Answer:
CASE
Explanation:
Case Structure is a mechanism that allows different executions when there are several distinct possible values for a single variable, and each value requires a different subsequent action depending on the value of the label.
Case structure is also a conditional control structure that appears in most modern programming languages and allows a selection to be made between several sets of program statements.
For the view of Exercise 4.18, explain why the database system would not allow a tuple to be inserted into the database through this view.
For reference
For the database of Figure 4.12, write a query to find the ID of each employee with no manager. Note that an employee may simply have no manager listed or may have a null manager. Write your query using an outer join and then write it again using no outer join at all.
OUTER JOIN
select e.ID from employee e left outer join manages m on e.ID = m.ID
where m.manager_id is null;
NO OUTER
select e.ID from employee e where e.ID not in (select m.ID from manages m) or e.ID in (select m.ID from manages m where m.manager_id is null);
Yes actually it is it’s a machine to use for opening bottles such as cans n other
Answer:
Gestures
Explanation:
Gestures is the name of the Mac feature that makes these finger motions available to perform specific functions on a Mac OS system: