SQL重复记录查询查询多个字段、多表查询、删除重复记录的方法

select * from people 
where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 

select * from testtable 
where numeber in (select number from people group by number having count(number) > 1 ) 

delete from people  

where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1) 

and rowid not in (select min(rowid) from people group by peopleId having count(peopleId )>1) 

select * from vitae a 
where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) 

delete from vitae a 

where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) 

and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1) 

select * from vitae a 
where (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) 
and rowid not in (select min(rowid) from vitae group by peopleId,seq having count(*)>1) 

Select Name,Count(*) From A Group By Name Having Count(*) > 1 

Select Name,sex,Count(*) From A Group By Name,sex Having Count(*) > 1 

declare @max integer,@id integer 
 
declare cur_rows cursor local for select 主字段,count(*) from 表名 group by 主字段 having count(*) >； 1 
 
open cur_rows 
 
fetch cur_rows into @id,@max 
 
while @@fetch_status=0 
 
begin 
 
select @max = @max -1 
 
set rowcount @max 
 
delete from 表名 where 主字段 = @id 
 
fetch cur_rows into @id,@max 
 
end 
 
close cur_rows 
 
set rowcount 0 

select distinct * from tableName 

select distinct * into #Tmp from tableName 
 
drop table tableName 
 
select * into tableName from #Tmp 
 
drop table #Tmp 

select identity(int,1,1) as autoID, * into #Tmp from tableName 
 
select min(autoID) as autoID into #Tmp2 from #Tmp group by Name,autoID 
 
select * from #Tmp where autoID in(select autoID from #tmp2) 

select * from tablename where id in ( 
 
select id from tablename  
 
group by id  
 
having count(id) > 1 
 
)