MySQL上的第一个查询有什么问题？两列的预期答案都是“718042670591505846”SELECT5002622390+(5102*140737488355328)new_iid_hard_way,CAST(5002622390+(5102*POWER(2,47))ASUNSIGNED)new_iid_WRONG_way它返回:'718042670591505846','718042670591505792'与此同时，此查询有效:SELECT5002622390+(5102*140737488355328)new_iid_hard_way,5002622390+(5102*CA