如何使用连接使用mySQL计数？

Question

我有以下数据库架构，我想获取所有类别的名称，但没有与该类别相关的引号。我写的查询只给了我一行，请你告诉我资源有效的查询。

Answer 1

SELECT SC.Name, Count(*) AS Quotes
FROM status_categories AS SC
INNER JOIN status_quotes AS SQ ON SC._id = SQ._category_id
GROUP BY SC.Name

Answer 2

SELECT status_categories.NAME, COUNT(status_quotes.category_id)
FROM status_categories JOIN status_quotes ON status_categories._id = status_quotes.category_id
GROUP BY status_categories._id;

Answer 3

尝试以下方法：

SELECT     `c`.`name`, COUNT(*) AS `Number of quotes`
FROM       `status_categories` AS `c`
INNER JOIN `status_quotes` AS `q`
    ON     `q`.`category_id` = `c`.`_id`
GROUP BY   `c`.`_id`;

修改 的

随意遗漏`字符。但这是安全的做法，即使它看起来有点讨厌。