[英]SELECT data from 4 tables in MySQL
我对MySQL语句有疑问:
SELECT
oxarticles.OXTITLE AS TITLE,
oxmanufacturers.OXTITLE_1 AS OXMANTITLE,
oxarticles.OXDISTEAN AS OXDISTEAN,
oxarticles.OXMPN AS MPN,
oxarticles.OXPRICE AS OXPRICE,
oxarticles.OXSTOCK AS OXSTOCK,
oxarticles.OXARTNUM AS OXARTNUM,
oxseo.OXSEOURL AS OXSEOURL,
oxartextends.OXLONGDESC_1 AS OXLONGDESC
FROM `oxarticles`
INNER JOIN `oxartextends` ON oxarticles.OXID = oxartextends.OXID
INNER JOIN `oxmanufacturers` ON oxarticles.OXID = oxmanufacturers.OXID
INNER JOIN `oxseo` ON oxarticles.OXID = oxseo.OXOBJECTID;
我的问题是表oxarticles
和oxmanufacturers
具有两个相同的列名OXID
和OXTITLE_1
但是上面的代码不起作用。 请帮忙。
您正在尝试将商品ID与制造商ID相匹配。 错了 您需要使用制造商ID(而不是商品ID)将商品表加入制造商表。
在您的情况下, oxarticles.OXMANUFACTURERID
表中的制造商ID是oxarticles.OXMANUFACTURERID
,制造商表中的是oxmanufacturers.OXID
。
SELECT
oxarticles.OXTITLE AS TITLE,
oxmanufacturers.OXTITLE_1 AS OXMANTITLE,
oxarticles.OXDISTEAN AS OXDISTEAN,
oxarticles.OXMPN AS MPN,
oxarticles.OXPRICE AS OXPRICE,
oxarticles.OXSTOCK AS OXSTOCK,
oxarticles.OXARTNUM AS OXARTNUM,
oxseo.OXSEOURL AS OXSEOURL,
oxartextends.OXLONGDESC_1 AS OXLONGDESC
FROM `oxarticles`
INNER JOIN `oxartextends`
ON oxarticles.OXID = oxartextends.OXID
INNER JOIN `oxmanufacturers`
ON oxarticles.OXMANUFACTURERID = oxmanufacturers.OXID
-- ^^^
-- Here's the manufacturer id
-- in the article table
INNER JOIN `oxseo`
ON oxarticles.OXID = oxseo.OXOBJECTID;
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