Question

我有两张桌子：

表Filters

id   INT(11) PRIMARY KEY
text VARCHAR(50)

表items

id    INT(11) PRIMARY KEY
title VARCHAR(255)

我想尽量减少所有过滤条件以及它们在标题中的出现次数

我目前正在使用此声明，但我得到零作为计数

SELECT  filters.text, 
        (SELECT COUNT(items.id) 
         FROM items 
         WHERE (items.title LIKE 'filters.text' OR 
                items.title LIKE '%filters.text' OR 
                items.title LIKE '%filters.text%' OR 
                items.title LIKE 'filters.text%')
        ) AS count
        FROM filters, items
GROUP BY filters.ID
ORDER BY filters.ID DESC

Answer 1

尝试一下，

SELECT  a.text, COUNT(b.id) totalCount
FROM    filters a
        LEFT JOIN items b
            ON b.title LIKE CONCAT('%',a.text,'%')
GROUP BY a.text
ORDER BY totalCount DESC

SQLFiddle Demo Link

选择过滤条件及其计数

1 个答案: