With most Excel spreadsheets, you enter data manually into cells and then use formulas or other functions to analyze it or perform calculations. If you have a large data source, such as an Access ...

Microsoft Excel worksheets are convenient places to store limited amounts of data. Excel is a spreadsheet application, but an Excel file can also serve as a database for your website if you can ...

Use Excel data validation to prevent duplicate values in a column Your email has been sent Prevent duplicates before they happen by combining a simple function with data validation. Excel has built-in ...