Validating data in excel
There are many techniques for identifying and removing duplicates, but it would be better if you could prevent them in the first place.By using the COUNTIF function in a custom formula we can.Therefore, it must be a date in the past or todays date.Select Date from the Allow list and then Less than or equal to from Data. The TODAY function returns the current date from the computer. Check out more great Excel date functions (https://For example, maybe you only want a drop down list to appear if another cell is not empty.
You can create Data Validation rules that are based on the value from another cell by writing a custom formula.The ISNUMBER function can be used to create a validation rule that only allows the entry of numeric values in a cell.Select Custom from the Allow list and use the formula below.Let’s take our drop down lists further and create dependent lists.For these lists, the item selected in one list will affect what options appear in the next list.
This is a guest post by Alan Murray from Computergaga. It often goes unnoticed as Excel users are eager to learn the highs of Pivot Tables, charts and formulas.