It is called social networking.
4 Types Of Dimmers :
1. Incandescent/Halogen
2. Magnetic Low Voltage (MLV)
3. Fluorescent
4. Light Emitting Diode (LED)
These are the different types of switches :
1. A single-pole switch controls lights from a single location. ...
2. A 3-way switch provides two separate control locations and is best used with recessed lights. ...
3. A 4-way switch provides for three or more dimming locations.
4. Switches are wired to the "hot" conductor in a wall box.
<em>I hope that my answer helps!</em>
I wouldn't think so unless they have access to your phone or account. But I don't believe this is school related.
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);
