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:
$4 x number of visits (V)> price of membership (M)
V > M/4
Answer:
Testing
Explanation:
From the question, we understand that Carlos just finished the coding of the app.
In software development life cycle, the coding phase is where Carlos is expected to make use of his choice of programming language to design the app;
This stage is an integral part of the implementation process and according to the question, the coding has been completed;
The next phase or stage after the implementation phase is testing.
Hence, Carlos is getting ready to test the app.
Wrong, You should get renters insurance to insure your items that you do have or will recieve in the future are safe
