Re: How to join tables with different columns and different number of rows?

From: "Richard Huxton" <dev(at)archonet(dot)com>
To: "dbmanager" <dbmanager(at)osb368(dot)nnov(dot)ru>, <pgsql-general(at)postgresql(dot)org>
Subject: Re: How to join tables with different columns and different number of rows?
Date: 2001-06-27 09:43:35
Message-ID: 002d01c0feed$a3bab380$1001a8c0@archonet.com
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From: "Igor" <dbmanager(at)osb368(dot)nnov(dot)ru>

> Hello!
>
> What SQL query will help me to concatenate two different tables
> with different number of rows? For example , i have first table
> with column1 and column2 , having 3 rows , and second table
> with column3, column4 , having 5 rows. How to make
> third table with column1,column2,column3,column4 and 5 rows in it
> (and last two rows in column1 and column2 are empty)

Something along the lines of:

SELECT col1,col2,'' as dummy3, '' as dummy4
FROM table1
UNION
SELECT '' as dummy1, '' as dummy2, col3, col4
FROM table2

should do it for you (not tested)

- Richard Huxton

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