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Desirable Properties Of Decomposition
Decomposition is a process of dividing a relation into its projections that will not be disjoint. Please remind the Relational projection operator and keep in mind no duplicate tuples are allowed in a projection.
Desirable properties of decomposition are given below:
Construct an ER diagram for a hospital along with a set of patients and a set of medical doctors Associate with every patient a log of the several tests and examinations conducted.
System R was developed and designed over a period of 1974-79 at IBM San Jose Research Company. Its purpose was to illustrate that it is possible to create a Relational System tha
File Organisation And Its Types Just as arrays, trees, lists and other data structures are used to execute data Organisation in main memory, a number of planning's are used to
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
How to Insert data in your table from another table? insert into e.g, To insert tuples from employee into N_emp created above, use following statement Insert into N_emp
How do I use strap on?#
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
which component of DBMS can be embedded in a program? The data manipulation language (DML) is a component which is embedded in a program.
Define According to the levels of abstraction, the schema at the intermediate level is called Ans: As per to the levels of abstraction, the schema at the intermediate level is
For every multivalued attribute 'A', we make a new relation R that contains an attribute corresponding to plus the primary key attribute k of the relation that shows the entity typ
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