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rand, random

Description​

Returns a random floating-point number between 0 (inclusive) and 1 (exclusive).

Syntax​

RAND(x);

Parameters​

x: optional. The data type is BIGINT. If x is specified, this function returns a repeatable random number. If x is not specified, this function returns a completely random number.

Return value​

Returns a value of the DOUBLE type.

Examples​

select rand();
+--------------------+
| rand()             |
+--------------------+
| 0.9393535880089522 |
+--------------------+
1 row in set (0.01 sec)
select rand(3);
+--------------------+
| rand(3)            |
+--------------------+
| 0.6659865964511347 |
+--------------------+
1 row in set (0.00 sec)

Keywords​

RAND, RANDOM