Hi Guys,
I have hit a new problem and would like some advice if there's a way
around it.
Error: near line 2: out of memory
Basically, I have a table with 291 columns, 1.5 million rows. 288
columns have numeric values, additionally there is an itenid and day.
I want to use SQL to basically do count(Vn), avg(Vn), sum(Vn) and then
group by itenid and daytype (daytype comes from a mapping of day-->
daytype from a different table).
Statistics:
* Table has 291 columns
* There are about 50,000 unique itemid and the day runs from 1 - 31.
* The dump with count, avg, sum would have 288 x 3 + a couple of other
columns
* day --> daytype mapping results in 3 different daytypes
So, we are doing averages, counts, sum on 288 columns and grouping the
data from 5 - 20 rows each to generate 1 statistics row (itemid,
daytype). These would eventually result into 50,000 x 3 results.
Currently, I am trying to do this a limit 1 and it's already giving me
the out of memory error.
This is based on using sqlite3.exe downloaded from the sqlite3 shell
version 3.7.4.
So, the questions are:
* Am I doing something wrong?
* What can I change?
* Is there a setting that I could change?
* Am I just asking SQLite for a calculation that naturally needs a lot
of memory and I just need to think of restructuring it in some way.
Best Regards,
Mohit.
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