SQL取重复数据保留ID最小的一条记录
select whir$3136_f3914,whir$3136_f3916,whir$3136_lx,whir$3136_f3915
from whir$3136 a
where (a.whir$3136_f3916,
a.whir$3136_f3914,
a.whir$3136_f3915,
a.whir$3136_lx) in (select whir$3136_f3916,
whir$3136_f3914,
whir$3136_f3915,
whir$3136_lx
from whir$3136
group by whir$3136_f3916,
whir$3136_f3914,
whir$3136_f3915,
whir$3136_lx
having count(*) > 1)
and rowid not in (select min(rowid)
from whir$3136
group by whir$3136_f3916,
whir$3136_f3914,
whir$3136_f3915,
whir$3136_lx
having count(*) > 1)
and whir$3136_date = '2011-12-27'
