Forum OpenACS Development: Re: Crossing table rows to rows and columns

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Posted by Gustaf Neumann on
Iuri, many PostgreSQL installations, many extensions are already included, can can do simply in psql:

CREATE EXTENSION IF NOT EXISTS tablefunc;

If this works, your are done, you can use the crosstab family

oacs-5-10=# \df crosstab
crosstab crosstab2 crosstab3 crosstab4

otherwise progress as Dave suggested

see also:
https://stackoverflow.com/questions/3002499/postgresql-crosstab-query
https://www.vertabelo.com/blog/creating-pivot-tables-in-postgresql-using-the-crosstab-function/