sql - 无法使用 SQL/Bigquery JOIN 获取两条记录

Question

我有一个返回订单详细信息的查询，我想从 briisk 表中获取它找到的交易的信息。我也希望它能够显示订单，即使 briisk table 什么也没有。
如果我添加最后一行(以及 flostream.briisk.master = "")，我的查询仅返回一个结果，而不是两个。

SELECT *
FROM (SELECT orderno,ifnull(dealid,sales_rule) as DealIDCombo from flostream.orders left join  mobileheads.surveys on mobileheads.surveys.order_number = flostream.orders.externalreference) as first
INNER JOIN flostream.orders on first.orderno = flostream.orders.orderno
LEFT JOIN flostream.briisk on first.dealidcombo = flostream.briisk.uniquereference
WHERE first.orderno in (359692,359683)
//AND flostream.briisk.master = ""

Answer 1

当您使用左外连接时，您需要在on子句中包含第二个表的过滤条件。所以试试这个:

SELECT *
FROM (SELECT orderno,ifnull(dealid,sales_rule) as DealIDCombo
      from flostream.orders left join
           mobileheads.surveys
           on mobileheads.surveys.order_number = flostream.orders.externalreference
     ) as first INNER JOIN
     flostream.orders
     on first.orderno = flostream.orders.orderno LEFT JOIN
        flostream.briisk
     on first.dealidcombo = flostream.briisk.uniquereference AND
        flostream.briisk.master = ""
WHERE first.orderno in (359692, 359683)

第一个表的条件应放在 WHERE 子句中。