On this tab, you can see a list of database queries related to the selected system table. Queries in the list can be Edited () or Deleted (). New queries can be created using the New query link.
More information about system tables can be found in Developer's Guide -> Development -> System tables and custom fields.
Page url: http://devnet.kentico.com/docs/5_5r2/contexthelp/index.html?system_tables_queries.htm