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Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
Explain the two types of participation constraint. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
List any two significant differences between a file processing system and a DBMS. File Processing System vs. DBMS Data Independence - Data independence is the capacity t
i am not clear with the climetic condition of the north indian plain. can u plz explain it for me
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def
Suppose that in an organisation, an employee may do different roles in dissimilar projects. Say, RAM is doing coding in one project and doing designing in another. Suppose that the
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