From Active Database Software:
Active Query Builder is a .Net-ready ActiveX visual query builder compo Active Query Builder ActiveX Edition is a .Net-ready ActiveX visual query builder component that allows your end-users to build complex SQL queries via an intuitive visual interface. The interface of Active Query Builder is similar to either MS-Access or SQL Server visual query construction interface, but is compared to other similar components. Active Query Builder is a true two-way visual query builder that differs from other query builders by its SQL parser that correctly handles SQL queries containing multiple nested joins and other fine points of SQL syntax. Another feature is user-friendly interface that allows you to build queries involving unions and sub-queries.
Active Query Builder supports SQL Server, Oracle, Informix, MySQL, PostgreSQL, InterBase or Firebird, and many other SQL dialects.