timezone - 在 Vertica 中将一个时区的日期时间值转换为另一个时区

Question

Vertica 中是否有任何内容可以获得与 Oracle 中的以下 Sql 查询给出的输出相同的输出？

SELECT FROM_TZ(CAST(TO_DATE('1999-12-01 11:00:00', 
      'YYYY-MM-DD HH:MI:SS') AS TIMESTAMP), 'America/New_York') 
   AT TIME ZONE 'America/Los_Angeles' "West Coast Time" 
   FROM DUAL;

West Coast Time
------------------------------------------------
01-DEC-99 08.00.00.000000 AM AMERICA/LOS_ANGELES

Answer 1

我能够转换。下面给出的示例查询:

SELECT TIMESTAMP WITH TIME ZONE '2012-07-02 10:00:00-04' AT TIME ZONE 'GMT';
      timezone
---------------------
2012-07-02 14:00:00
(1 row)


SELECT TIMESTAMP WITH TIME ZONE '2012-07-02 14:00:00-00' AT TIME ZONE 'EDT';
      timezone
---------------------
2012-07-02 10:00:00
(1 row)