Provided herein are systems and methods for an application connector (also referred to as a reverse extract, transform, load (ETL) connector) in a database system. For example, a method includes retrieving, by at least one hardware processor, configuration information associated with an application executing on an application server. The configuration information identifies a query. The method further includes executing the query to obtain a query result. The method further includes performing an update of the application at the application server using the query result.