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What is one disadvantage of implementing a view using the approach of query modification?
What is one disadvantage of implementing a view using the approach of query modification?
- Difficulty in understanding the modified query
- Increased security vulnerabilities
- Incompatibility with certain types of databases
- Inefficiency for views defined via complex queries (correct)
When implementing a view using query modification, what happens to the view query?
When implementing a view using query modification, what happens to the view query?
- It is replaced with a new query
- It is converted into a stored procedure
- It is modified into a query on the underlying base tables (correct)
- It is executed directly without modification
Which of the following is an example of implementing a view using query modification?
Which of the following is an example of implementing a view using query modification?
- UPDATE Manager SET Salary = Salary + 10000
- DELETE FROM Employee WHERE Salary < 50000
- INSERT INTO Department (Dnumber, Dname) VALUES (5, 'Sales')
- SELECT Fname, Lname, Dname, Dnumber, Salary FROM EMPLOYEE, DEPARTMENT WHERE SSN=MgrSSN AND Salary > 100000 (correct)
What does the text describe as a way to implement a view using query modification?
What does the text describe as a way to implement a view using query modification?
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