mysql—同一表并集后两个值求和

odopli94 于 2021-06-21 发布在 Mysql

关注(0)|答案(2)|浏览(400)

我的问题是：

SELECT location_description as Crimes,COUNT(*)
FROM test_sample
where test_sample.day_of_week LIKE"%sunday"
GROUP BY test_sample.location_description
UNION ALL
SELECT location_description as Crimes,COUNT(*)
FROM test_sample
where test_sample.day_of_week LIKE"%saturday"
GROUP BY test_sample.location_description

我的输出是：

如何将这两个重复值合并为一个。

sql mysql union sum

来源：https://stackoverflow.com/questions/52271515/sum-two-values-after-union-of-same-table

2条答案

按热度按时间

cgyqldqp1#

如果只需要通过“location\u description”字段获取记录数，则只能使用不带并集的分组

SELECT location_description AS Crimes,
       COUNT(*)
FROM test_sample
WHERE day_of_week LIKE "%sunday"
  OR day_of_week LIKE "%saturday"
GROUP BY location_description

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kmbjn2e32#

不用了 UNION 现在，只要调整一下 WHERE 包括两天；

SELECT location_description as Crimes,COUNT(*)
FROM test_sample
where test_sample.day_of_week LIKE"%sunday"
   or test_sample.day_of_week LIKE"%saturday"
GROUP BY test_sample.location_description

赞(0）回复(0）举报 2021-06-21

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mysql—同一表并集后两个值求和

2条答案

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