兩個查詢優化

Question

我有兩個疑問：

SELECT `type`, COUNT(`id`) AS 'type' FROM `items` WHERE `post` = `id` GROUP BY `type`; 
SELECT `type`, COUNT(`post`!=`id`) AS 'posts' FROM `items` GROUP BY `type`; 

有沒有什麼辦法讓它在一個查詢？

Answer 1

如何像這樣

SELECT `type`, 
     COUNT(`post`=`id`), 
     COUNT(`post`!=`id`) AS 'posts' 
FROM `items` 
GROUP BY `type`;