Select 有没有办法把它浓缩成两列？计数（列名称）

你是说像这样吗

选择类型、计数（标题） 来自电影

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按体裁分组

压缩成两列是什么意思？

SELECT COUNT(title) AS SH
FROM movies
where genre = 'SH';

SELECT COUNT(title) AS CH
FROM movies
where genre = 'CH';

SELECT COUNT(title) AS ADV
FROM movies
where genre = 'ADV';

SELECT COUNT(title) AS COM
FROM movies
where genre = 'COM';

SELECT COUNT(title) AS DR
FROM movies
where genre = 'DR';

SELECT COUNT(title) AS SF
FROM movies
where genre = 'SF'

SELECT count(*), genre
FROM movies
GROUP BY genre;