PowerPivot - relationship cannot be created because each column contains duplicate values
Video: Relationships in Power View and Power Pivot. Add more power to your data analysis by creating relationships amogn different tables. A relationship is a . Create Your Own Relationships Between Tables In The Excel Data Why are we doing this when there clearly aren't any duplicate values in this column? Open the Power Pivot window and you will see that not only have. In the first tutorial, Import Data into and Create a Data Model, an Excel It also opens the Power Pivot add-in, which you use to perform the remaining steps in this task. field in the Events table consists of unique, non-repeated values.
Adjacent to the existing columns is an empty column titled Add Column. Power Pivot provides that column as a placeholder. There are many ways to add a new column to a table in Power Pivot, one of which is to simply select the empty column that has the title Add Column.
In the formula bar, type the following DAX formula. As you type, AutoComplete helps you type the fully qualified names of columns and tables, and lists the functions that are available. Use tab to select AutoComplete suggestions.
You can also just click the column while typing your formula, and Power Pivot inserts the column name into your formula. Values are populated for all the rows in the calculated column. Such fields are called a primary key. You can rename any column by double-clicking it, or by right-clicking the column and choosing Rename Column. When completed, the Hosts table in Power Pivot looks like the following screen. The Hosts table is ready.
Start by creating a new column in the Medals table, like we did for Hosts. Notice that Add Column is selected. This has the same effect as simply selecting Add Column. The Edition column in Medals has a different format than the Edition column in Hosts. Before we combine, or concatenate, the Edition column with the Season column to create the EditionID column, we need to create an intermediary field that gets Edition into the right format.
In the formula bar above the table, type the following DAX formula. Values are populated for all the rows in the calculated column, based on the formula you entered. Rename the column by right-clicking CalculatedColumn1 and selecting Rename Column. Type Year, and then press Enter. When you created a new column, Power Pivot added another placeholder column called Add Column.
In the formula bar, type the following DAX formula and press Enter. Sort the column in ascending order. The Medals table in Power Pivot now looks like the following screen. Notice many values are repeated in the Medals table EditionID field.
What is unique in the Medals table is each awarded medal. The unique identifier for each record in the Medals table, and its designated primary key, is the MedalKey field.
Create a relationship between tables in Excel - Office Support
The next step is to create a relationship between Hosts and Medals. You can also switch between Grid view and Diagram view using the buttons at the bottom of the PowerView window, as shown in the following screen. Expand Hosts so you can view all of its fields. We created the EditionID column to act as the Hosts table primary key unique, non-repeated fieldand created an EditionID column in the Medals table to enable establishment of a relationship between them.
We need to find them both, and create a relationship. Power Pivot provides a Find feature on the ribbon, so you can search your Data Model for corresponding fields. Position the Hosts table so that it is next to Medals. Power Pivot creates a relationship between the tables based on the EditionID column, and draws a line between the two columns, indicating the relationship. In this section, you learned a new technique for adding new columns, created a calculated column using DAX, and used that column to establish a new relationship between tables.
You can also use the associated data to create additional PivotTables, PivotCharts, Power View reports, and much more. Create a hierarchy Most Data Models include data that is inherently hierarchical. Common examples include calendar data, geographical data, and product categories. Creating hierarchies within Power Pivot is useful because you can drag one item to a report — the hierarchy — instead of having to assemble and order the same fields over and over. The Olympics data is also hierarchical.
For each sport, there is one or more associated disciplines sometimes there are many. And for each discipline, there is one or more events again, sometimes there are many events in each discipline. The following image illustrates the hierarchy. You then use these hierarchies to see how hierarchies make organizing data easy in PivotTables and, in a subsequent tutorial, in Power View. Expand the Events table so that you can more easily see all of its fields. Press and hold Ctrl, and click the Sport, Discipline, and Event fields.
With those three fields selected, right-click and select Create Hierarchy.
How to use Excel's Data Model to turn related data into meaningful information - TechRepublic
A parent hierarchy node, Hierarchy 1, is created at the bottom of the table, and the selected columns are copied under the hierarchy as child nodes. Verify that Sport appears first in the hierarchy, then Discipline, then Event. Double-click the title, Hierarchy1, and type SDE to rename your new hierarchy. You now have a hierarchy that includes Sport, Discipline and Event.
Your Events table now looks like the following screen. Create a Location hierarchy Still in Diagram View in Power Pivot, select the Hosts table and click the Create Hierarchy button in the table header, as shown in the following screen.
An empty hierarchy parent node appears at the bottom of the table. Type Locations as the name for your new hierarchy. There are many ways to add columns to a hierarchy.
Ensure that your hierarchy child nodes are in order.
Easy steps to make data Relationships work in Excel
From top to bottom, the order should be: If your child nodes are out of order, simply drag them into the appropriate ordering in the hierarchy. Your table should look like the following screen. Your Data Model now has hierarchies that can be put to good use in reports.
In the next section, you learn how these hierarchies can make your report creation faster, and more consistent. Use hierarchies in PivotTables Now that we have a Sports hierarchy and Locations hierarchy, we can add them to PivotTables or Power View, and quickly get results that include useful groupings of data. Prior to creating hierarchies, you had to add individual fields to the PivotTable, and arrange those fields how you wanted them to be viewed. In this section you use the hierarchies created in the previous section to quickly refine your PivotTable.
Then, you create the same PivotTable view using the individual fields in the hierarchy, just so you can compare using hierarchies to using individual fields. Go back to Excel. Make sure the PivotTable is selected which is now quite small, so you can choose cell A1 to make sure your PivotTable is selected.
Your nearly empty PivotTable should look like the following screen. Use this spreadsheet to practice these techniques Why create a Relationship? Relationships provide a way to extract data from multiple tables to complete your report. Using the Order ID to create a relationship between the Sales and Order tables lets you extract the name from the Order table and use it in your Sales report. In Excel, columns equate to fields in a database. We want to report on regional sales where each state or territory is allocated to a region.
We have a separate table which lists the states and territories and their respective regions — see Figure 1. They have been named tblSales and tblStates respectively. I highly recommend using the Format as Table feature as it tells Excel to treat the table as a database table.
The companion video includes more details about Format As Table. Figure 2 This opens the Manage Relationships dialog, see Figure 3. The bottom dialog in Figure 4 has the selections necessary to create the relationship between the two tables.
Figure 4 The dropdowns on the left allow you to select a table name. The dropdowns on the right list all the column names in the table selected.Highline Excel 2016 Class 14: VLOOKUP as Relationship in Power Pivot Data Model & Vice Versa
You need to select the shared column in both tables. This example shows that the names of the columns can be different. This is a simple example and in practice you may need to create multiple relationships between multiple tables to get to the data you need. Relationships between tables can be complex. Once created, the relationship will be listed in the Manage Relationship dialog, see Figure 5. Figure 5 Now you can create a PivotTable report based on the two tables.