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delete from tbl_talbe
where (col1,col2,col3) in
(select col1,col2,col3
from tbl_table
group by col1,col2,col3
having count(*)>1)
and rowid not in
(
select max(rowid)
from tbl_table
group by col1,col2,col3
having count(*) >1
)
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Create [or replace] trigger [ģʽ.]´¥·¢Æ÷Ãû
Before| after |instead of insert|delete|(update of ÁÐÃû)
{insert|delete|(update of ÁÐÃû) }
On ±íÃû|ÊÓͼ|ģʽÃû|Êý¾Ý¿âÃû
[for each row]
When Ìõ¼þ
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