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Data types in Data Models - Microsoft Support
In a Data Model, each column has an associated data type that specifies the type of data the column can hold: whole numbers, decimal numbers, text, monetary data, dates and times, and so on. Data type also determines what kinds of operations you can do on the column, and how much memory it takes to store the values in the column.
Open files from the File menu - Microsoft Support
Learn how to search for and open files from your Microsoft Office app. Browse recently opened files and folders using shortcuts.