Query bands can also be used to improve performance. When connecting to Teradata, you can define a map between the name of the attributes passed into the query band and the corresponding values from Tableau. To set up query banding: On the data source page, select Data > Query Banding and Initial SQL
Start Tableau and under Connect, select MySQL. ... If Tableau can't make the connection, verify that your credentials are correct. If you still can't connect, your computer is having trouble locating the server. Contact your network administrator or database administrator.