https://cloud.google.com/bigquery/docs/reference/standard-sql/mathematical_functions Generates an error if X is a value outside of the range [-1, 1]. ... Division by -1 may overflow. X, Y, DIV(X, Y). 20, 4, 5. 12, -7, -1. 20, 3, 6. 0, 20, 0. 20, 0 ...