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white head (refer to Figure 5-6) The Defringe command in Photoshop makes it easy to clean up selections like this one To clean up selections that have leftover pixels of unwanted color often called a halo around the outside edge of a selection, first make sure the selection is on its own layer in Photoshop For example, if you used the Magic Eraser to remove the green background from the Eaglepsd file in the previous tip, you are left with the eagle itself on Layer 1 Then, choose Layer | Matting | Defringe and specify the amount of solid color pixels to remove from the edge of the layer If you re unsure, it s best to try 1 pixel first, because you can always perform the action again to remove additional pixels of color

select last_name from employees where department_id in (select department_id from departments where department_name='Executive');

What can be said about the two statements (Choose two correct answers) A The two statements should generate the same result B The two statements could generate different results C The first statement will always run successfully; the second statement will fail if there are two departments with DEPARTMENT_NAME Executive D Both statements will always run successfully, even if there are two departments with DEPARTMENT_NAME Executive 6 What are the distinguishing characteristics of a scalar subquery (Choose two correct answers) A A scalar subquery returns one row B A scalar subquery returns one column C A scalar subquery cannot be used in the SELECT list of the parent query D A scalar subquery cannot be used as a correlated subquery 7 Which comparison operator cannot be used with multiple-row subqueries (Choose the best answer) A ALL B ANY C IN D NOT IN E All of the above can be used 8 Consider this statement:

select last_name, (select count(*) from departments) from employees where salary = (select salary from employees);

Two versions of the Marquee tool the Single Row Marquee and Single Column Marquee are rarely used by most designers However, these two tools can be particularly useful to web designers who need to create quick single-pixel borders

What is wrong with it (Choose the best answer) A Nothing is wrong the statement should run without error B The statement will fail because the subquery in the SELECT list references a table that is not listed in the FROM clause

C The statement will fail if the conditional subquery returns more than one row D The statement will run but is extremely inefficient because of the need to run the second subquery once for every row in EMPLOYEES 9 Which of the following statements are equivalent (Choose two answers) A select employee_id from employees where salary < all (select salary from employees where department_id=10); PART II B select employee_id from employees where salary < (select min(salary) from employees where department_ id=10); C select employee_id from employees where salary not >= any (select salary from employees where department_id=10); D select employee_id from employees e join departments d on edepartment_id=ddepartment_id where esalary < (select min(salary) from employees) and ddepartment_ id=10; 10 Consider this statement, which is intended to prompt for an employee s name and then find all employees who have the same job as the first employee:

To create a quick single-pixel vertical border, first create a new layer in your destination file in Photoshop by clicking Layer | New | Layer or pressing SHIFT-CTRL-N (Windows) or SHIFT-CMD-N (Mac) Then, click and drag the Marquee tool to reveal the Single Column Marquee tool Click once within your image area, wherever you want the border to appear Next, make sure the desired color of this border is in the foreground color swatch of the toolbox, and press ALT-BACKSPACE (Windows) or OPTION-DELETE (Mac) to fill the border with the foreground color To create a single-pixel horizontal border, repeat the preceding steps using the Single Row Marquee tool

select last_name,employee_id from employees where job_id = (select job_id from employees where last_name = '&Name');

What would happen if a value were given for &Name that did not match with any row in EMPLOYEES (Choose the best answer) A The statement would fail with an error B The statement would return every row in the table C The statement would return no rows D The statement would return all rows where JOB_ID is NULL 11 Which of these set operators will not sort the rows (Choose the best answer) A INTERSECT B MINUS C UNION D UNION ALL 12 Which of these operators will remove duplicate rows from the final result (Choose all that apply) A INTERSECT B MINUS C UNION D UNION ALL