once long 10000 5000 20000 expr 1 / rand() rand() / 0xFFFFFFFF 0xFFFFFFFF / rand() toFloat64(number) toFloat64(number % 10) toFloat64(rand()) toFloat64(rand64()) toFloat32(number) toFloat32(number % 10) toFloat32(rand()) toFloat32(rand64()) SELECT count() FROM system.numbers WHERE NOT ignore(toString({expr}))