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榪欏氨浜х敓浜嗗垎甯冨紡鏌ヨ鐨勯渶姹? 闃呰鍏ㄦ枃
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鍘熻憲錛氶偣寤?
鏀圭紪錛氱埍鏂拌緗?姣撳崕(鍗佸叓騫撮闆?瀹堝緱鍐板北闆幉鑺卞紑) 2007-12-16 騫夸笢娣卞湷
鏈夎〃tb, 濡備笅:
id value
----------- -----------
1 aa,bb
2 aaa,bbb,ccc
嬈叉寜id,鍒嗘媶value鍒? 鍒嗘媶鍚庣粨鏋滃涓?
id value
----------- --------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
1. 鏃х殑瑙ｅ喅鏂規硶(sql server 2000)
SELECT TOP 8000 id = IDENTITY(int, 1, 1) INTO # FROM syscolumns a, syscolumns b
SELECT A.id, SUBSTRING(A.[values], B.id, CHARINDEX(',', A.[values] + ',', B.id) - B.id)
FROM tb A, # B
WHERE SUBSTRING(',' + A.[values], B.id, 1) = ','
DROP TABLE #
2. 鏂扮殑瑙ｅ喅鏂規硶(sql server 2005)
create table tb(id int,value varchar(30))
insert into tb values(1,'aa,bb')
insert into tb values(2,'aaa,bbb,ccc')
go
SELECT A.id, B.value
FROM(
SELECT id, [value] = CONVERT(xml,' <root> <v>' + REPLACE([value], ',', ' </v> <v>') + ' </v> </root>') FROM tb
)A
OUTER APPLY(
SELECT value = N.v.value('.', 'varchar(100)') FROM A.[value].nodes('/root/v') N(v)
)B
DROP TABLE tb
/*
id value
----------- ------------------------------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
(5 琛屽彈褰卞搷)
*/
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鏂規硶涓錛?br />
SELECT * INTO XLImport3 FROM OPENDATASOURCE('Microsoft.Jet.OLEDB.4.0','Data Source=E:\Temp.xls;Extended Properties=Excel 5.0')...[Temp$]
鏂規硶浜岋細
SELECT * INTO XLImport4 FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0','Excel 5.0;Database=E:\Temp.xls', [Temp$])
鏂規硶涓夛細
SELECT * INTO XLImport5 FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0','Excel 5.0;Database=E:\Temp.xls', 'SELECT * FROM [Temp$]')
--鍍忛欏嬭〃瑁￠潰綣肩簩娣誨姞璦橀寗
INSERT INTO XLImport5
SELECT * FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0','Excel 5.0;Database=E:\Temp.xls', 'SELECT * FROM [Temp$]')
SELECT * FROM XLImport5
DROP TABLE XLImport3
DROP TABLE XLImport4
DROP TABLE XLImport5
[Temp$]鎸囩殑鏅傚欎綘鐨凟xcel琛ㄦ牸瑁￠潰鐨凷heet鍚嶇ū錛岃寰楃編鍏冪鍚堟槸寰岄潰鍔犱笂鍘葷殑錛屾槸蹇呴爤瑕佸姞鐨勶紝濡傛灉浣犵殑Excel鏄?.0鐨勶紝鍙渶瑕丒xcel 5.0鍗沖彲銆?br />
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-- 緇欎綘涓涓祴璇曟柟娉曪紝浠巒orthwind涓殑orders琛ㄥ彇鏁版嵁銆?br />
select * into n1 from orders
select * into n2 from orders
select * from n1
select * from n2
--娣誨姞涓婚敭錛岀劧鍚庝慨鏀筺1涓嫢騫插瓧孌電殑鑻ュ共鏉?br />
alter table n1 add constraint pk_n1_id primary key (OrderID)
alter table n2 add constraint pk_n2_id primary key (OrderID)
select OrderID from (select * from n1 union select * from n2) a group by OrderID having count(*) > 1
/* 搴旇鍙互錛岃屼笖灝嗕笉鍚岀殑璁板綍鐨処D鏄劇ず鍑烘潵銆備笅闈㈢殑閫傜敤浜庡弻鏂硅褰曚竴鏍風殑鎯呭喌錛?/
