1、查詢表中多餘的重複記錄，重複記錄是根據單個欄位（peopleId）來判斷

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

2.刪除表中多餘的重複記錄，重複記錄是根據單個欄位（peopleId）來判斷，只留有rowid最小的記錄

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)

3、查詢表中多餘的重複記錄（多個欄位）

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

4、刪除表中多餘的重複記錄（多個欄位），只留有rowid最小的記錄

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

5、查詢表中多餘的重複記錄（多個欄位），不包含rowid最小的記錄

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