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if (object_id ('t' ) is not null ) drop table t
go
create table t (id int identity (1 , 1 ), name varchar (40 ))
go
insert into t (name ) select newid ()
go 10
select * from t
/*
1 18C1C418-9029-4599-8D5E-616354A113C8
2 A0FE1177-09D8-4C56-9FB5-C2FAFF0155CF
3 9033E8BB-B9A4-4A08-83D8-40064AB68C5F
4 A179A300-E30B-42BF-974E-50928EB7DCF1
5 C1D36D3B-C4D7-431B-8C81-95C9EF9061A0
6 8A99066A-7993-4C06-9763-482C0BF5E687
7 2F0664A8-F91D-4BDE-BA0B-48624137B7CA
8 74C3FED3-6182-4ED9-9BFE-9C3DEC662F35
9 4E7A8CC8-D7CE-4A0D-8562-688FB3F91458
10 EC82BD91-20B3-46C1-B7CC-C4A8A9099376
*/
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Code
<%@ page language="java" contentType="text/html; ......
//ÕâÊÇÌí¼Ó
private void button1_Click(object sender, EventArgs e)
{
string s = "Persist Security Info=False;Integrated Security=SSPI;database=IIntegration;server=(local)";
&n ......
MySQL:
SELECT column from table
ORDER BY RAND()
LIMIT 1
PostgreSQL:
SELECT column from table
ORDER BY RANDOM()
LIMIT 1
Microsoft SQL Server:
SELECT TOP 1 column from table
ORDER BY NEWID()
IBM DB2
SELECT column, RAND() as IDX
from table
ORDER BY IDX FETCH FIRST 1 ROWS ONLY
Thanks Ti ......
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sqlserver2005Óйؼü×Öntile(x)ºÍover(partition by.. order by..)×Ó¾äÅäºÏ.
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select id , name , colid , rn from (
select * , rn = ntile (10 )
over (partition by id order by colorder )
from syscolumns )t where rn = 1 ......