For each document in the database that has name and amount fields with non-null values, a result row is created in the view.
对于数据库中包含具有非空值的名称和金额字段的每个文档来说,将在视图中创建一个结果行。
Before leaving the view, deselect the selected row.
在退出该视图以前,请取消选定行。
Select the first row, and from the Command menu choose View the message.
选择第一行并在Command菜单中选择View the message。
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