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Explore Stack Internal If you have no other unique identifier, you can use ctid:
delete from mytable where not exists (select 1 from mytable t2 where t2.name = mytable.name and t2.address = mytable.address and t2.zip = mytable.zip and t2.ctid > mytable.ctid ); It is a good idea to have a unique, auto-incrementing id in every table. Doing a delete like this is one important reason why.
If you have no other unique identifier, you can use ctid:
delete from mytable where not exists (select 1 from mytable t2 where t2.name = mytable.name and t2.address = mytable.address and t2.zip = mytable.zip and t2.ctid > mytable.ctid ); It is a good idea to have a unique, auto-incrementing id in every table. Doing a delete like this is one important reason why.
If you have no other unique identifier, you can use ctid:
delete from mytable where exists (select 1 from mytable t2 where t2.name = mytable.name and t2.address = mytable.address and t2.zip = mytable.zip and t2.ctid > mytable.ctid ); It is a good idea to have a unique, auto-incrementing id in every table. Doing a delete like this is one important reason why.
If you have no other unique identifier, you can use ctid:
delete from mytable where not exists (select 1 from mytable t2 where t2.name = mytable.name and t2.address = mytable.address and t2.zip = mytable.zip and t2.ctid > mytable.ctid ); It is a good idea to have a unique, auto-incrementing id in every table. Doing a delete like this is one important reason why.