TSQL模式（以均值，中位数，模式表示）

模式是最常见的值。您可以通过聚合和获得此信息

row_number()

select idsOfInterest, valueOfInterestfrom (select idsOfInterest, valueOfInterest, count(*) as cnt,  row_number() over (partition by idsOfInterest order by count(*) desc) as seqnum      from table t      group by idsOfInterest, valueOfInterest     ) twhere seqnum = 1;