[Database] Small example Oracle delete duplicate data

[Database] Oracle deduplicates data

As follows, the data table structure

id	name	pass
1	aaa	111
2	bbb	222
3	ccc	333

Through SQL, the following effects are achieved:

id	name	pass
1	aaa	111
2	bbb	222
3	ccc	333
1	aaa	111
2	bbb	222
3	ccc	333

Implement SQL:

insert into test_001 (id,name,pass) select id,name,pass from test_001 ;
 commit;

deduplicate data

delete from test_001 where name in (select name from test_001 group by name having count(name)>1)
and rowid not in (select min(rowid) from test_001 group by name having count(name)>1) ;
commit;