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mysql实现sql server 中rownumber

2016-05-16 18:13 441 查看
SELECT * FROM (

SELECT

@row_number := CASE

WHEN @Opportunity_Id = OpportunityId THEN @row_number + 1

ELSE 1

END AS num,

@Opportunity_Id := OpportunityId AS OpportunityId,

ActualRevenue,

DESCRIPTION,

ModifiedOn

FROM

OpportunityClose,( SELECT @Opportunity_Id := '',@row_number := 0) AS t

ORDER BY OpportunityId, ModifiedOn DESC

) re WHERE re.num=1
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