SQL

Question

我需要帮助向我的查询中添加额外的联接。

所有 tables 目前都是从 SO_Header 左外部连接的，但是我还需要一些来自 table 的数据，称为 RANGE，它只链接到 MODEL table.

如何编辑我的脚本以引入范围 table？

我在 Excel 中使用从 Microsoft 查询中获取数据。

从我的脚本中摘录：

FROM dbo.SO_HEADER SO_HEADER LEFT OUTER JOIN 
     dbo.WEEK_NUMBERS WEEK_NUMBERS 
     ON SO_HEADER.SOH_Build_Week = WEEK_NUMBERS.WEEK_Week_No AND
        SO_HEADER.SOH_Build_Year = WEEK_NUMBERS.WEEK_Year LEFT OUTER JOIN
     dbo.MODEL MODEL 
     ON SO_HEADER.SOH_Model = MODEL.MODEL_Code LEFT OUTER JOIN
     dbo.RETAILERS RETAILERS 
     ON SO_HEADER.SOH_Retailer = RETAILERS.RET_Code LEFT OUTER JOIN
     dbo.FACTORY_OPTIONS FACTORY_OPTIONS 
     ON SO_HEADER.SOH_Upholstery = FACTORY_OPTIONS.FAC_Code LEFT OUTER JOIN
     dbo.FINANCE_HOUSES FINANCE_HOUSES 
     ON SO_HEADER.SOH_Finance = FINANCE_HOUSES.FIN_Code

Answer 1

假设您的范围 table 中有一个名为 RANGE_MODEL_Code 的外键，那么您可以像这样加入模型和范围

您还可以根据您的业务需求更改加入方式table（i-e让加入、内部加入或外部加入）

FROM dbo.SO_HEADER SO_HEADER LEFT OUTER JOIN 
     dbo.WEEK_NUMBERS WEEK_NUMBERS 
     ON SO_HEADER.SOH_Build_Week = WEEK_NUMBERS.WEEK_Week_No AND
        SO_HEADER.SOH_Build_Year = WEEK_NUMBERS.WEEK_Year LEFT OUTER JOIN
     dbo.MODEL MODEL 
     ON SO_HEADER.SOH_Model = MODEL.MODEL_Code LEFT OUTER JOIN
     dbo.RANGE RANGE
     ON MODEL.MODEL_Code = RANGE.RANGE_MODEL_Code LEFT OUTER JOIN
     dbo.RETAILERS RETAILERS 
     ON SO_HEADER.SOH_Retailer = RETAILERS.RET_Code LEFT OUTER JOIN
     dbo.FACTORY_OPTIONS FACTORY_OPTIONS 
     ON SO_HEADER.SOH_Upholstery = FACTORY_OPTIONS.FAC_Code LEFT OUTER JOIN
     dbo.FINANCE_HOUSES FINANCE_HOUSES 
     ON SO_HEADER.SOH_Finance = FINANCE_HOUSES.FIN_Code

从 table i-e RANGE_MODEL_Code 和 [ 中更改您的 table 名称和连接键MODEL_Code 根据你的架构

SQL - 添加一个新的 table 加入当所有离开时加入 - 完全初学者

SQL - Add in a new table join when all left join - Total beginner

join

left-join

outer-join