Running total?
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Samuel Williams
Jul 30, 2012, 10:38:16 PM7/30/12
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Hi,
Given a set of transactions with each transaction having an integer amount
or something similar, is it possible to generate a running total for each
transaction using map-reduce in CouchDB?
Kind regards,
Samuel
Given a set of transactions with each transaction having an integer amount
or something similar, is it possible to generate a running total for each
transaction using map-reduce in CouchDB?
Kind regards,
Samuel
Alexander Shorin
Jul 31, 2012, 2:12:07 AM7/31/12
to us...@couchdb.apache.org
Hi,
Depends on your data, but just emit transaction id from set as key and
his amount as value with map and _sum these values with reduce
function. If you need totals for all set, then emit [set_id, item_id]
key and group results by specific level.
--
,,,^..^,,,
Depends on your data, but just emit transaction id from set as key and
his amount as value with map and _sum these values with reduce
function. If you need totals for all set, then emit [set_id, item_id]
key and group results by specific level.
--
,,,^..^,,,
Samuel Williams
Sep 28, 2012, 9:32:08 AM9/28/12
to us...@couchdb.apache.org
Hi Alex,
Will your suggested approach give me a running balance such as on a bank
statement with a list of transactions?
Kind regards,
Samuel
Will your suggested approach give me a running balance such as on a bank
statement with a list of transactions?
Kind regards,
Samuel
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