重命名内部联接并将其用于后续的内部联接

Question

所以我有三个 table。

1) business:
-> id           (varchar)  id of business
-> name         (varchar)  name of business

2) review:
-> business_id  (varchar)  id of reviewed business
-> user_id      (varchar)  id of user who reviewed

3) user:
-> id           (varchar)  id of user
-> name         (varchar)  name of user
-> review_count (int)      number of reviews written by the user

我想编写一个查询，以提取已被撰写超过 10 条评论的用户评论过的那些企业的 business.id 和 business.name。

我考虑过在 user 和 review 上进行内部联接，条件是 user.id = review.user_id，其中 user.id in (select id from user where review_count > 10)。这将在仅选择属于已撰写超过 10 条评论的用户的那些 user.id 后，对上述 table 执行内部联接。接下来我希望对这个新的 table 和 business table 执行内部连接，条件是 business.id = new_table.business_id，其中 new_table 是 [=35] =] 通过对评论和用户执行之前的内部连接获得。

我知道我的重命名语法可能有问题。

我收到语法错误：Error: near "where": syntax error。我正在使用 sqlite3.

这是我目前所掌握的。

select business.id, business.name
from business inner join  
(                  
review inner join user
on review.user_id = user.id
where user.id in (
select id
from user
where review_count > 10) 
) as R
on R.business_id = business.id;

Answer 1

下面的查询应该与您要执行的查询相同。

select business.id, business.name
from business                 
inner join review on review.business_id = business.id
inner join user on user.id = review.user_id 
where user.review_count > 10

重命名内部联接并将其用于后续的内部联接

Renaming an inner join and using it for a subsequent inner join

sql

sqlite

inner-join

table-rename