hive：函数：datediff计算时间差

datediff计算时间差：

select datediff('2018-06-04','2018-06-05');

hive (default)> select datediff('2018-06-04','2018-06-05');
OK
_c0
-1
Time taken: 0.085 seconds, Fetched: 1 row(s)
hive (default)>