factorial function

Applies to: check marked yes Databricks SQL check marked yes Databricks Runtime

Returns the factorial of expr.

Syntax 

factorial(expr)

Arguments

  • expr: An INTEGER expression between 0 and 20 inclusive.

Returns

A BIGINT.

If expr is out of bounds, the function returns NULL.

Examples 

> SELECT c1, factorial(c1) FROM range(-1, 22) AS t(c1);
 -1 NULL
  0 1
  1 1
  2 2
  3 6
  4 24
  5 120
  6 720
  7 5040
  8 40320
  9 362880
 10 3628800
 11 39916800
 12 479001600
 13 6227020800
 14 87178291200
 15 1307674368000
 16 20922789888000
 17 355687428096000
 18 6402373705728000
 19 121645100408832000
 20 2432902008176640000
 21 NULL