Finding Duplicate Values in a Data List
by Curtis D. Frye
Microsoft® Office Excel® 2007 Plain & Simple
- Microsoft® Office Excel® 2007 Plain & Simple
- SPECIAL OFFER: Upgrade this ebook with O’Reilly
- Acknowledgments
- 1. Introduction: About This Book
- 2. What’s New in Excel 2007?
- 3. Getting Started with Excel 2007
- Surveying the Excel Screen
- Starting Excel
- Finding and Opening Existing Workbooks
- Using File Properties
- Creating a New Workbook
- Working with Multiple Workbooks
- Sizing and Viewing Windows
- Zooming In or Out on a Worksheet
- Viewing a Worksheet in Full Screen Mode
- Saving and Closing an Excel Workbook
- Using the Excel Help System
- 4. Building a Workbook
- Understanding How Excel Interprets Data Entry
- Navigating the Worksheet
- Selecting Cells
- Entering Text in Cells
- Entering Numbers in Cells
- Entering Dates and Times in Cells
- Entering Data with Other Shortcuts
- Creating a Data Table
- Editing Cell Contents
- Inserting a Symbol in a Cell
- Creating Hyperlinks
- Cutting, Copying, and Pasting Cell Values
- Undoing or Redoing an Action
- Finding and Replacing Text
- Checking the Spelling of Your Worksheet
- 5. Managing and Viewing Worksheets
- Viewing and Selecting Worksheets
- Renaming Worksheets
- Moving Worksheets
- Copying Worksheets
- Inserting and Deleting Worksheets
- Hiding or Showing a Worksheet
- Changing Worksheet Tab Colors
- Inserting, Moving, and Deleting Cells
- Inserting, Moving, and Deleting Columns and Rows
- Hiding and Unhiding Columns and Rows
- Entering Data and Formatting Many Worksheets at the Same Time
- Changing How You Look at Excel Workbooks
- Naming and Using Worksheet Views
- 6. Using Formulas and Functions
- Understanding Formulas and Cell References in Excel
- Creating Simple Cell Formulas
- Assigning Names to Groups of Cells
- Using Names in Formulas
- Creating a Formula that References Values in a Table
- Creating Formulas that Reference Cells in Other Workbooks
- Summing a Group of Cells without Using a Formula
- Creating a Summary Formula
- Summing with Subtotals and Grand Totals
- Exploring the Excel Function Library
- Using the IF Function
- Checking Formula References
- Debugging Your Formulas
- 7. Formatting the Worksheet
- Formatting Cell Contents
- Formatting Cells Containing Numbers
- Formatting Cells Containing Dates
- Adding Cell Backgrounds and Shading
- Formatting Cell Borders
- Defining Cell Styles
- Aligning and Orienting Cell Contents
- Formatting a Cell Based on Conditions
- Changing How Conditional Formatting Rules Are Applied
- Displaying Data Bars, Icon Sets, or Color Scales Based on Cell Values
- Copying Formats with the Format Painter
- Merging or Splitting Cells or Data
- 8. Formatting the Worksheet
- Applying Workbook Themes
- Coloring Sheet Tabs
- Changing a Worksheet’s Gridlines
- Changing Row Heights and Column Widths
- Inserting Rows or Columns
- Moving Rows and Columns
- Deleting Rows and Columns
- Outlining to Hide and Show Rows and Columns
- Hiding Rows and Columns
- Protecting Worksheets from Changes
- Locking Cells to Prevent Changes
- 9. Printing Worksheets
- Previewing Worksheets Before Printing
- Printing Worksheets with Current Options
- Choosing Whether to Print Gridlines and Headings
- Choosing Printers and Paper Options
- Printing Part of a Worksheet
- Printing Row and Column Headings on Each Page
- Setting and Changing Print Margins
- Setting Page Orientation and Scale
- Creating Headers and Footers
- Adding Graphics to a Header or a Footer
- Setting and Viewing Page Breaks
- 10. Customizing Excel to the Way You Work
- 11. Sorting and Filtering Worksheet Data
- 12. Summarizing Data Visually Using Charts
- 13. Enhancing Your Worksheets with Graphics
- Working with Graphics in Your Worksheets
- Adding Graphics to Worksheets
- Adding Drawing Objects to a Worksheet
- Adding Fills to Drawing Objects
- Adding Effects to Drawing Objects
- Customizing Pictures and Objects
- Aligning and Grouping Drawing Objects
- Using WordArt to Create Text Effects in Excel
- Inserting Clip Art into a Worksheet
- Inserting and Changing a Diagram
- Creating an Organization Chart
- 14. Sharing Excel Data with Other Programs
- 15. Using Excel in a Group Environment
- About the Author
- Choose the Right Book for You
- Index
- About the Author
- SPECIAL OFFER: Upgrade this ebook with O’Reilly
When you maintain organizational records in an Excel data list, you must be careful not to enter an order, customer, or supplier into your list more than once. As an example, suppose that you own a business and accidentally created two customer information records for the same customer. If you generate a mass mailing, that customer would receive two copies of your mailer, costing you money. What’s worse, if you and your employees don’t realize the customer is in your list twice, and each entry has its own CustomerID value (like the customer number you see on catalogs mailed to your home or business), you could end up assigning some sales to one ID and some to the other. Should the customer call to ask about an order, your employees might not be able to find it because they’re looking up the customer’s information using the "wrong" CustomerID value.
Select and clear check boxes to indicate the columns you want Excel to consider when it searches for duplicate rows.
Click OK to clear the message box indicating how many rows were deleted and how many remain.Caution
Excel doesn’t ask whether you want to delete the rows; it just deletes them. Clicking the Undo button on the Quick Access Toolbar will restore the rows to the list, but if your list has fewer than a few hundred rows, you should consider using a combination of sorting and filtering to identify duplicate entries.
-
No Comment