Question at position 8 How do you correctly update the LastName of an employee in the Employees table where the EmployeeID is 5How do you correctly update the LastName of an employee in the Employees table where the EmployeeID is 5UPDATE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;MODIFY Employees SET LastName = 'Smith' WHERE EmployeeID = 5;UPDATE Employees WHERE EmployeeID = 5 SET LastName = 'Smith';CHANGE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;单项选择题
A
UPDATE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;
B
MODIFY Employees SET LastName = 'Smith' WHERE EmployeeID = 5;
C
UPDATE Employees WHERE EmployeeID = 5 SET LastName = 'Smith';
D
CHANGE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;

Question

Question at position 8 How do you correctly update the LastName of an employee in the Employees table where the EmployeeID is 5How do you correctly update the LastName of an employee in the Employees table where the EmployeeID is 5UPDATE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;MODIFY Employees SET LastName = 'Smith' WHERE EmployeeID = 5;UPDATE Employees WHERE EmployeeID = 5 SET LastName = 'Smith';CHANGE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;单项选择题

A

UPDATE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;

B

MODIFY Employees SET LastName = 'Smith' WHERE EmployeeID = 5;

C

UPDATE Employees WHERE EmployeeID = 5 SET LastName = 'Smith';

D

CHANGE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;

BlackTom AI · Accepted Answer

Question restatement: The task is to correctly update the LastName of an employee in the Employees table where the EmployeeID is 5.

Option 1: UPDATE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;
- This follows the correct SQL UPDATE syntax: specify the table, use SET to assign a new value to a column, and provide a WHERE clause to target the specific row(s).
- The value 'Smith' is properly quoted as a string, and the condition EmployeeID = 5 ensures only the intended record is updated. The trailing semicolon terminates the statement.

Option 2: MODIFY Employees SET LastName = 'Smith' WHERE EmployeeID = 5;
- The word MODIFY is not part of standard SQL for updating data. In SQL, data changes use UPDATE, not MODIFY.
- Because MODIFY is invalid syntax in this context, this statement would produce a syntax error in most relational databases.

Option 3: UPDATE Employees WHERE EmployeeID = 5 SET LastName = 'Smith';
- Here the order of clauses is incorrect. In SQL, SET must come immediately after the table name following UPDATE, not after the WHERE clause.
- This misordering makes the statement invalid syntax and would fail to execute.

Option 4: CHANGE Employees SET LastName = 'Smith' WHERE EmployeeID = 5;
- The keyword CHANGE is not used in standard SQL for updating data. Only UPDATE is the correct verb for modifying existing rows.
- As a result, this statement would not be recognized by a typical SQL parser.

Summary:
- The correct choice is the option that uses the proper UPDATE syntax, assigns the new value to LastName, and includes a WHERE clause to target EmployeeID = 5. The other options mix in nonstandard keywords or misplace clauses, leading to syntax or semantic errors.