Migrating Uber from MySQL to PostgreSQL
uber_migration_pypgday_2013
uber_migration_pypgday_2013
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GROUP BY<br />
Code Changes<br />
In <strong>MySQL</strong> you can do this:<br />
SELECT foo, bar FROM table GROUP BY foo;<br />
According <strong>to</strong> the Postgres/SQL specification, this query<br />
is invalid since bar is not an aggregated column.<br />
Evan Klitzke (<strong>Uber</strong>, Inc.) <strong>Migrating</strong> <strong>Uber</strong> <strong>from</strong> <strong>MySQL</strong> <strong>to</strong> <strong>PostgreSQL</strong> March 13, 2013 46 / 59
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