Hi, when, in psql, on a postgres 12.3, I write: select ceiling(random()*2582); it does provide the expected answer, ie. a number between 1 and 2582, inclusive. allways. when I decide to use this to get a random row within a table prenoms having 2 columns a id serial, and a prenom varchar, with explicitly 2582 lines, no gaps, I write: select id, prenom from prenoms where id=ceiling(random()*2582);
expecting to get, allways, one line. But its not the case. around 15% of time I get 0 lines which is already quite strange to me. but 10% of time, I get a random number of lines, until now up to 4. even weirder (to me !) so, can someone please clarify ? thanks, regards, Marc MILLAS Senior Architect +33607850334 www.mokadb.com
