在 Netezza 中为日期添加天数 [英] Adding days to a date in Netezza

问题描述

我有一个查询从字段 [DATE] BETWEEN '10/1/2017' AND '10/31/2017' 中提取日期

I have a query pulling dates from field [DATE] BETWEEN '10/1/2017' AND '10/31/2017'

我想在条件之间的结束日期中添加天数 (10/31/2017).似乎不可能.我可以使用 ADD_MONTHS 完美地添加月份，但似乎没有函数 ADD_DAYS.

I want to add days to the the end date in the between criteria (10/31/2017). It seems impossible. I can add months perfectly using ADD_MONTHS, but there doesn't seem to be a function ADD_DAYS.

非常感谢您的帮助！

推荐答案

add_months 处理因月份长度可变而产生的特殊情况.

add_months deals with the special cases that arise from having variable length months.

对于其他时间间隔，事情要简单得多:

For other intervals of time, things are much simpler:

要将 5 天添加到当天，请使用:

To add 5 days to the current day, use this:

SYSTEM.ADMIN(ADMIN)=> select current_date, current_date + interval '5 days';
    DATE    |      ?COLUMN?       
------------+---------------------
 2017-12-19 | 2017-12-24 00:00:00
(1 row)

T2DB.ADMIN(ADMIN)=> select * from interval_test where col1 between (current_timestamp - interval '2 days') and (current_timestamp + interval '3 days');
    COL1    
------------
 2017-12-19
(1 row)

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