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;

Related MCQs

• 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?
• ANSI-standard SQL allows the use of special operators in conjunction with the WHERE clause. A special operator used to check whether an attribute value is null is
• State true or false. i) Select operator is not a unary operator. ii) Project operator chooses subset of attributes or columns of a relation.
• With SQL, how can you return the number of not null records in the “Persons” table?
• Which of the syntax is correct for insert statement? i) insert into <table_name> values <list of values> ii) insert into <table_name> (column list) values <list of values>
• In which scenario would you use the ROLLUP operator for expression or columns within a GROUP BY clause?
• With SQL, how do you select all the records from a table named “Persons” where the value of the column “FirstName” ends with an “a”?
•                  dump, writes out SQL DDL statements and SQL insert statements to a file, which can then be reexecuted to re- create the database.
• Which is the subset of SQL commands used to manipulate Oracle Database Structures, including tables?
• Which SQL function is used to count the number of rows in a SQL query?