Hello!
I have a problem joining two tables. I tried various types of join and
none seems to work as I expect
Table 1:
id | stuff
-----------
1 | sth1
2 | sth2
3 | sth3
4 | sth4
5 | sth5
.. | ...
Table 2:
id | desc | etc
------------------
1 | desc1 | etc1
2 | desc2 | etc2
2 | desc3 | etc3
2 | desc4 | etc4
3 | desc5 | etc5
| desc6 | etc6
5 | desc7 | etc7
.. | ... | ...
I need something like:
id | stuff | desc | etc
-------------------------
1 | sth1 | desc1 | etc1
2 | sth2 | desc2 | etc2
2 | sth2 | desc3 | etc3
2 | sth2 | desc4 | etc4
3 | sth3 | desc5 | etc5
5 | sth5 | desc7 | etc7
So: join by id, discard rows that don't match any row from the other
table, add separate row for each row from table 2 that matches the same
row from table 1.
So far the best I could get (using inner join) was something like:
id | stuff | desc | etc
-------------------------
1 | sth1 | desc1 | etc1
2 | sth2 | desc2 | etc2
2 | sth2 | desc2 | etc2
2 | sth2 | desc2 | etc2
3 | sth3 | desc5 | etc5
5 | sth5 | desc7 | etc7
(i.e. multiplied one row from table 2 instead of separate rows matching
the same row from table 1)
right/left/full (outer) also seem to do the same thing (multiply one
row) and I don't know any other join methods.
Is there a way to accomplish what I am trying to do? Or maybe I am
missing something?
Thanks in advance!
PB
--
Geographical Information Systems Laboratory
Institute of Earth Sciences, UMCS
http://gis.umcs.lublin.pl/en/
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