What is Tableau blending?

Data blending in Tableau is the operation of combining multiple data sources into the same view by finding common fields between them to join on.

What are the considerations when blending data in Tableau?

Recommendations for Tableau data blending Be aware which data source is the Primary source. Ensure the appropriate data connections are activate in the worksheet. Set up the joins at a high level, the least granular level possible. If filtering the view, set the data source containing the filter fields as Primary.

What is the difference between data blending and data joining in Tableau?

Data Blending allows a combination of data from different data sources to be linked. Whereas, Data Joining works only with data from one and the same source. For example: If the data is from an Excel sheet and a SQL database, then Data Blending is the only option to combine the two types of data.

Why use data blending over initial join in Tableau?

Generally cross-database joins are recommended over data blending as there are fewer limitations. Tables from different data sources can usually be joined using a cross-database join. If the secondary table has a large amount of data then data blending may be faster, because data blending will aggregate the data first.

Why do we blend data?

It concerns not merely the merging of different file formats or disparate sources of data but also different varieties of data. Data blending allows business analysts to cope with the expansion of data that they need to make critical business decisions based on good quality business intelligence.

What types of joins are used in blending?

There are different types of join;

• Left join. Merging contents between 2 tables and also retaining left table details.
• Right Join. Merging contents between 2 tables and also retaining right table details.
• Inner join. Only the common matching data between 2 tables are displayed.
• Full Outer Join.

How many tables can we join in Tableau?

32 tables
Ans: Tableau allows its user to join a maximum of 32 tables.

What is the difference between a union and a join in Tableau?

When you join tables, each row in the result will contain columns from both the tables and rows are created when columns from one table match columns from another. This match is called the join condition. Whereas, UNIONS combine data into new rows.

How do you blend in tableau?

Steps for blending data

1. Ensure that the workbook has multiple data sources.
2. Drag a field to the view.
3. Switch to another data source and make sure there is a blend relationship to the primary data source.
4. Drag a field into the view from the secondary data source.

How does blend data work?

Blending lets you create charts based on multiple data sources, called a blended data source. For example, you can blend two different Google Analytics data sources to measure the performance of your app and website in a single visualization. Blending can reveal valuable relationships between your data sets.