Comments on: Comparing data from 2 database tables

By: Farid Z

Farid Z — Sat, 08 May 2010 21:24:23 +0000

Easiest way is to use a free database table differencing tool such as CompareData Using already packaged/developed tool you can also compare the data where the two tables live on different servers, even DBMSs, since in that case you will not be able to do a join.

By: Michael

Michael — Wed, 09 Sep 2009 11:00:46 +0000

for some reason this article has just appeared in the planetpostgres twitter feed… in Postgresql there is also the option of http://pgdba.net/pg51g … yes, shameless self-promotion this is, but anyone interested in your article may also be interested in pg51g. cheers

By: Maresa

Maresa — Tue, 26 May 2009 17:08:31 +0000

Thank you Ted. I didn't know there's EXCEPT clause on PostgreSQL SELECT statement.

By: Ted

Ted — Tue, 26 May 2009 13:59:44 +0000

(SELECT * FROM table1 EXCEPT SELECT * FROM table2)
UNION
(SELECT * FROM table2 EXCEPT SELECT * FROM table1)

By: Fernando Vezzosi

Fernando Vezzosi — Tue, 26 May 2009 10:53:49 +0000

Maatkit has mk-table-sync that can be used for diffing tables:

http://www.maatkit.org/doc/mk-table-sync.html