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Given this table layout, I'm gonna take a wild guess and ask if you're
coming from MySQL and expecting the second serial order_code to be a
sub-autoincrement to id?
no, always used PostgreSQL, but i'm having a deeper approach now, until
now i've been using th ORDBMS in a very 'easy' manner :(
If so, it won't be. That's a mysqlism. If
you want something similar, you'll have to implement it yourself, and
note that such a thing tends to be a poor performer with lots of
parallel updates, and it can also be susceptible to race conditions if
no locking is used.
thank you, regards,
Gianluca Riccardi
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TIP 6: explain analyze is your friend
