Re: Comparing tables in different db's

Phillip F Jansen wrote: >I would like to know if there is a way to compare the data of tables in >different databases.
Forexample I have table in db1 and exactly the >same table in db2. Is it possible to see if the contents of the two
>tablesare exactly the same? >For example if the table(db1.customer) has a column surname and the >field has a value of
"Testing"and in db2.customer the exact same row >has a value "Testong" is it possible to actually know that there is a
>difference? I don't actually have to know what the actual differences >are , I must just know that there is a
difference.

You can't do it inside PostgreSQL.  However, this shell script will do it:
 psql -d db1 -tc "SELECT surname FROM customer WHERE id = 'xxx'" >db1.out psql -d db2 -tc "SELECT surname FROM customer
WHEREid = 'xxx'" >db2.out if ! diff db1.out db2.out >/dev/null then    echo Databases differ fi rm db[12].out
 

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Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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