Database Management System Question
Database Management System Question With Answer & Solution
Que. - Which of the following consists of a row of column headings, together with zero or more rows of data values?
Que. - In which of the following cases will the RDBMS specify a default value for the column if there are no values for it?
Que. - Which of the following database object does not physically exist?
Que. - Which of the following is a structure that provides faster access to the rows of a table based on the values of one or more columns?
Que. - Which of the following index is made up of more than one column?
Que. - Which of the following index can occur only one per table?
Que. - Which question corresponds best to the following query? SELECT CID, CDUR - 1,' = PRICE' FROM COURSES ORDER BY 2
Que. - What is the default order of Order by clause?
Que. - View the Exhibit and examine the structure of the EMPLOYEES and DEPARTMENTS tables.
Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers?
SELECT department_id FROM departments ____ SELECT department_id FROM employees WHERE manager_id IS NULL;
Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers?
SELECT department_id FROM departments ____ SELECT department_id FROM employees WHERE manager_id IS NULL;
Que. - View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
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