id name
1 a
2 b
3 c
1 a
2 b
3 c
The following SQL statements are all the above table mytable:
1. Query all data recorded with id=1,3 select * from mytable
where id in(1,3)
2. Delete the data with duplicate id, and only all data with id=1,2,3 remain in the table. Select * into # from mytable
truncate table mytable
insert table select distinct * from #
select * from table
drop table #
1 a
2 b
3 c
1 a
2 b
3 c
The following SQL statements are all the above table mytable:
1. Query all data recorded with id=1,3 select * from mytable
where id in(1,3)
2. Delete the data with duplicate id, and only all data with id=1,2,3 remain in the table. Select * into # from mytable
truncate table mytable
insert table select distinct * from #
select * from table
drop table #