We built another data model to provide content for horizontal and vertical menu buttons that control the content of the headers and the table.
我们构建另一个数据模型为控制标题栏和表的内容的水平和垂直菜单按钮提供内容。
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By making a view, rather than an explicit table, we avoid the main disadvantage of a vertical schema, namely that many queries require it to be joined with itself, which can be expensive.
You should also observe that the table has identical looking and equally serviceable horizontal and vertical headers that are distinguished from the table's body.