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Re^3: SQL Database Table to Perl Script

by roboticus (Chancellor)
on Oct 05, 2012 at 15:11 UTC ( #997494=note: print w/replies, xml ) Need Help??

in reply to Re^2: SQL Database Table to Perl Script
in thread SQL Database Table to Perl Script


You'll want something like:

-- compute the totals for each account: select AccNum, sum(DB_amt) ttl_DB_amt, sum(CR_amt) ttl_CR_amt from ( -- transform the table from (accnum, type, amount) into -- (accnum, cr_amt, db_amt) select accnum, case when type='Credit' then Amount else 0 end CR_amt, case when type='Debit' then Amount else 0 end DB_amt from YOUR_TABLE_NAME where CHOOSE_WHICH_ACCOUNT(S)_YOU_WANT ) group by AccNum

The inner select converts your table into a simpler view of account number, credit amount and debit amount. The outer select generates the totals for the simple view.

Update: For your other questions, simply make the appropriate view transformations and accumulate the totals as above.


When your only tool is a hammer, all problems look like your thumb.

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