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Microsoft Access Data Types

As stated on Monday, I have started a series on different database types for various data programs. (Microsoft SQL Server, MY SQL and Access) My goal here is to document the different data types and categories that reflect basic information about them.

This is the Microsoft Access Data Types (for old school reasons)

Data type Description Storage
Text Use for text or combinations of text and numbers. 255 characters maximum  
Memo Memo is used for larger amounts of text. Stores up to 65,536 characters. Note: You cannot sort a memo field. However, they are searchable  
Byte Allows whole numbers from 0 to 255 1 byte
Integer Allows whole numbers between -32,768 and 32,767 2 bytes
Long Allows whole numbers between -2,147,483,648 and 2,147,483,647 4 bytes
Single Single precision floating-point. Will handle most decimals 4 bytes
Double Double precision floating-point. Will handle most decimals 8 bytes
Currency Use for currency. Holds up to 15 digits of whole dollars, plus 4 decimal places. Tip: You can choose which country’s currency to use 8 bytes
AutoNumber AutoNumber fields automatically give each record its own number, usually starting at 1 4 bytes
Date/Time Use for dates and times 8 bytes
Yes/No A logical field can be displayed as Yes/No, True/False, or On/Off. In code, use the constants True and False (equivalent to -1 and 0). Note: Null values are not allowed in Yes/No fields 1 bit
Ole Object Can store pictures, audio, video, or other BLOBs (Binary Large OBjects) up to 1GB
Hyperlink Contain links to other files, including web pages  
Lookup Wizard Let you type a list of options, which can then be chosen from a drop-down list 4 bytes

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