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About: Object–relational impedance mismatch     Goto   Sponge   NotDistinct   Permalink

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The object–relational impedance mismatch is a set of conceptual and technical difficulties that are often encountered when a relational database management system (RDBMS) is being served by an application program (or multiple application programs) written in an object-oriented programming language or style, particularly because objects or class definitions must be mapped to database tables defined by a relational schema. The term object–relational impedance mismatch is derived from the electrical engineering term impedance matching.