SQL查询带来错误的结果

Question

我在调试此查询时遇到问题，这会给我带来错误的结果...... 2条记录而不是1条记录。

以下是查询：

SELECT DISTINCT t1.*, t2.filterid as filterid2 
FROM ( SELECT DISTINCT a.*, f.`filterid` 
FROM adds a 
JOIN adds_filters f 
ON a.`addid` = f.`addid` 
WHERE a.`catid` = 1 
AND f.`filterid` = 67 ) t1 

JOIN ( SELECT DISTINCT a.`addid`,f.`filterid` 
FROM adds a 
JOIN adds_filters f 
ON a.`addid` = f.`addid` 
WHERE a.`catid` = 1 
AND f.`filterid` = 68 ) t2 

JOIN ( SELECT DISTINCT a.`addid`,f.`filterid` 
FROM adds a 
JOIN adds_filters f 
ON a.`addid` = f.`addid` 
WHERE a.`catid` = 1 
AND f.`filterid` = 158 ) t3 
ON t1.addid = t2.addid

由于表格相当长，这里是fiddle

任何帮助都将深受赞赏

问候，约翰

Answer 1

我认为你在最后一行中想要的是

    ON t1.addid = t2.addid and t2.addid =t3.addid;