1,Connect an External Data Source, 添加新的数据源,填写如下
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221024572-1081163674.png)
2, 点击Validate and Sync 按钮
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221050589-2145535406.png)
3,添加Orders和Orders Details
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221105168-1649487243.png)
4,观察外部数据,创建Tab后,点击Order可以看到数据
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221129295-442310126.png)
5,转换 Order Detail 的 Order ID 的类型为 External Object ID 链接 Order
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221148499-1151950090.png)
6, 标准和自定义Object 引用 外部数据
引用流程都和外部引用都是一致的,不过再转换External ID的时候选择的是 internal lookup.
![](https://images2015.cnblogs.com/blog/32287/201609/32287-20160918221208470-1881747684.png)