Just as the navigational approach would require programs to loop in order to collect records, the relational approach would require loops to collect information about any one record. Codd's solution to the necessary looping was a set-oriented language, a suggestion that would later spawn the ubiquitous SQL. Using a branch of mathematics known as tuple calculus, he demonstrated that such a system could support all the operations of normal databases (inserting, updating etc.) as well as providing a simple system for finding and returning sets of data in a single operation.
నావిగేషనల్ సిస్టమ్ను ఉపయోగించి ఒక ప్రోగ్రామ్ సమాచారాన్ని ఎలా సేకరిస్తుంది?
require programs to loop