同一查詢中同一表中的 2 個不同值並按日期分組

Question

現在表中的輸出對於香蕉總數是正確的，但對於綠色香蕉，輸出是每天的總數。 我希望它將每天的香蕉總數和綠色香蕉的總數分組。

SELECT bananas, date,

(SELECT COUNT(bananas) 
FROM banana_table
WHERE bananas = 'green')
AS green_bananas,

COUNT(bananas) AS total_bananas

FROM banana_table

GROUP BY date

Answer 1

使用條件聚合：

SELECT bananas, date,
       SUM( bananas = 'green' ) as green_bananas,
       COUNT(bananas) AS total_bananas
FROM banana_table
GROUP BY date;