---- test the random function---- count the number of tuples originallySELECT count(*) FROM onek;-- select roughly 1/10 of the tuples-- Assume that the "onek" table has 1000 tuples--  and try to bracket the correct number so we--  have a regression test which can pass/fail-- - thomas 1998-08-17SELECT count(*) AS random INTO RANDOM_TBL  FROM onek WHERE oidrand(onek.oid, 10);-- select again, the count should be differentINSERT INTO RANDOM_TBL (random)  SELECT count(*)  FROM onek WHERE oidrand(onek.oid, 10);-- now test the results for randomness in the correct rangeSELECT random, count(random) FROM RANDOM_TBL  GROUP BY random HAVING count(random) > 1;SELECT random FROM RANDOM_TBL  WHERE random NOT BETWEEN 80 AND 120;