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name----time
a-------2006
a-------2007
a-------2008
a-------2009
b-------2007
b-------2008
c-------2007
c-------2008
c-------2009
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a----2008
b----2008
c----2008
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SQL code:
DECLARE @TB TABLE(name VARCHAR(10),time INT)
INSERT @TB
SELECT 'a',2006 UNION ALL
SELECT 'a',2007 UNION ALL
SELECT 'a',2008 UNION ALL
SELECT 'a',2009 UNION ALL
SELECT 'b',2007 UNION ALL
SELECT 'b',2008 UNION ALL
SELECT 'c',2007 UNION ALL
SELECT 'c',2008 UNION ALL
SELECT 'c',2009

SELECT top 1 TIME from
(SELECT * from @TB T1
WHERE EXISTS(SELECT 1 from @TB WHERE TIME=T1.TIME AND NAME<>T1.NAME))AS T
group by time
having count(*)=(select count(distinct name) from @tb ) order by time desc


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TIME
-----------
2008

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SQL code



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