oracle 查詢重複資料並且刪除, 只保留一條資料的SQL語句
阿新 • • 發佈：2019-01-02
delete from t_account where feedate in (
select feedate
from t_account
group by feedate
having count(1)>1
) and id not in (
select min(id)
from t_account
group by feedate
having count(1)>1
)
------------------------------------------------
delete from (
select * from t_account
where id not in(select min(id) from t_account group by feedate)
) t;
--------------------------------------------------
delete from t_account
where id in (select id
from t_account
where feedate in (select feedate
from t_account
group by feedate
having count(*) > 1)
minus
select min(id)
from t_account
where feedate in (select feedate
from t_account
group by feedate
having count(*) > 1)
group by feedate)
---------------------------------------------------
delete from t_account where id in
(
select id from
(
select rank() over(order by feedate) r ,ac.* from t_account ac
minus
select row_number() over(order by feedate) r, ac.* from t_account ac
)
);
----------------------------------------------------
delete from t_account top
where
to_char(top.feedate)in(
select up1.up1date from
(select to_char(feedate) up1date,count(id) up1num from t_account group by(to_char(feedate)) ) up1
where up1.up1num>1
)
and
top.id not in(
select min(tac.id) up3id from (
select up1.up1date up2date from
(select to_char(feedate) up1date,count(id) up1num from t_account group by(to_char(feedate)) ) up1
where up1.up1num>1
)up2 left join t_account tac on up2.up2date=to_char(tac.feedate) group by to_char(tac.feedate)
)
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