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How to use data validation to prevent blank cells left in Excel column?

In some cases, you do not allow the blank cells left in a column which means that must enter something in cells of a column. In this article, I will introduce the Data Validation function to handle this job in Excel.

Prevent blank cells left in a column by Data Validation

Prevent duplicate data in a column by Prevent Duplicategood idea3

Prevent blank cells left in a column by Data Validation

To prevent blank cells left in a column, you just need to use a simple formula in Data Validation function.

1. Select the column you want to prevent blank cells left, click Data > Data Validation.
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2. Under Settings tab, select Custom from Allow drop-down list, then type this formula >=COUNTIF($F$1:$F1,"")=0 into Formula textbox.
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F1 is the first cell in the selected column.

3. Click OK. From now, if you left a blank cell and jump to next cell to enter value, a warning box will pop out to stop you.
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Prevent duplicate data in a column by Prevent Duplicate

If you want to prevent duplicate data entry in a column, you can try Kutools for Excel’s Prevent Duplicate utility.

Kutools for Excel, with more than 300 handy functions, makes your jobs more easier. 

After installing Kutools for Excel, please do as below:(Free Download Kutools for Excel Now!)

Select the column you want to prevent duplicate entry, click Kutools > Prevent Typing > Prevent Duplicate.
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Then click Yes > OK to close the reminders.

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From now on, it will pop out a warning to stop duplicate entering.
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