我有一個select語句多加入如下:MySQL的語句返回同一行兩次
SELECT *
FROM supplements
LEFT JOIN tutorials
ON supplements.id = tutorials.supplement_id
LEFT JOIN brands
ON supplements.brand_id = brands.id
WHERE supplements.id = '75'
當我運行它,它與ID 75返回連續兩次!
這是怎麼發生的?
? – m4t1t0 2013-03-08 08:15:56