[英]Hive query to get min and max of date column group by year and id
我有两列id和date的表。我想获取该年份特定ID的最大日期和最小日期。 以下是样本数据和我想要的结果样本数据
id date_col
123 2015-05-01 04:00:00
123 2017-04-01 04:00:00
123 2017-09-01 04:00:00
123 2014-09-01 04:00:00
123 2012-12-01 05:00:00
123 2016-08-01 04:00:00
123 2014-05-01 04:00:00
123 2016-10-01 04:00:00
我期待的结果
123 2014-05-01 2014-09-01
123 2015-05-01
123 2016-08-01 2016-10-01
123 2017-04-01 2017-09-01
我尝试通过使用下面的多个查询,但我不会根据年份进行排序
SELECT id,MAX(date_col) AS maxdate_col,MIN(date_col) AS mindate_col FROM table GROUP BY id
SELECT id,MAX(date_col) AS max_votes,MIN(date_col) AS mindate_col,YEAR(date_col) FROM test GROUP BY id,YEAR(date_col)
尝试这个
SELECT id
,MIN(date_col) AS mindate_col
,(CASE WHEN MAX(date_col) <> MIN(date_col) THEN MAX(date_col) END) AS maxdate_col
,YEAR(date_col) AS year_col
FROM test
GROUP BY id,YEAR(date_col)
ORDER BY id,year_col
如果只需要date
部分,可以将其转换为CAST(date_col AS DATE)
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