BIGINT UNSIGNED VALUE IS out of range My SQL

Question

I\'m getting the following error

#1690 - BIGINT UNSIGNED value is out of range in \'(legends.spawns.quantity -

Answer 1

I don’t quite understand why everyone is saying unsigned. I have a special value in sql and also reported this error. I did it by converting this value to decimal.

cast(1000000000000000000 AS DECIMAL ( 35, 2 ))