1. A method of displaying information representative of a query for a relational database management system (RDBMS) having screen display means, the query comprising a first portion used by the RDBMS to determine a query execution plan and a second portion comprising elements, the query execution plan comprising operations to be executed by the RDBMS, the operations being interconnected through links, said method comprising: generating a first set of information representative of the query execution plan, said first set of information including operation names for the respective operations of the query execution plan, possible options and at least one characteristic of each of the operations; analyzing said first set of information to select selected information including said operation names, said possible options, said at least one characteristics and the links; performing a syntactical analysis of the query; forming a syntactical graph from said syntactical analysis, said syntactical graph comprising a second set of information including at least one of said elements of said second portion of the query; comparing said selected information from said first set of information with second set of information to select said at least one element; and displaying on said screen display means: said operations in boxes respectively, each of said boxes incorporating said related operation name, possible option and said characteristic; links (28) between said boxes by a linear graphical form; and said at least one element inside at least one box of said boxes.