Question

我的任务是写一个查询来提取以下内容：

2013年12月18日创建的广告商输入的订单。

到目前为止我有这个，但我错过了FROM篇。

Select 
     WO_STATIONS.station_call_letters as "Station"
     ,WO_ORDERS.ORDER_NUMBER as "Order"
     ,WO_ADVERTISERS.advertiser_name as "Advertiser"
     ,WO ADVERTISERS.TCODE as "Adv Num"
     ,WO_ORDERS.FLIGHT_START_DATE as "Order Start"
     ,WO_ORDERS.FLIGHT_END_DATE as "Order End"
     ,WO_ADVERTISERS.CREATE_DATE AS "ADV CREATED"

FROM 

WHERE
      WO_ADVERTISERS.CREATE_DATE > '12/18/2013'

Answer 1

看起来可能有点像这样：

Select 
     WO_STATIONS.station_call_letters as "Station"
     ,WO_ORDERS.ORDER_NUMBER as "Order"
     ,WO_ADVERTISERS.advertiser_name as "Advertiser"
     ,WO ADVERTISERS.TCODE as "Adv Num"
     ,WO_ORDERS.FLIGHT_START_DATE as "Order Start"
     ,WO_ORDERS.FLIGHT_END_DATE as "Order End"
     ,WO_ADVERTISERS.CREATE_DATE AS "ADV CREATED"

FROM 
     WO_ORDERS inner join WO_STATIONS on WO_ORDERS.StationId = WO_STATIONS.StationId
     inner join WO_ADVERTISERS on WO_ADERTISERS.AdvertiserId = WO_ORDERS.AdververtiserId
WHERE
      WO_ADVERTISERS.CREATE_DATE > '12/18/2013'

您的数据库工具是否具有用于构建查询或视图的图形用户界面？如果是这样，您可以将三个表添加到查询工具中。如果数据库具有外键，则工具将自动为您创建FROM子句。如果没有，您可以将一个表的主键拖放到另一个表的外键中。

尝试使用这些资源获取有关连接的更多信息： Access SQL

我还推荐一本关于SQL的好书，例如：SQL Step by Step

不确定如何从查询的一部分写

1 个答案: