Schema, Database Management System

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difference between internal schema and external schema in DBMS

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What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct

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Cartesian product, If R1 and R2 are two relations or functions, then the re...

If R1 and R2 are two relations or functions, then the result of R3 = R1 × R2 is the combination of tuples that are in R1 and R2. The product is associative and commutative. Degr

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