Cross-Database Joins

👤 This documentation is intended for SQL Users. SQL Users will need to reach out to their Site administrators to ensure tables are cached within Sisense. 

Note: Cross-Database Joins are only available with the Cache or Warehouse Infrastructure.

In a cross-database join, Sisense pulls information from tables across multiple data sources, as if they existed within the same database. In order to perform a cross-database join, all of the tables in the query must exist on the Sisense Cache. Customers on MySQL and SQL Server may already be familiar with cross-database joins for databases that are on the same host.

Depending on whether the data is cached in the Redshift Cache or Snowflake Cache, the query must use Redshift-compatible or Snowflake-compatible syntax.


Cross database joins use the same syntax as regular single database joins. Using two example database, ExampleOne and ExampleTwo, the example below shows a join between ExampleOne's Dog table in SchemaOne with ExampleTwo's Animal table in SchemaTwo.

Table names can also be aliased to clear up some ambiguity:


If an error is returned while trying to do a cross-database join, ensure that the syntax is Redshift-compatible or Snowflake-compatible depending on the cache infrastructure being used. Ask your Site Administrator to verify that all the tables used in the join are cached.

Our support team is ready to help