Question

为什么此查询只返回一行的任何想法？

SELECT c.category_id, c.parent_id, cd.name, cd.description 
FROM mydb_category c 
LEFT JOIN mydb_category_description cd 
ON (c.category_id = cd.category_id) 
WHERE c.category_id IN ('46,59') 
AND c.status        = '1' 
AND cd.language_id  = '1'

language_id是正确的，status是正确的，但由于某种原因，我只返回category_id 46行。

Answer 1

删除IN('46,49')中的引号，以便您的查询如下所示：

SELECT 
    c.category_id, c.parent_id, cd.name, cd.description
FROM
    mydb_category c
        LEFT JOIN
    mydb_category_description cd ON (c.category_id = cd.category_id)
WHERE
    c.category_id IN (46,59)
        AND c.status = '1'
        AND cd.language_id = '1'

查看documentation以获取更多信息。祝你好运！

MySQL查询只返回一行

1 个答案: