Gnanakumar, 03.02.2011 13:00:
Is there a batch/bulk UPDATE query syntax available in PostgreSQL, similar
to multirow VALUES syntax available for INSERT?
INSERT Multirow VALUES syntax example:
INSERT INTO films (code, title, did, date_prod, kind) VALUES
('B6717', 'Tampopo', 110, '1985-02-10', 'Comedy'),
('HG120', 'The Dinner Game', 140, DEFAULT, 'Comedy');
There is a situation in my application, where I am performing lots and lots
of updates on individual rows. I am trying to figure out how to make the
updates faster.
Any other ideas/ways to make updates faster are highly appreciated.
Regards,
Gnanam
Maybe this pattern would work for you:
UPDATE my_table
SET the_column = CASE
WHEN some_id_column = 1 then 100
WHEN some_id_column = 2 then 200
WHEN some_id_column = 3 then 300
WHEN some_id_column = 4 then 400
WHEN some_id_column = 5 then 500
END
WHERE some_id_column IN (1,2,3,4,5)
But that get's pretty nasty if you have more than just those 5 rows.
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