Question

任何人都可以告诉我这个MySQL查询有什么问题

SELECT count(items.id) AS numrows 
FROM items, subcategories 
WHERE items.`base_school` = 'UNN' 
    AND items.subcategory = subcategories.id 
    AND subcategories.parent_category = 3 
JOIN `item_images` 
    ON items.id=`item_images`.`item_id`

它不断抛出这个错误：

＃1064 - 您的SQL语法出错;检查与MySQL服务器版本对应的手册，以获得正确的语法在'加入item_images ON items.id = item_images。item_id'附近 1

Answer 1

你在错误的位置有WHERE子句，试试这个：

SELECT count(items.id) AS numrows 
FROM items
INNER JOIN subcategories 
    ON items.subcategory = subcategories.id 
INNER JOIN item_images 
    ON items.id=item_images.item_id
WHERE items.base_school = 'UNN' 
    AND subcategories.parent_category = 3

这个MySQL查询出了什么问题（＃1064）？

1 个答案: