----2.2 ´´½¨ºÏ²¢º¯Êýfn_strSum2£¬¸ù¾ÝidºÏ²¢valueÖµ
GO
CREATE FUNCTION dbo.fn_strSum2(@id int)
RETURNS varchar(8000)
AS
BEGIN
DECLARE @values varchar(8000)
SELECT @values = isnull(@values + ',', '') + value from tb WHERE id=@id
RETURN @values
END
GO
-- µ÷Óú¯Êý
SELECT id, VALUE = dbo.fn_strSum2(id) from tb GROUP BY id
DROP FUNCTION dbo.fn_strSum2
--3 ÔÚSQL2005/SQL2008ÖеÄнⷨ
----3.1 ʹÓÃOUTER APPLY
SELECT *
from (SELECT DISTINCT id from tb) A OUTER APPLY(
SELECT [values]= STUFF(REPLACE(REPLACE(
(
SELECT value from tb N
WHERE id = A.id
FOR XML AUTO
), '<N value="', ','), '"/>', ''), 1, 1, '')
)N
----3.2 ʹÓÃXML
SELECT id, [values]=STUFF((SELECT ','+[value] from tb t WHERE id=tb.id FOR XML PATH('')), 1, 1, '')
from tb
GROUP BY id
--4 ɾ³ý²âÊÔ±ítb
drop table tb
/**//*
id values
----------- --------------------
1 aa,bb
2 aaa,bbb,ccc
(2 row(s) affected)
*/


Ïà¹ØÎĵµ£º

SQLÓï¾äÖеÄHaving×Ó¾äÓëwhere×Ó¾äÖ®Çø±ð


SQLÓï¾äÖеÄHaving×Ó¾äÓëwhere×Ó¾äÖ®Çø±ð
---WHERE¾ä×Ó×÷ÓÃÓÚ»ù±¾±í»òÊÔͼ£¬´ÓÖÐÑ¡ÔñÂú×ãÌõ¼þµÄÔª×é¡£HAVING×÷ÓÃÓÚ×飬´ÓÖÐÑ¡ÔñÂú×ãÌõ¼þµÄ×é---
ÔÚ˵Çø±ð֮ǰ£¬µÃÏȽéÉÜGROUP BYÕâ¸ö×Ӿ䣬¶øÔÚ˵GROUP×Ó¾äÇ°£¬ÓÖµÃÏÈ˵˵“¾ÛºÏº¯Êý”——SQLÓïÑÔÖÐÒ»ÖÖÌØÊâµÄº¯Êý¡£ÀýÈçSUM, COUNT, MAX, AVGµÈ¡£Õâ ......

sql server2005²éѯÓÅ»¯½¨Òé


²éѯÓÅ»¯µÄÄ¿µÄÊÇÌá¸ßÊý¾Ý¼ìË÷Ëٶȣ¬Ìá¸ßÊý¾Ý¼ìË÷Òâζ׿õÉÙ´ÅÅÌ
IO
¶ÁÈ¡»òÕßÂß¼­ÄÚ´æ¶ÁÈ¡´ÎÊý£¬ÕâÐèÒª´ÓÁ½¸ö·½ÃæÈëÊÖ£ºÊý¾ÝÒª¾¡¿ÉÄܵĻº´æµ½ÄÚ´æ¡¢¾¡¿ÉÄܵÄʹÓÃË÷Òý¡£ÄÚ´æµÄÎÊÌâ¿ÉÒԲμû
 
:
http://msdn.microsoft.com/zh-cn/library/ms188284.aspx
£¬±¾ÎÄÖ÷ÒªÊÇÌåÏÖÈçºÎʹÓÃË÷ÒýÀ´Ìá¸ßËٶȡ£¾ßÌå·½·¨£º
1) ......

[SQL]SQLÐÔÄܵ÷ÓÅ

³õ¼¶Æª —— ¼òµ¥²éѯÓï¾äµÄµ÷ÓÅ ÀîÃ÷»Û , Èí¼þ¹¤³Ìʦ, IBM­
ÀîÃ÷»Û£¬ÔÚ IBM ÖйúÈí¼þ¿ª·¢ÖÐÐÄ Data Studio ÍŶӹ¤×÷´ÓÊ InfoSphere Warehouse Administration Console µÄ¹¦ÄܲâÊÔ¹¤×÷¡£ÔøÔÚ developerWorks ·¢±í¡¶½« DB2 DWE 9.1.X ǨÒƵ½ DB2 Warehouse 9.5¡·¡¢¡¶InfoSphere Warehouse SQL ²Ö´¢ÃüÁîÐнӿ ......

sql server Ë÷ÒýÈëÃÅ

    ×î½ü×öÁËÒ»ÍøÕ¾£¬µ«ÊÇÔÚÍâÃæ·ÃÎÊÌ«Âý¡£±¾ÏëÕÒÏÂÔ­Òò¡£¿´¿´ÊdzÌÐòÔ­Òò»¹ÊÇÊý¾Ý¿âÔ­Òò¡£ÔÚÍøÉϹä¹ä¡£¿´ÁËÒ»ÏÂÊý¾Ý¿âË÷Òý¡£ÏÖÔÚ×ܽáһϡ£·½±ãÏ´β鿴¡£±¾ÎıȽϻù´¡ÊÇÈëÃż¶±ðµÄ¡£
     Ê×ÏÈ£¬Ê²Ã´ÊÇË÷Òý£¿´ÓBookOnlineÉÏsearchÁËһϣº    
  &nbs ......

sql:´æ´¢¹ý³Ì£¬ÊÂÎñ£¬out²ÎÊý

CREATE proc [dbo].[proc_DeleteTemplet] (@templeId varchar(15),@errorMessage varchar(50) output)
as
begin
  declare @error int
  set @error =0
  begin tran
  delete from tc_templet_Head where fBillNo=@templeId
  set @error=@error+@@error
  delete from tc_templet_ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