sql加入进一步需要帮助

Question

我被困在查询，我想要显示来自不同的表和他们的桥表的数据。
表是：

bridge (bid,planid,fbridgeid) 
fbridge (fbridgeid,featureid,valueid) 
features (featureid,fname) 
value (valueid,value) 
plans (planid,name,price,discount) 

下面是到目前为止我的查询：

SELECT 
(NAME AS pname, price AS prize, 
discount AS ds, fname AS feature, VALUE AS vlue 
FROM plans ) 

我想所有的数据库列，但按照计划

like planid 1 ->> contains ->> feature id 1,2,3 and valueid 1,3,5 etc) 

Answer 1

加入你的表在他们正确的领域。

SELECT * 
FROM plans p 
INNER JOIN bridge b ON p.planid = b.planid 
INNER JOIN fbridge fb ON b.fbridgeid = fb.fbridgeid 
INNER JOIN features f ON fb.featureid = f.featureid 
INNER JOIN value v ON fb.valueid = v.valueid 

然后，您可以从它们中选择任何字段。

SELECT p.name AS pname, p.price AS prize, p.discount AS ds, f.fname AS feature, v.value AS vlue 
FROM plans p 
INNER JOIN bridge b ON p.planid = b.planid 
INNER JOIN fbridge fb ON b.fbridgeid = fb.fbridgeid 
INNER JOIN features f ON fb.featureid = f.featureid 
INNER JOIN value v ON fb.valueid = v.valueid 

Answer 2

的Join旨意是：

SELECT pl.name AS pname, pl.price AS prize , pl.discount AS ds , fe.fname AS feature, va.VALUE AS vlue 
FROM plans pl 
JOIN bridge br ON br.planid = pl.planid 
JOIN fbridge fb ON fb.fbridgeid = br.fbridgeid 
JOIN features fe ON fe.featureid = fb.featureid 
JOIN value va ON va.valueid = fb.valueid 
WHERE pl.plainid = 1 

Answer 3

select b.bid,b.planid,b.fbridgeid,fb.fbridgeid,f.featureid,f.fname,v.valueid,v.value,p.name,p.price,p.discount from bridge as b 
inner join fbridge as fb on fb.bridgeid=b.bridgeid 
inner join features as f on f.featureId=fb.featureid 
inner join value as v on v.valueid=fb.valueid 
inner join plans as p on p.planid=b.planid 
where p.planid=1 and f.featureId in (1,2,3) and v.valueid in (1,3,5)