On Wed, 5 Oct 2011, David Johnston wrote:
2) "Window" - max(quant) OVER (PARTITION BY ...)
Hmm-m-m. I have a problem here emulating the example on the document page.
Regardless of which column is first after SELECT postgres tells me that
column does not exist.
select site_id, sample_date, param, max(quant) over (partition by param)
chemistry;
ERROR: column "site_id" does not exist
LINE 1: select site_id, sample_date, param, max(quant) over (partiti...
^
select str_name, site_id, sample_date, param, max(quant) over (partition by
str_name) chemistry;
ERROR: column "str_name" does not exist
LINE 1: select str_name, site_id, sample_date, param, max(quant) ove...
^
What am I doing incorrectly here?
Also, with the window function can I limit the output to a single str_name
and param?
Rich
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