select * from n1 where orderid in (select OrderID from (select * from n1 union select * from n2) a group by OrderID having count(*) > 1)
-- 鑷充簬鍙屾柟浜掍笉瀛樺湪鐨勮褰曟槸姣旇緝濂藉鐞嗙殑
--鍒犻櫎n1,n2涓嫢騫叉潯璁板綍
delete from n1 where orderID in ('10728','10730')
delete from n2 where orderID in ('11000','11001')
--*************************************************************
-- 鍙屾柟閮芥湁璇ヨ褰曞嵈涓嶅畬鍏ㄧ浉鍚?br />
select * from n1 where orderid in(select OrderID from (select * from n1 union select * from n2) a group by OrderID having count(*) > 1)
union
--n2涓瓨鍦ㄤ絾鍦╪1涓笉瀛樼殑鍦?0728,10730
select * from n1 where OrderID not in (select OrderID from n2)
union
--n1涓瓨鍦ㄤ絾鍦╪2涓笉瀛樼殑鍦?1000,11001
select * from n2 where OrderID not in (select OrderID from n1)
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Name Subject Result
寮犱笁 璇枃 80
寮犱笁 鏁板 90
寮犱笁 鐗╃悊 85
鏉庡洓 璇枃 85
鏉庡洓 鏁板 92
鏉庡洓 鐗╃悊 82
緄愭灉錛?br /> 濮撳悕 璇枃 鏁板 鐗╃悊
寮犱笁 80 90 85
鏉庡洓 85 92 82
DROP TABLE Test
create table Test(Name varchar(10),Subject Varchar(10),Result int)
insert Test
select '寮典笁','瑾炴枃',80 union all
select '寮典笁','鏁稿',90 union all
select '寮典笁','鐗╃悊',85 union all
select '鏉庡洓','瑾炴枃',85 union all
select '鏉庡洓','鏁稿',92 union all
select '鏉庡洓','鐗╃悊',82
go
SELECT * FROM Test
--鐢ㄦ柤澶氳鐨勮綁鎻?br />
declare @sql varchar(4000)
set @sql = 'select Name'
select @sql = @sql + ',sum(case Subject when '''+Subject+''' then Result end) ['+Subject+']'
from (select distinct Subject from test) as a
select @sql = @sql+' from test group by name'
exec(@sql)
--濡傛灉琛屾暩灝戦欏嬬湅璧蜂締鏇村姞鏄庣灜
select Name as 濮撳悕,
sum(case Subject when '鏁稿' then Result end) [鏁稿],
sum(case Subject when '鐗╃悊' then Result end) [鐗╃悊],
sum(case Subject when '瑾炴枃' then Result end) [瑾炴枃]
from Test group by name
鎴戜互鍓嶉潰瑭︾殑鏅傚欒冭│閬庨欑ó欏炰技鐨勯錛屼篃鏄垜鍊戝湪綬ㄧ▼闁嬬櫦閬庣▼涓稉甯擱亣鍒扮殑涓紼父瑕嬮錛屾垜鐨勫垎鏋愬笇鏈涘皪澶у鏈夊公鍔┿?/p>
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b. 鏈懆鐨勬槦鏈熶竴
SELECT DATEADD(wk, DATEDIFF(wk,0,getdate()), 0)
c. 涓騫寸殑絎竴澶?br /> SELECT DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)
d. 瀛ｅ害鐨勭涓澶?br /> SELECT DATEADD(qq, DATEDIFF(qq,0,getdate()), 0)
e. 涓婁釜鏈堢殑鏈鍚庝竴澶?br /> SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(mm,0,getdate()), 0))
f. 鍘誨勾鐨勬渶鍚庝竴澶?br /> SELECT dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate()), 0))
g. 鏈湀鐨勬渶鍚庝竴澶?br /> SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))
h. 鏈湀鐨勭涓涓槦鏈熶竴
select DATEADD(wk, DATEDIFF(wk,0, dateadd(dd,6-datepart(day,getdate()),getdate()) ), 0)
i. 鏈勾鐨勬渶鍚庝竴澶?br /> SELECT dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate())+1, 0))
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