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Explain the term- Data Flows
Data Flows: A data flow connects output of an object or process to input of another process or object. It represents an in-between data value within a computation. Data flow states direction of flow of data from the source objects to destination object.
Where does view definition stored? A view definition is permanently stored as part of the database.
what is cascading? what is rollback cascading? please explain in detail
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
how to implement mid square hashing?
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
CREATE TABLE prodtrans ( pno number (4) ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5) FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
Database Recovery And Security Introduction In this part we will introduce two main issues relating to database management systems. A computer system suffers from dissi
What is data model? Explain object based and record based data models? Ans: A data model is an abstract model in which describes how data is represented and accessed. (i)
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