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

On Wed, Jun 27, 2001 at 02:25:23PM +0400, Igor wrote:
> Thank you for replay, it is working, but
> i would like to get result table with 5 rows.
> In your example we willl get 8 rows

I think it's time to reexamine what you're trying to acheive. What you are
asking is not possible with SQL, at least not easily. Do it in your client
code.

> RH> From: "Igor" <dbmanager@osb368.nnov.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)
>
> RH> Something along the lines of:
>
> RH> SELECT col1,col2,'' as dummy3, '' as dummy4
> RH> FROM table1
> RH> UNION
> RH> SELECT '' as dummy1, '' as dummy2, col3, col4
> RH> FROM table2

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Martijn van Oosterhout <kleptog@svana.org>
http://svana.org/kleptog/
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