The term ____________________ means to subtract 1 from the current value of a variable.

Fill in the blank(s) with the appropriate word(s).


decrement

Computer Science & Information Technology

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Formulate the following queries in relational algebra, tuple relational calculus, and domain relational calculus.

The following tables form part of a database held in a Relational Database Management System: Employee (empID, fName, lName, address, DOB, sex, position, deptNo) Department (deptNo, deptName, mgrEmpID) Project (projNo, projName, deptNo) WorksOn (empID, projNo, hoursWorked) where Employee contains employee details and empID is the key. Department contains department details and deptNo is the key. mgrEmpID identifies the employee who is the manager of the department. There is only one manager for each department. Project contains details of the projects in each department and the key is projNo (no two departments can run the same project). and WorksOn contains details of the hours worked by employees on each project, and empID/projNo form the key. (1) List all employees. (2) List all the details of employees who are female. (3) List the names and addresses of all employees who are Managers. (4) Produce a list of the names and addresses of all employees who work for the ‘IT’ department. (5) Produce a list of the names of all employees who work on the ‘SCCS’ project.

Computer Science & Information Technology

To add a table's field list to the upper pane of Query Design View, click the ____________________ Table button on the Design tab.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology

?You see a deceptive pop-up that says your computer is infected and that you must visit a compromised web site where you pay them to clean your computer. You have just become a victim of ransomware.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

Which attribute enhances usability in modern browsers??

A. ?id B. ?src C. ?placeholder D. ?value

Computer Science & Information Technology