刪除表中重復記錄大于兩條保存兩條

delete from t_Cht_clm_reg F where F.case_id in ( select T.case_id from ( select B.* from (select e.* , row_number() over (partition by e.notice_id order by e.case_id desc) rn from t_Cht_clm_reg e) B where B.notice_id in( select A.notice_id

delete from t_Cht_clm_reg F where F.case_id in (
select T.case_id from (
select B.* from (select e.* , row_number() over (partition by e.notice_id order by e.case_id desc) rn
from t_Cht_clm_reg e) B where B.notice_id in(
select A.notice_id from (select e.* , row_number() over (partition by e.notice_id order by e.case_id desc) rn
from t_Cht_clm_reg e) A group by A.notice_id having count(A.notice_id) > 2 )
) T where T.RN > 2 )

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