Question

我正在尝试运行此查询但不运行

SELECT ng.parent_id, ng.tab, ng.post_id, ng.ORDER, ng.cluster_key, pd.id, pd.slug, pd.link_text, pd.parent
FROM `ecom_navigation` AS ng, `ecom_page_data` AS pd
WHERE ng.cluster_key = 'primary'
AND ng.tab = '0'
AND ng.parent_id = '1'pd.id = ng.post_id
ORDER BY ng.order

并收到错误

您的SQL语法有错误;检查手册对应于您的MySQL服务器版本，以便使用正确的语法在第1行'pd.id = ng.post_id ORDER BY ng.order'附近

我已经尝试过`ng.order`和`ng` .order`但仍然无法让它运行。

非常感谢任何帮助

Answer 1

我认为你错过了and：

AND ng.parent_id = '1'pd.id = ng.post_id

应该是：

AND ng.parent_id = '1'
AND pd.id = ng.post_id

或者更好的是，将连接条件放在连接中（除非它们确实是字符串，否则不要引用您的数字）：

SELECT ng.parent_id, ng.tab, ng.post_id, ng.ORDER, ng.cluster_key, pd.id, pd.slug, pd.link_text, pd.parent
FROM `ecom_navigation` AS ng join `ecom_page_data` AS pd on ng.post_id = pd.id
WHERE ng.cluster_key = 'primary'
AND ng.tab = 0        -- Leave the quotes on if tab is a string
AND ng.parent_id = 1  -- Leave the quotes on if parent_id is a string
ORDER BY ng.order

Answer 2

尝试

ng。order

如果我可以在这个编辑器中显示反引号，那么它们就会存在，但它似乎会删除它们

反引号用于转义列名等中的保留字和空格

Answer 3

将您的查询更改为（'放错了地方）

SELECT ng.parent_id, ng.tab, ng.post_id, ng.ORDER, ng.cluster_key, pd.id, pd.slug, pd.link_text, pd.parent
FROM `ecom_navigation` AS ng, `ecom_page_data` AS pd
WHERE ng.cluster_key = 'primary'
AND ng.tab = '0'
AND ng.parent_id =  '1' AND pd.id = ng.post_id
ORDER BY ng.order

OR

SELECT ng.parent_id, ng.tab, ng.post_id, ng.ORDER, ng.cluster_key, pd.id, pd.slug, pd.link_text, pd.parent
FROM `ecom_navigation` AS ng, `ecom_page_data` AS pd
WHERE ng.cluster_key = 'primary'
AND ng.tab = '0'
AND ng.parent_id =  1 AND pd.id = ng.post_id
ORDER BY ng.order

mysql - 使用保留名称作为列名

3 个答案: