在PHP查询中加入3个表

好吧，出于某种原因，我无法正确地使用PHP和MySQL连接3个表。我的查询处理2，但与3它不会。在PHP查询中加入3个表

select users.username, 
    users.ID, 
    users.currentTime, 
    users.gender, 
    user_ranks.likes as likes, 
    user_ranks.disslikes as diss, 
    profiles.img_url as URL 
from users 
inner join profiles, 
    user_ranks on users.ID = profiles.userID LIMIT 1

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2017-02-22 Miki Liki

您只有一个'on'。第三张表如何加入？ – chris85

你需要加入两个表与ON条款：

select users.username, 
    users.ID, 
    users.currentTime, 
    users.gender, 
    user_ranks.likes as likes, 
    user_ranks.disslikes as diss, 
    profiles.img_url as URL 
from users 
inner join profiles on users.ID = profiles.userID 
inner join user_ranks on user_ranks.ID = profiles.userID 
LIMIT 1

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2017-02-22 16:43:53 wogsland

嗯，这是有道理的，我不知道我不得不加入2次，全力阻滞哈哈。感谢队友，非常感谢。只要stackoverflow允许我将它标记为正确的答案！ –

很高兴能帮到你！ – wogsland

SELECT users.username, 
    users.ID, 
    users.currentTime, 
    users.gender, 
    user_ranks.likes as likes, 
    user_ranks.disslikes as diss, 
    profiles.img_url as URL 
FROM users 
INNER JOIN profiles 
    on users.ID = profiles.userID 
INNER JOIN user_ranks 
    on user_ranks.ID = profiles.userID 
LIMIT 1

来源

2017-02-22 16:47:04

太多'LIMIT's ... – wogsland

SELECT 
    users.username, 
    users.ID, 
    users.currentTime, 
    users.gender, 
    user_ranks.likes as likes, 
    user_ranks.disslikes as diss, 
    profiles.img_url as URL 
FROM users 
INNER JOIN profiles ON users.ID = profiles.userID 
INNER JOIN tbl_3 ON users.col = tbl_3.fk 
LIMIT 1

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2017-02-22 16:50:40 Makubex

你需要做的每个表的加入。例如：

select users.username, 
users.ID, 
users.currentTime, 
users.gender, 
user_ranks.likes as likes, 
user_ranks.disslikes as diss, 
profiles.img_url as URL from users 
inner join profiles on users.ID = profiles.userID 
inner join user_ranks on users.ID= user_ranks.ID LIMIT 1

来源

2017-02-22 16:53:25

在PHP查询中加入3个表

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