with MiPriceTopOne as (
select classid,max(dataTime) dataTime,max(id) as id from MiPrice group by classid
)
select * from MiPrice where id in (select id from MiPriceTopOne)
with MiPriceTopOne as (
select classid,max(dataTime) dataTime,max(id) as id from MiPrice group by classid
)
select * from MiPrice where id in (select id from MiPriceTopOne)