<span>A _superkey___ is any key that uniquely identifies each row.</span>
<h2>All the given answers are right</h2>
Explanation:
- Lighting is one of the key factor which is essential to do cinematography
- It will help to cut off the shadows that is created using natural light
- It can depict the mood of the scene that is shoot
- We can adjust manually brightness and darkness according to the need, which is not possible in the natural light.
- It can boost the quality of the footage
- We can shoot anytime irrespective of the weather condition
- The light from the camera alone is not enough to shoot the best picture
Explanation:
Both Primary Key and Candidate Key are the attributes that are used to access tuples from a table. These (Primary key and Candidate key) are also can be used to create a relationship between two tables.
- A Candidate Key can be any column or a combination of columns that can qualify as a unique key in the database. Each Candidate Key can qualify as a Primary Key.
- A Primary Key is a column or a combination of columns that uniquely identify a record. The primary key is a minimal super key, so there is one and only one primary key in any relationship.
<em> The main difference between them is that a primary key is unique but there can be many candidate keys. </em>
I hope you find this information useful and interesting! Good luck!
