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!
Execute this assignment from Scratch in the following way
Explanation:
1.For each thread, first Scratch sets the 'active thread' to that thread. Then, it executes each block one by one in the stack for the active thread. It will execute the entire stack all in one go if it can.
2.The Hide block is a Looks block and a Stack block. If the block's sprite is shown, it will hide the sprite — if the sprite is already hidden, nothing happens. This block is one of the simplest and most commonly used Looks blocks.
3.Scratch is used in many different settings: schools, museums, libraries, community centers, and homes.
4.Mitch Resnik, the creator of the super-simple Scratch programming language and head of the Lifelong Kindergarten group at the MIT Media Lab, gave a TEDx talk about the value of coding and computer literacy in early education.
5.
Answer:
What will I have to sacrifice if I buy this laptop
Explanation:
Emma by asking herself this question will scale her preference as well as compare her opportunity cost in determining if purchasing the laptop is importance to her at the moment and of what other thing will she be willing to sacrifice just so she could buy herself a laptop, and how the purchase would still be within her projected budget.
Answer:
Kindly check explanation
Explanation:
Laws refer to legal rules and regulatory framework which is used as a guiding principle to define the actions and behavior which may lead to incurring penalties if boundaries are trespassed.
The word 'Cyber' is popularly used to describe activities, actions and interactions involving the internet. With the burst and continous pace of digital transformation, the internet also called Cyberspace is in a world of its own. Hence, the creation of rules to govern internet interactions.
Cyber laws may thus be explained as codified laws which are designed and implemented to govern all forms of possible online interaction or transactions in other enhance cyber security to protect the interest of persons and data from various forms of internet threats. Cyber laws include ; Data protection laws, Computer crime laws, telecommunication laws and so on.
The number of pixels displayed on the screen is known as screen resolution.
The coding applied to a text document to change it into an HTML is HTTP
Scripting language for webpages is Javascript.
Hypertext markup language is HTML
The address, or the item that specifies where on the Internet a site can be found is the URL.
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