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Concept visual
Start at both ends
Formula
Return a random decimal number (no seed value - so it returns a completely random number >= 0 and < 1):SELECT RAND();The RAND() function returns a random number between 0 (inclusive) and 1 (exclusive).
seed )
Optional. If seed is specified, it returns a repeatable sequence of random numbers. If no seed is specified, it returns a completely random number
From MySQL 4.0
Return a random decimal number (with seed value of 6):
SELECT RAND(6);Formula
Return a random decimal number >= 5 and < 10:SELECT RAND()*(10-5)+5;Return a random number >= 5 and <=10:
SELECT FLOOR(RAND()*(10-5+1)+5);❮ MySQL Functions