I want populate a column (rnd_order) with a random and unique integer value. The 2nd Query below generate a random value but it store the same one in every row. What I’m doing wrong there?
UPDATE profiles2 SET rnd_order = 1; UPDATE `profiles2` SET rnd_order = (SELECT rid FROM (SELECT FLOOR(RAND() * 199999) AS rid FROM `profiles2` WHERE "rnd_order" NOT IN (SELECT rnd_order FROM `profiles2`) LIMIT 1) q);
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