Sql 条件] No Percent date 123 0.25 20061026 123 0.75 20040126 123 0.25 20061126 123 0.25 20061226 12

条件]

No  Percent date    
123 0.25    20061026    
123 0.75    20040126    
123 0.25    20061126    
123 0.25    20061226    

123 0.75    20040126                

select no,percent, min(date) 
from a 
group by pno,percent            

123 0.25    20061026    
123 0.75    20040126    

select TOP 1 no,percent, [date] 
from a 
ORDER by [date]

DECLARE @T TABLE (Cust INT, Prct DECIMAL(6,2), Dt INT)
INSERT INTO @T VALUES (123, 0.25, 20061026), (123, 0.75, 20040126)
    , (123, 0.25, 20061126), (123, 0.25, 20061226)
    , (124, 0.27, 20061026), (124, 0.65, 20071226)
    , (124, 0.57, 20050602);
WITH cteRanked as (SELECT *, ROW_NUMBER() OVER(PARTITION BY Cust ORDER BY Dt) as RC FROM @T)
SELECT Cust , Prct , Dt  FROM cteRanked WHERE RC = 1

Cust    Prct    Dt
123 0.75    20040126
124 0.57    20050602

select no,percent, date 
from a
where date = (select min(date) from a)

    CREATE TABLE Table1
(
 no int,percent2 decimal(5,2),date3 date
);

    INSERT INTO Table1
 (no, percent2, date3)
 VALUES
 (123, 0.25, '20061026'),
 (123, 0.75, '20040126'),
 (124, 0.45, '20060726'),
 (124, 0.55, '20031126'),
 (125, 0.65, '20040526'),
 (125, 0.35, '20060926'),
 (126, 0.25, '20061226');


 WITH cteRanked as (SELECT *, ROW_NUMBER() OVER(PARTITION BY no ORDER BY date3) as RC FROM Table1)
 SELECT no, percent2, date3 FROM cteRanked WHERE RC = 1

 NO     PERCENT2    DATE3
 123    0.75    2004-01-26
 124    0.55    2003-11-26
 125    0.65    2004-05-26
 126    0.25    2006-12-26

SELECT TOP 1 number, perc, date
FROM sof 
ORDER by date

SELECT
   number, perc, date 
FROM 
   sof, (
       SELECT MIN(date) min_date
       FROM sof
   ) md
WHERE sof.date = md.min_date

select a.*
from table1 a
inner join (select no,min(date) mindate from table1 group by no) b
    on a.no=b.no and a.date=b.mindate