Macros for validating data in excel

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So, for weekdays (Mon to Fri) the result of the formula should be less than 6, and for weekends (Sat and Sun) greater than 5.

Allow only workdays: In many situations, you may want to use today's date as the start date of the allowed date range.

If you want to validate cells with your own criteria, create a custom validation rule based on a formula.

Here's how: Optionally, you can add a custom input message and Error alert that will show up when the user selects the validated cell or enters invalid data, respectively.

Data Validation Example | Create Data Validation Rule | Input Message | Error Alert | Data Validation Result Use data validation in Excel to make sure that users enter certain values into a cell. On the Data tab, in the Data Tools group, click Data Validation.

In this example, we restrict users to enter a whole number between 0 and 10.

Please pay attention that we lock the range with absolute cell references (A:$A) and use a relative reference for the top cell (A2) to get the formula to adjust properly for each cell in the validated range.

Excel date validation provides quite a lot of predefined criteria to restrict users to entering only dates between the two dates you specify, greater than, less than, or equal to a given date.

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In yesterday's tutorial we started to look at Excel Data Validation - what its purpose is, how it works, and how to use built-in rules to validate data in your worksheets.

But this can be easily done with a custom data validation formula based on the ISNUMBER function, like this one: Where D2 is the uppermost cell of the selected range.

If all values in a certain range should begin with a particular character or substring, then do Excel data validation based on the COUNTIF function with a wildcard character: In the above formula, the LEFT function extracts the first 3 characters from cell A2, and EXACT performs a case-sensitive comparison with the hard-coded substring ("AA-" in this example).

To better illustrate the point, please consider the following example.

Supposing, you want to restrict data entry in cells D2 to D5 to whole numbers between 1 (minimum value) and the result of dividing A2 by B2.

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