In relational algebra, I have relation R and relation S, and want to find the cardinality of R, of S, and of R-intersect-S. I know the SQL for R and S. What's the best way to compute the cardinality of each relation (query) and of their intersection? -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
