Can you do temp tables in Tableau custom SQL?
While you can’t create temporary tables in a custom SQL statement in Tableau…. you CAN create temporary tables using an “initial SQL” statement. You can then leverage those temporary tables when you run your custom SQL. I then executed my custom SQL query on the final temp table that contained the data I needed.
Can you create a temp table in Tableau?
Temp Table Creation. A temp table is created when a workbook is opened on Tableau Desktop or when a user signs into Tableau Server and accesses a view. These temp tables are stored in the temporary storage of the data source the view is connected to, and can be identified in the database by the #Tableau prefix.
How do I change the initial SQL in Tableau?
Within Tableau desktop, right click on the data source and select Create Local Copy. Pick a save as location as necessary. Right click again on the new local data source and select Edit Data Source. Click on the data source to make the menu appear and select Initial SQL.
How do I create an initial SQL in Tableau?
To use initial SQL Or, on the Data Source page, select Data > Initial SQL or Data > Query Banding and Initial SQL depending on the database you connect to. Enter the SQL command into the Initial SQL dialog box. You can use the Insert drop-down menu to pass parameters to your data source.
Can you use CTE in Tableau custom SQL?
Initial SQL is not passed in a subquery, so can be used for a CTE.
Can Tableau use stored procedures?
Use a Stored Procedure. A stored procedure is a subroutine available to applications that access a relational database system. When you connect to a SAP Sybase ASE, Microsoft SQL Server, or Teradata database with Tableau, you can use a stored procedure to define the connection.
How do I edit a custom SQL Tableau?
To edit a custom SQL query
- On the data source page, in the canvas, double-click the custom SQL query in the logical layer.
- Hover over the custom SQL table in the physical layer until the arrow displays.
- Click the arrow and then select Edit Custom SQL Query.
- In the dialog box, edit the custom SQL query.
Does custom SQL slow down Tableau?
Using custom SQL to connect to a data source causes slow performance in Tableau Desktop.
What is initial SQL in Tableau?
Tableau 9.3 brings a wonderful new feature called Initial SQL with Parameters which allows you to declare a specific set of SQL commands to be run before any queries within a particular Tableau Server user’s session.
What is CTE in Tableau?
Common Table Expressions (CTE’s) – Sql Server. Tableau Economy.
Can you use declare in Tableau?
So the short answer is, you can’t use DECLARE like you intend. The long answer is that without declaring the variable in SQL you just have to refer to the parameter value all the time within your custom SQL.
Can Tableau pass a parameter to a stored procedure?
Tableau has supported Stored Procedures in Microsoft SQL Server (and Sybase and Teradata) since version 8.1, and you can connect the SP parameters to Tableau parameters.
How do I create a temp table in tableau?
Utilizing SQL Server as an example – you can make use of Initial SQL. From here you can type out your SQL to generate temp tables. Then, in your custom SQL you can reference that temp table. (I realize This can then be published on the Tableau server and works as normal. The temp table will drop when the user session ends.
How do I create a temp table in SQL Server?
Utilizing SQL Server as an example – you can make use of Initial SQL. From here you can type out your SQL to generate temp tables. Then, in your custom SQL you can reference that temp table.
What happens to the temp table when the user session ends?
The temp table will drop when the user session ends. This is very beneficial for smaller datasets that are performant in which you don’t want to go through the pain of creating a stored procedure. However – the downside is that the Initial SQL code can be hidden from anyone else trying to develop on the dashboard.