yyyy字符串转换为日期

yyyy字符串转换为日期

本文介绍了如何在BigQuery中将dd / mm / yyyy字符串转换为日期?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有3列
1. dd / mm / yyyy(存储为字符串)
2. app_id和#downloads的应用程序

I have 3 columns1. dd/mm/yyyy (stored as a string)2. app_id and #downloads of apps

我必须在一周内找到下载的应用的唯一ID。

I have to find unique ids of apps downloaded within a week.

谢谢

推荐答案

yyyy字符串转换为BigQuery时间戳,使用类似以下内容:

You can convert your dd/MM/yyyy strings into BigQuery timestamps using something like the following:

SELECT TIMESTAMP(year + '-' + month + '-' + day) as output_timestamp
FROM (
  SELECT
    REGEXP_EXTRACT(input_date, '.*/([0-9]{4})$') as year,
    REGEXP_EXTRACT(input_date, '^([0-9]{2}).*') as day,
    REGEXP_EXTRACT(input_date, '.*/([0-9]{2})/.*') AS month
  FROM
    (SELECT '30/10/2015' as input_date),
    (SELECT '25/01/2015' as input_date)
)

将它们转换为时间戳后,您可能会发现有用,具体取决于你想要做什么。

Once you have converted them to timestamps, you may find the date and time functions useful, depending on what you're trying to do.

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07-29 11:41