A useful scenario is to use a UNION ALL view to model a merger, where each branch of the UNION ALL operation represents data from a branch or division of a company.
一个有用的场景是使用UNION ALL视图来为合并建模，其中UNION ALL操作的每个分支表示来自一个分公司或公司某部门的数据。
My company is the domestic important vehicle importer-exporter, the branch is all over each big city city of China.
我公司是国内重要的车辆进出口商，分公司遍及中国各大城市。
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