0
votes
2answers
79 views

Advice on scripting a “whitewashed” and downsized development db from main db

Currently we (an active opensource project) have a large PostgreSQL production database which contains all the site records. Since we can't just allow every developer or contributor access to the ...
8
votes
2answers
3k views

For absolute performance, is SUM faster or COUNT?

This relates to counting the number of records that match a certain condition, e.g. invoice amount > $100. I tend to prefer COUNT(CASE WHEN invoice_amount > 100 THEN 1 END) However, this is ...
2
votes
1answer
1k views

Postgres uuid: Use as primary key, or in addition to SERIAL -for disconnected app-

For a new SASS app with postgres 9, that will support disconnected clients. The client not will use the regular IDs, only the UUID. The clients will be on iOS, html5/python and perhaps later on other ...
2
votes
1answer
658 views

Auto Increment Index Field For Create and Update

I'm trying to create an unique auto increment index field that is re-generated on both inserts and updates. I need it so that a client can send a server an integer and get back all outdated (created ...
10
votes
4answers
3k views

Tools to migrate from SQLite to PostgreSQL

I need to continuously migrate from SQLite to PostgreSQL. By continuously, I mean that I will reimport the SQLite database into PostgreSQL every day. It would be nice if I could make changes to the ...