Consider a table named "Account," having the following fields.

Which of the following relational algebra expressions represents the query that will f‌ind names of customers having an account balance of over Rs. 5.000?

In which areas data-mining technology can be applied? 1. Marketing 2. Finance 3. Manufacturing 4. Healthcare

Which of the following correlated SQL queries will return Employeeld. EmployeeName, Salary and Department of all the employees whose salary is more than the average salary of employees in their respective departments?

Which of the following statements will be used to delete all the records from a table named, th? 1. DELETE from tb1; 2. DELETE ‘ from tb1; 3. DELETE tb1;

1. SELECT Iast_name, salary, hire_date FROM EMPLOYEES ORDER BY salary DESC 2. SELECT Iast_name, salary. hire_date FROM EMPLOYEES ORDER BY 2 DESC

What is the order of execution of operations during a pessimistic concurrency control technique?

Which of the following indexes in databases is usually dense?

Which of the following relations is also called a snapshot relation?

Database normalization is used to .

Choose the incorrect statements about an object identif‌ier (01D)? 1. The value of an OlD is visible to an external user. 2. It is used by a system to identify Objects uniquely. 3. An OID cannot be assigned to variables in programs.