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List:       postgresql-sql
Subject:    Re: [SQL] How to compare two tables in PostgreSQL
From:       Kamal Kumar TRR <kamalkumar.trr () gmail ! com>
Date:       2014-09-15 10:43:51
Message-ID: 1410777831983-5819036.post () n5 ! nabble ! com
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NOTE: SIMILAR TABLES -- Ignore if it doesn't meet your requirement.

If you like to compare the structure of the similar tables, then prefer
below example which will help you in locating the missing/additional column.
Consider we have these two tables on different schema. 

Table: 1 : billing_name
columns: no, name, invid, amount

Table 2: billing_name
columns: no,name,invid

*select * from (select column_name from information_schema.columns where
table_schema = 'TEST' and table_name like 'billing_name')
WHERE column_name NOT IN 
(select column_name from information_schema.columns where table_schema =
'public' and table_name like 'billing_name');*

*Result Set: amount*

Then, you can use any function/SP to dynamically pick the datatype and alter
column on run time. 

Thank you for your time.

Kamal



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