I have been given an interesting problem to solve in a postgres db. I was given
two tables
t1:
site treatment variable id (pk)
-------------------------------------------------------------
A X BLUE 1A
B Y RED 2B
A Y GREEN 3A
t2:
rowid (pk) timestamp BLUE RED GREEN
-----------------------------------------------------------------------------------------
1 1332493200 3.4 2.1
5.8
2 1332496800 3.2 2.0
5.8
3 1332500400 3.3 2.2
6.0
I need to combine the site and treatment information from t1 with the variable
records in t2. I think I will have to combine these one variable at a time.
Something like this (I'm not using the word join, because I don't think this is
a join in the regular sense. It's more like some kind of crazy pivot table
thing!):
t3:
rowid (pk) timestamp BLUE site
treatment
-------------------------------------------------------------------------------------
1 1332493200 3.4 A
X
2 1332496800 3.2 A
X
3 1332500400 3.3 A
X
and then:
t4
rowid (pk) timestamp RED site
treatment
-------------------------------------------------------------------------------------
1 1332493200 2.1 B
Y
2 1332496800 2.0 B
Y
3 1332500400 2.2 B
Y
Is this even possible?
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