删除重复数据，保留一条ID最小的

SELECT * from TBCITY_Temp
where code 
 in (
  select
   code
    from TBCITY_Temp
   group by code
  having count(code) > 1
  )
and   AutoId not in (
      select min(AutoId)
        from TBCITY_Temp
       group by code    
      having count(code)>1)

-- 条件为code再重复数据里，and Id 不是最小的