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Introducing the DAX language

From: Excel 2010: Pivot Tables in Depth

Video: Introducing the DAX language

When you create a PowerPivot data model, you can sort, filter, and create a PivotTable to summarize your data. You can also create your own summaries using Data Analysis eXpressions or DAX. DAX expressions are similar to Excel worksheet formulas that you use to summarize values in Excel tables. So just for a quick comparison, if I wanted to find the 2008 sales in the table to the left, I would type =sum( and then we're looking at the values in D3 through D8.

Introducing the DAX language

When you create a PowerPivot data model, you can sort, filter, and create a PivotTable to summarize your data. You can also create your own summaries using Data Analysis eXpressions or DAX. DAX expressions are similar to Excel worksheet formulas that you use to summarize values in Excel tables. So just for a quick comparison, if I wanted to find the 2008 sales in the table to the left, I would type =sum( and then we're looking at the values in D3 through D8.

So type a right parentheses and press Enter and there is the formula for just those cells. If I wanted to find a total of all sales in the Sales column of the table then I would type =sum(, and then the name of the table, which is Table1, so T-A-B-L-E1 and then a left square bracket so that I can start naming the column I want to use, and in this case that is Sales, so I'll type in S and then in the formula AutoComplete list I see that sales is highlighted, so I can press Tab to accept it.

Type a right square bracket to close the table column reference and then a right parentheses to close the sum formula. Press Enter and I get my result. And if I highlight that cell again, I can see that I have the table reference followed by the column reference all as an argument inside of the SUM formula. Now let's shift over to PowerPivot and create a calculated column so that you can see how it compares. So I'll click the PowerPivot tab on the Ribbon and then click the PowerPivot Window button, and here I have my PowerPivot data model.

What I want to do is create a new column that finds the total for each line item, so I will be multiplying Quantity by Price. So I will click in the first cell in the Add Column column, and then type equal. , You'll see the typing here in the Formula Bar as opposed to in the cell. So type equal and then a left square bracket and then I can use the Down Arrow key to select the first field I want, and that's Quantity. Press Tab and then in PowerPivot the program encloses the field name in square brackets, so you don't need to type it in yourself.

Now type an asterisk for multiply, then a left square bracket and we're multiplying by Price, so I'll type a P and the highlighted item is Price so I'll press Tab. Everything looks good. And when I press Enter you'll see the PowerPivot creates a calculated column called CalculatedColumn1 and its values are Quantity times the Price. DAX lets you extend the basic capabilities of PowerPivot by creating expressions that summarize your data. In the rest of this chapter I'll go into more detail on how to use DAX to summarize your data.

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This video is part of

Image for Excel 2010: Pivot Tables in Depth
Excel 2010: Pivot Tables in Depth

66 video lessons · 39645 viewers

Curt Frye
Author

 
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  1. 1m 38s
    1. Welcome
      55s
    2. Using the exercise files
      43s
  2. 38m 8s
    1. Introducing PivotTables
      4m 2s
    2. Formatting data for use in a PivotTable
      4m 31s
    3. Creating a PivotTable
      4m 20s
    4. Pivoting a PivotTable
      3m 47s
    5. Configuring a PivotTable
      3m 23s
    6. Connecting to an external data source
      3m 30s
    7. Connecting to an Access database
      2m 11s
    8. Consolidating data from multiple sources
      4m 37s
    9. Updating and refreshing PivotTable data sources
      4m 21s
    10. Managing PivotTables
      3m 26s
  3. 23m 33s
    1. Adding, removing, and positioning subtotals and grand totals
      3m 27s
    2. Changing the PivotTable data field summary operation
      4m 35s
    3. Summarizing more than one data field
      3m 16s
    4. Creating a calculated field
      2m 27s
    5. Grouping PivotTable fields
      3m 17s
    6. Using PivotTable data in a formula
      4m 47s
    7. Drilling down to the underlying data
      1m 44s
  4. 28m 9s
    1. Sorting PivotTable data
      2m 0s
    2. Creating a custom sort order
      2m 48s
    3. Filtering a PivotTable field by selection
      2m 59s
    4. Filtering a PivotTable by rule
      2m 56s
    5. Filtering a PivotTable using a search filter
      3m 10s
    6. Filtering a PivotTable using slicers
      4m 2s
    7. Formatting slicers
      3m 43s
    8. Filtering a PivotTable with report filter fields
      5m 2s
    9. Clearing and reapplying PivotTable filters
      1m 29s
  5. 15m 2s
    1. Applying a PivotTable style
      5m 5s
    2. Creating a PivotTable style
      4m 37s
    3. Changing the PivotTable layout
      3m 20s
    4. Changing the data field number format
      2m 0s
  6. 24m 33s
    1. Highlighting cells by applying a rule
      2m 54s
    2. Highlighting the top or bottom values in a PivotTable
      3m 30s
    3. Formatting PivotTable cells using data bars
      3m 50s
    4. Formatting PivotTable cells using color scales
      3m 40s
    5. Formatting PivotTable cells using icon sets
      2m 45s
    6. Editing conditional formatting rules
      2m 15s
    7. Controlling how multiple rules are applied
      3m 28s
    8. Deleting a conditional formatting rule
      2m 11s

    1. Creating a PivotChart
      3m 29s
    2. Pivoting a PivotChart
      3m 5s
    3. Filtering a PivotChart
      3m 45s
    4. Formatting a PivotChart
      3m 35s
    5. Changing a PivotChart layout
      3m 14s
    6. Changing a PivotChart chart type
      4m 30s
    7. Adding a trendline to a PivotChart
      2m 22s
  7. 9m 27s
    1. Printing a PivotTable
      4m 2s
    2. Printing each item on its own page
      3m 30s
    3. Printing a PivotChart
      1m 55s
  8. 13m 30s
    1. Recording and reviewing a macro
      4m 10s
    2. Running a macro
      5m 57s
    3. Creating a simple PivotTable presentation kit
      3m 23s
  9. 19m 17s
    1. Introducing PowerPivot
      2m 9s
    2. Downloading and installing PowerPivot
      2m 36s
    3. Importing PowerPivot data
      3m 14s
    4. Managing table columns
      4m 1s
    5. Adding tables to a PowerPivot model
      2m 27s
    6. Creating relationships between tables
      4m 50s
  10. 24m 30s
    1. Introducing the DAX language
      2m 58s
    2. Using DAX operators
      4m 44s
    3. Surveying DAX functions
      2m 40s
    4. Adding calculated columns and measures
      4m 22s
    5. Using aggregate functions
      4m 24s
    6. Using filters in aggregate functions
      5m 22s
  11. 59s
    1. Additional resources
      59s

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