尝试编写一个查询来计算具有不同 where 情况的多个事物 [英] Trying to write a query that counts multiple things with different where cases

问题描述

我需要帮助我正在尝试编写一个查询，该查询计算具有不同 where 情况的多个事物.到目前为止，我可以进行单独的查询，但我要做的是将它们合并为一个

I need help I am trying to write a query that counts multiple things with different where cases. Here is where I got so far I was able to do separate queries, but what I am trying to do is combine them in one

SELECT COUNT(*) AS "Marketing"
    FROM PROJECT
    WHERE Department = 'Marketing';

SELECT COUNT(*) AS "Number of Finance"
    FROM PROJECT
    WHERE Department = 'Finance';

SELECT COUNT(*) AS "Number of Accounting"
    FROM PROJECT
    WHERE Department = 'Accounting';

推荐答案

尝试 分组

SELECT Department, COUNT(*) AS Count
FROM PROJECT
WHERE Department IN  ('Marketing','Finance','Accounting')
GROUP BY Department

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