Re: Subquery for column names of tablefunc crosstab queries
| От | markw |
|---|---|
| Тема | Re: Subquery for column names of tablefunc crosstab queries |
| Дата | |
| Msg-id | 1297083288892-3374199.post@n5.nabble.com обсуждение исходный текст |
| Ответ на | Re: Subquery for column names of tablefunc crosstab queries (Joe Conway <mail@joeconway.com>) |
| Список | pgsql-general |
Thanks Joe
I'm very much learning as I go.
I've followed your example from top to bottom - your sample code works -
however its not clear to me how to execute the generate_crosstab_sql
function to produce the results in one single step.
I've tried this:
CREATE OR REPLACE VIEW mycrosstabresults AS select * FROM (SELECT
generate_crosstab_sql('mytable',
'rowid',
'text',
'rowdt::date',
'temperature',
'int',
'1 = 1')) as crosstabresults;
but this simply populates the view with the string below, not the actual
crosstab results.
SELECT * FROM crosstab ('SELECT rowid,rowdt::date,temperature FROM
mytable WHERE 1 = 1 ORDER BY
1,2','VALUES($v$2003-03-01$v$),($v$2003-03-02$v$),($v$2003-03-03$v$)')
AS (rowid
text,"2003-03-01" int,"2003-03-02" int,"2003-03-03" int)
Is it possible to incorporate and execute this string, all within my CREATE
OR REPLACE VIEW statement?
I would appreciate any help you can give.
Many thanks
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