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  2. Data Interchange Format - Wikipedia

    en.wikipedia.org/wiki/Data_Interchange_Format

    Data Interchange Format (.dif) is a text file format used to import/export single spreadsheets between spreadsheet programs. Applications that still support the DIF format are Collabora Online , Excel , [ note 1 ] Gnumeric , and LibreOffice Calc .

  3. Data validation - Wikipedia

    en.wikipedia.org/wiki/Data_validation

    Presence check Checks that data is present, e.g., customers may be required to have an email address. Range check Checks that the data is within a specified range of values, e.g., a probability must be between 0 and 1. Referential integrity Values in two relational database tables can be linked through foreign key and primary key.

  4. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    In most implementations, a cell, or group of cells in a column or row, can be "named" enabling the user to refer to those cells by a name rather than by a grid reference. Names must be unique within the spreadsheet, but when using multiple sheets in a spreadsheet file, an identically named cell range on each sheet can be used if it is ...

  5. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Excel offers many user interface tweaks over the earliest electronic spreadsheets; however, the essence remains the same as in the original spreadsheet software, VisiCalc: the program displays cells organized in rows and columns, and each cell may contain data or a formula, with relative or absolute references to other cells.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. US agency warns extended government shutdown could lead to ...

    www.aol.com/news/us-agency-warns-extended...

    By David Shepardson. WASHINGTON (Reuters) - The head of the Transportation Security Administration on Thursday warned that an extended partial U.S. government shutdown could lead to longer wait ...

  8. California land to be returned to Yurok Tribe - AOL

    www.aol.com/california-land-returned-yurok-tribe...

    The tribe is working to bolster the fish's population by building a stream channel, two connected ponds and about 20 acres of floodplain. "You have salmon who provide for humans, but they also ...

  9. 49ers survive 3 missed field goals, sideline fight to win ...

    www.aol.com/sports/san-francisco-survives-three...

    If at first — or second, or third — you don't succeed, try, try again. San Francisco's Jake Moody missed three field goals Sunday afternoon against Tampa Bay, but made one that he needed to ...