mysql - 带计数的一对多关系查询

Question

我有以下查询:

this->getDoctrine()->getManager();
        $sql = "SELECT shop.*
                FROM instagram_shop shop
                LEFT JOIN instagram_shop_picture picture 
                ON picture.shop_id = shop.id
                WHERE COUNT(picture) = 0
                AND shop.isLocked = 0
                AND shop.expirydate IS NOT NULL 
                AND shop.expirydate > now()
                AND shop.deletedAt IS NULL
                "

想要获取所有包含 0 张图片的商店。但这会返回一个 sql 错误:

General error: 1111 Invalid use of group function

这是为什么？

Answer 1

SELECT shop.id
FROM instagram_shop shop
LEFT JOIN instagram_shop_picture picture ON picture.shop_id = shop.id
WHERE shop.isLocked = 0
AND shop.expirydate IS NOT NULL 
AND shop.expirydate > now()
AND shop.deletedAt IS NULL
GROUP BY shop.id
HAVING COUNT(picture.shop_id) = 0