1. A database interface, comprising: a user interface device including at least one processor configured to form a representation of a first query of a database in response to an input, to transmit the first query of the database, to receive a result of the first query, to receive a recommendation to change the first query, to present for display a representation of the result of the first query, to present for display a representation of the recommendation to change the first query, to transmit a second query of the database in response to another input, to receive a result of the second query, and to present for display a representation of the result of the second query; wherein the first query has a parameter that corresponds to an object in a set, the recommendation to change the first query includes at least one child of the object and at least one parent of the object, and the second query corresponds to a child of the object or parent of the object selected from the recommendation to change the first query.