This text is for the reader who is familiar with dBASE II and dBASE III and wishes to sharpen his/her programming skills with an upgrade to dBASE IV Release 1.1. The guide deals with all of the dBASE IV commands, functions, and system variables needed to program in dBASE IV and provides detailed examples. A large commercial application is developed. In addition, the guide provides a thorough introduction to SQL, with each command explained in full along with a wealth of applications. Professional dBASE IV and SQL Programming contains the techniques used by the pros who program in dBASE IV, and the examples presented were culled from professional systems costing thousands of dollars to develop.