Question

我收到的错误是：

1064 - 您的SQL语法出错;检查手册对应于您的MySQL服务器版本，以便使用正确的语法靠近＆＃39;）作为final_price，（p.products_price * m.nz_manufacturers_value / c.value + p.p＆＃39;在第1行

我在phpMyAdmin中运行此查询：

select p.products_quantity, p.products_id, p.manufacturers_id,
        m.manufacturers_currency,p.products_price as products_price_old, p.products_shipping, p.products_tax_class_id, 
        IF(s.status, s.specials_new_products_price, NULL) as specials_new_products_price, 
        IF(s.status, s.specials_new_products_price, p.products_price) as old_final_price,
        (IF(s.status, s.specials_new_products_price, p.products_price) * m.nz_manufacturers_value / c.value + p.products_shipping * 1.4) * (select value from currencies where currencies_id = 5) as final_price,
        (p.products_price * m.nz_manufacturers_value / c.value + p.products_shipping * 1.4) * (select value from currencies where currencies_id = 5) as products_price 
        from products_description pd, products p 
        left join manufacturers m on p.manufacturers_id = m.manufacturers_id 
        left join currencies c on c.code = m.manufacturers_currency 
        left join specials s on p.products_id = s.products_id, products_to_categories p2c 
        where p.products_status = '1' and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '1' and p2c.categories_id = '2716'

它工作正常。来自PHP它失败了。

在网站上，我删除了

select value from currencies where currencies_id = 5

（两个实例）和PHP工作正常。

所以PHP并不喜欢这样的嵌套select语句。

是否有一个简单的解决方法，或者我是否需要为该值编写单独的查询，然后将其作为变量应用于查询？

由于

Answer 1

您需要额外的括号来包装查询（以及IF语句）并将AS应用于结果，请尝试以下操作：

select p.products_quantity, p.products_id, p.manufacturers_id,
        m.manufacturers_currency,p.products_price as products_price_old, p.products_shipping, p.products_tax_class_id, 
        IF(s.status, s.specials_new_products_price, NULL) as specials_new_products_price, 
        IF(s.status, s.specials_new_products_price, p.products_price) as old_final_price,
        ((IF(s.status, s.specials_new_products_price, p.products_price) * m.nz_manufacturers_value / c.value + p.products_shipping * 1.4) * (select value from currencies where currencies_id = 5)) as final_price,
        (p.products_price * m.nz_manufacturers_value / c.value + p.products_shipping * 1.4) * (select value from currencies where currencies_id = 5) as products_price 
        from products_description pd, products p 
        left join manufacturers m on p.manufacturers_id = m.manufacturers_id 
        left join currencies c on c.code = m.manufacturers_currency 
        left join specials s on p.products_id = s.products_id, products_to_categories p2c 
        where p.products_status = '1' and p.products_id = p2c.products_id and pd.products_id = p2c.products_id and pd.language_id = '1' and p2c.categories_id = '2716'

嵌套查询导致1064 MySQL

1 个答案: