>>-RAND--(--+------------+---)---------------------------------><
'-expression-'
The schema is SYSFUN.
Returns a random floating point value between 0 and 1 using the argument as the optional seed value. The function is defined as not-deterministic.
An argument is not required, but if it is specified it can be either INTEGER or SMALLINT.
The result of the function is a &dpfpn;. The result can be null; if the argument is null, the result is the null value.