This lesson shows you how to group data in your pivot table by date. You can group by day, week, month, quarter or year. If your date fields include a time value, you can also group by seconds, minutes or hours. You'll also learn how to collapse and expand data groups in your pivot table so you can quickly see a summary of your data.

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This Pivot Table lesson shows you how to use the Pivot Table Field Layout to quickly change the layout of your pivot table. This allows you to try different pivot table layouts so you can be sure your data is being grouped, aggegated and displayed in the most useful way possible. It also allow you to generate multiple reports from the same underlying data without having to create multiple pivot tables.

The SUMIFS function in Excel allows you to sum the values in a range of cells that meet multiple conditions, or criteria. For example, you might use the SUMIFS function in a sales spreadsheet to to add up the **value of sales** of a **specific product** by a **given sales person** (e.g. the value of all sales of a microwave oven made by John). This lesson explains how to use SUMIFS.

When you create a new Pivot Table, Excel either uses the source data you selected or automatically selects the data for you. But data changes often, which means you also need to be able to update your pivot tables to reflect the new or changed data. This lesson shows you how to **update existing data**, and **add new data** to an Excel pivot table.

If you have a column of numbers and you want to calculate a running total of the numbers alongside, you can use the SUM() formula combined with a clever use of absolute and relative references.

If you're using the Autofilter feature, you're probably wondering how to perform calculations on only those values that are being displayed by the filter. The SUBTOTAL() function is the answer.

If you're using Word to present a table of data that includes numbers, you can use Word's built in formulas to add up those numbers rather than manually calculate them each time they change. This can also eliminate the possibility of error - particularly important if you're producing a sales proposal or an important report.

The SUMPRODUCT function allows you to multiply two arrays of numbers together (e.g. Quantity Sold and Price Per Unit) and add the results each individual calculation together. Without the SUMPRODUCT function, you'll find yourself having to create a third column in which you multiply the Quantity by Price for each row, and then find the sum of all the individual formulas. This lesson shows you how to use SUMPRODUCT to do all that with just one formula.

The IF() function in Excel allows you to evaluate a situation which has two possible outcomes (e.g. sales are greater than $1000) and calculate a different value for each outcome. However, sometimes you need to work with situations where there are more than two possible outcomes. That's where multiple, or nested, IF functions come in handy. In this tutorial we'll cover how to use nested IF functions to calculate sales commission for a team of sales people, given a range of different commission rates.

This lesson introduces the LEN() function, which allows you to calculate the number of characters in a cell. This formula is useful on its own, or can be combined with other text functions such as RIGHT(), LEFT(), MID() and FIND().

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