出于某种原因，以下查询中出现错误，它给出“FUNCTION j.CONCAT 不存在”当我删除 concat 并只输入 .price 没有问题，所以问题必须在 concat 中的某个地方...... sql 检索还从数据库中购买了物品。
SELECT k.productid_with AS productid_with,
g.product AS product_with_product,
j.CONCAT('€ ', price) AS productid_with_price,
Replace(o.image_path,
'/home/user/domains/domain.com/public_html',
'http://www.domain.com') AS productid_with_image,
Replace(l.image_path,
'/home/user/domains/domain.com/public_html',
'http://www.domain.com') AS productid_with_bigImage,
k.productid,
h.product,
i.CONCAT('€ ', price) AS price,
Replace(m.image_path,
'/home/user/domains/domain.com/public_html',
'http://www.domain.com') AS image,
Replace(n.image_path,
'/home/user/domains/domain.com/public_html',
'http://www.domain.com') AS bigImage
FROM xcart_also_bought k
JOIN xcart_products_categories c
ON c.productid = 8863
JOIN xcart_categories d
ON c.categoryid = d.categoryid
AND d.parentid = 0
JOIN xcart_products a
ON k.productid_with = a.productid
AND a.forsale = 'Y'
JOIN xcart_products_categories e
ON a.productid = e.productid
AND e.categoryid = d.categoryid
JOIN xcart_products_lng g
ON a.productid = g.productid
JOIN xcart_pricing j
ON a.productid = j.productid
JOIN xcart_thumbnails o
ON a.productid = o.productid
JOIN xcart_bigthumbnails l
ON a.productid = l.productid
JOIN xcart_products b
ON k.productid = b.productid
AND b.forsale = 'Y'
JOIN xcart_products_categories f
ON b.productid = f.productid
AND f.categoryid = d.categoryid
JOIN xcart_products_lng h
ON b.productid = h.productid
JOIN xcart_pricing i
ON b.productid = i.productid
JOIN xcart_thumbnails m
ON b.productid = m.productid
JOIN xcart_bigthumbnails n
ON b.productid = n.productid
WHERE ( k.productid = '8863'
OR k.productid_with = '8863' )
ORDER BY bought DESC