Vertica对于所计算的时间SQL声明大全

词：强、大、所有，强烈推荐

SQL语句	查询结果
select (timestamp '2005-01-17 10:00' - timestamp '2005-01-01');	16 10:10
select (timestamp '2005-01-17 10:00' - timestamp '2005-01-01') / 7;	2 08:17:08.571429
select (timestamp '2005-01-17 10:00' - timestamp '2005-01-01') day;	16
select cast((timestamp '2005-01-17 10:00' - timestamp '2005-01-01') day as integer) / 7;	2
select floor((timestamp '2005-01-17 10:00' - timestamp '2005-01-01') / interval '7');	2
select timestamptz '2009-05-29 15:21:00.456789';	2009-05-2915:21:00.456789-04
select timestamptz '2009-05-28';	2009-05-2800:00:00-04
select timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28';	1 15:21:00.456789
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28');	1 15:21:00.456789
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28')(3);	1 15:21:00.457
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28')second;	141660.456789
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') year;	0
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2007-01-01') month;	28
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2007-01-01') year;	2
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2007-01-01') year to month;	2-4
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') second(3);	141660.457
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') minute(3);	2361
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') minute;	2361
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') minute to second(3);	2361:00.457
select (timestamptz '2009-05-29 15:21:00.456789'-timestamptz '2009-05-28') minute to second;	2361:00.456789

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