PSQRYFIELD: Stores all fields used in a query (both the fields in the Select and Where clause).

PSQRYCRITERIA: Stores criteria query fields. You can get the name of the fields by joining the PSQRYFIELD table.

PSQRYEXPR: Stores query expressions.

PSQRYBIND: Stores query bind variables.

PSQRYRECORD: Stores all records used in all aspects of query creation

PSQRYSELECT: Stores all SELECT requirements by select type. Example would be sub select, join, ect.

PSQRYLINK: Stores the relationships to child queries.

PSQRYEXECLOG: Query run time log table that stores (only 8.4x and higher)

PSQRYSTATS: Query run time statistics table such as count of query execution, and date time of last execution (only in 8.4x and higher).