In Tableau, there are various types of connections that allow you to connect to different data sources. Let’s explore each type in detail:
A live connection is a direct connection between Tableau and the data source. With a live connection, any changes made to the data source are immediately reflected in Tableau. This type of connection is ideal when you need real-time access to your data.
An extract connection creates an optimized snapshot of your data source in Tableau. This allows for faster performance and offline access to your data. When you create an extract, you can choose which fields and tables to include, apply filters, and aggregate the data as needed.
Advantages of Extract Connection:
- Improved Performance: Extracts are optimized for fast querying and analysis, resulting in quicker response times.
- Offline Access: With an extract, you can work with your data even when you’re not connected to the original source.
- Data Reduction: Extracts can be customized to only include relevant fields and aggregated data, reducing the size of the extract and improving efficiency.
A federated connection allows you to connect to multiple data sources simultaneously. This type of connection is useful when your data resides in different databases or files. By combining multiple sources into a single view, you can gain deeper insights by analyzing them together.
Types of Federated Connections:
- In-Database Join: In this approach, Tableau pushes the query directly to each database and performs joins at the database level before returning the combined results.
- Union: With a union, you can combine tables with similar structures into a single table. Tableau will create a virtual table that represents the unioned data.
- Blending: Blending allows you to connect to multiple data sources without performing an actual join. Each data source is queried separately, and Tableau blends the results together based on common dimensions.
In conclusion, Tableau provides different types of connections to accommodate various data scenarios. Whether you need real-time access, offline capabilities, or the ability to combine multiple sources, Tableau has you covered. Choose the connection type that best suits your needs and start gaining valuable insights from your data!