1. A computer-implemented method comprising: from a workload set, identifying a set of database query language statements for automatic tuning; wherein the workload set comprises database query language statements and performance data for the database query language statements; automatically tuning a particular database query language statement from the set of database query language statements; wherein automatically tuning the particular database query language statement comprises generating a set of one or more tuning recommendations for the particular database query language statement; executing the particular database query language statement in a test; wherein executing the particular database query language statement in the test comprises: enabling a first tuning recommendation from the set of one or more tuning recommendations in an environment; and gathering performance data about the execution of the particular database query language statement in the test; comparing the performance data about execution of the particular database query language statement in the test with performance data about the particular database query language statement in the workload set; and based on at least one result of the comparison, determining whether to implement a second tuning recommendation from the set of one or more tuning recommendations in a non-test environment.