在SQL中使用其他表更新/插入表

Question

我对SQL有点麻烦，我使用MySQL。

我有两张桌子：

表1：Scrapp

id        address   last_price    m2   date_last_price
======================================================
id_1234        NY       100000   100       2017-11-27
id_5678    Madrid        90000   120       2017-11-27

表2：历史价格

id        price        date
===============================
id_1234  100000   2017-11-27
id_5678   90000   2017-11-27
id_1234  120000   2017-11-28
id_5678   90000   2017-11-28
id_1234  115000   2017-11-29
id_5678   95000   2017-11-29

我想在表1中插入/更新Table2中最后一个日期的价格。

结果必须如下

结果

id        address   last_price    m2   date_last_price
======================================================
id_1234        NY       115000   100       2017-11-29
id_5678    Madrid        95000   120       2017-11-29

你能帮我解决这个问题吗？

查询以创建此示例

#Table 1

CREATE TABLE IF NOT EXISTS scrapp(
    id varchar(50),
    address varchar(50),
    last_price int,
    m2 int,
    date_last_price date
);

INSERT INTO scrapp (id,address,last_price,m2,date_last_price)
VALUES('id_1234','NY',100000,100,'2017-11-27'),
('id_5678','Madrid',90000,120,'2017-11-27');

#Table 2

CREATE TABLE IF NOT EXISTS historic_price(
     id varchar(50),
     price int,
    `date` date
);

INSERT INTO historic_price(id,price,date)
VALUES('id_1234',100000,'2017-11-27'),
('id_5678',90000,'2017-11-27'),
('id_1234',120000,'2017-11-28'),
('id_5678',90000,'2017-11-28'),
('id_1234',115000,'2017-11-29'),
('id_5678',95000,'2017-11-29');

Answer 1

你可以在suquery上使用update with join获取最后一个价格

update scrapp 
inner join (

    select hp.id, hp.price, hp.date 
    from historic_price hp
    inner join  (
      select id, max(date) max_date
      from historic_price
      group by historic_price.id
    ) t on t.id = hp.id and t.max_date = hp.date 
) t2  on scrapp.id = t2.id
set scrapp.last_price = t2.price,
    scrapp.date_last_price = t2.date