[英]Hive query to get min and max of date column group by year and id
我有兩列id和date的表。我想獲取該年份特定ID的最大日期和最小日期。 以下是樣本數據和我想要的結果樣本數據
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
我期待的結果
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
我嘗試通過使用下面的多個查詢,但我不會根據年份進行排序
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)
嘗試這個
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,可以將其轉換為CAST(date_col AS DATE)
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