"Nikolas Stevenson-Molnar"
<steve...@evergreen.edu> wrote in message
news:f45a26bc-1ee8-4a72-a90a-77f40eef6...@evergreen.edu
> If I have the following table:
>
> CREATE TABLE stem(sid integer primary key, x double, y double, dbh
> double);
>
> ... is there any way I can create an index for the following query?
>
> SELECT * FROM stem WHERE x + dbh > 20

No, not really. If you need this query often, you may want to add a 
column to store (x+dbh), and index that.

Igor Tandetnik 



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