Hive时间函数笔记

unix_timestamp()函数：

返回值: bigint
说明: 获得当前时区的UNIX时间戳

举例：

hive> select unix_timestamp() from dual;
1455616811

hive> select unix_timestamp('20180303','yyyyMMdd') from dual;
1520006400

hive> select unix_timestamp('20180303','yyyyMM') from dual;
2308752000

hive> select unix_timestamp('20180304','yyyyMM') from dual;
2311430400

hive> select unix_timestamp('201803','yyyyMM') from dual;
1519833600

hive> select unix_timestamp('20180301','yyyyMM') from dual;
2303654400