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And in 9.0 you will have listagg()

Scott Bailey
– Scott Bailey

2010-04-01 16:55:29 +00:00
Commented Apr 1, 2010 at 16:55
8

To get CSV the query should be: SELECT id_field, array_to_string(array_agg(value_field1), ','), array_to_string(array_agg(value_field2),', ') FROM data_table GROUP BY id_field

Nux
– Nux

2012-02-16 16:08:34 +00:00
Commented Feb 16, 2012 at 16:08
2

You can't use array_to_string in all cases here. If your value_field contains an embedded comma, the resulting CSV is incorrect. Using array_agg() and casting to TEXT properly quotes strings with embedded commas. The only caveat is that it also includes the starting and ending curly braces, hence my statement "and edit as needed". I will edit to clarify that point.

Matthew Wood
– Matthew Wood

2012-02-21 20:00:56 +00:00
Commented Feb 21, 2012 at 20:00
FYI: here's a link to docs on array_agg in 8.4

Michael Rusch
– Michael Rusch

2014-04-22 21:35:33 +00:00
Commented Apr 22, 2014 at 21:35

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