从2个表选择数据与第三表

表payment的链接的属性值具有如图FK{exchange_order_id}的exchange_order id和payment_info具有如FK{payment_id}的payment的ID。所以，payment_info和exchange_order没有任何共享属性，但我需要从他们的数据，这就是为什么我试图通过付款表中查询它们是唯一的链接中间。从2个表选择数据与第三表

我想拉记录一段时间，因此我不知道payment.id属性。

我得到错误near 'FROM exchange_order eo, payment_info pi JOIN payment p ON p.exchange_order_id = ' at line 6

SELECT 
eo.amount_proposed as proposed, 
eo.amount_realized as realized, 
pi.local_fee as fee, 
pi.local_market_rate as market_rate, 
    FROM exchange_order eo, payment_info pi 
JOIN payment p ON p.exchange_order_id = eo.id 
JOIN payment_info ON p.id = pi.payment_id 
WHERE create_time >= UNIX_TIMESTAMP('2015-09-01') AND create_time < UNIX_TIMESTAMP('2015-10-01')

来源

2015-10-06 Milkncookiez

更新：第一个删除多余的,之后pi.local_market_rate as market_rate从select语句即错误的主要原因。

SELECT 
eo.amount_proposed as proposed, 
eo.amount_realized as realized, 
pi.local_fee as fee, 
pi.local_market_rate as market_rate 
    FROM exchange_order eo 
JOIN payment p ON p.exchange_order_id = eo.id 
JOIN payment_info pi ON p.id = pi.payment_id 
WHERE create_time >= UNIX_TIMESTAMP('2015-09-01') AND create_time < UNIX_TIMESTAMP('2015-10-01')

来源

2015-10-06 12:22:42

仍然是一样的错误：\ – Milkncookiez

是的，我只是简单地复制你的解决方案，以确保我不会再错误的东西。仍然不起作用。 – Milkncookiez

pi.local_market_rate作为market_rate后，有一个逗号只是从你的sql或在我更新的一个中删除和运行。 –

你在这一行有两个表名之间用逗号：

 FROM exchange_order eo, payment_info pi

你不需要与ON子句一个JOIN某种某种？

来源

2015-10-06 12:19:40

你不能写这样的，如果你写

exchange_order eo, payment_info pi 
JOIN payment p

为sql它不能知道你的意思是

(exchange_order eo, payment_info pi) 
JOIN payment p

或

exchange_order eo, (payment_info pi 
JOIN payment p)

我敢肯定你不能使用逗号和连接在SQL中相同的FROM。

来源

2015-10-06 12:21:08

从2个表选择数据与第三表

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