Answer:
A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. A table cannot have more than one primary key.
Primary Key.
Candidate Key.
Alternate Key.
Super Key.
Composite Key.
Foreign Key.
Unique Key.
In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID.
Explanation:
Input
Output
(Sorry for not being detailed)
Explanation:
1. How many computers do you want to connect or how big the network should be?
This would tell us what kind of a network need to be built. It can be LAN/MAN/WAN
2. The location where network needs to be built?
We have to check the geographic condition too before creating a network
3. What is the budget?
Based on the budget only, we can decide the wires to be used if require we can negotiate the budget so that we can create effective network
4. Will I get an additional resources to work?
This is essential to estimate the time that is required to complete the task.
5. When the project needs to be completed?
This is crucial because a business might be planned thereafter.
Answer:
to remember the passwords you could either make a little rhyme to "help" remember it or you could be like everyone else and write it down on a piece of paper. you could also write the password over and over again to make it stick. a way to make a password different from an old one is to use completely different wording and completely different numbers.
Explanation:
