利用数据有效性对负数库存说“不”

Negative inventory levels are a nightmare for any business. They can lead to overselling, lost sales, and frustrated customers. But what if there was a way to prevent negative inventory from happening in the first place?

There is! And it's called data validation.

Data validation is a feature in Excel that allows you to specify the types of data that can be entered into a cell. For example, you can specify that a cell can only contain numbers, or that it must be greater than or equal to a certain value.

In the case of inventory management, you can use data validation to prevent users from entering negative values into inventory cells. This will ensure that your inventory levels are always accurate and up-to-date.

To set up data validation, simply follow these steps:

1. Select the cells that you want to validate.
2. Go to the Data tab and click on the Data Validation button.
3. In the Data Validation dialog box, select the "Custom" option from the Allow drop-down menu.
4. In the Formula field, enter the following formula:

=IF(A1<0,"Invalid",A1)

This formula will check to see if the value in cell A1 is less than 0. If it is, the formula will return the text "Invalid". Otherwise, the formula will return the value in cell A1.

5. Click on the OK button.

Your data validation is now set up! Any time a user tries to enter a negative value into one of the selected cells, they will see an error message.

Data validation is a powerful tool that can help you to improve the accuracy and efficiency of your Excel workbooks. By using data validation to prevent negative inventory levels, you can save yourself a lot of time and hassle.