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:
Well most word processing softwares allow you to do many things to a document, if you use google documents or microsoft word i'm pretty sure you can do all of those things
Answer: a. intrapersonal and short-term goals
Explanation:
Intrapersonal goals are those that we set for ourselves in our minds to accomplish. The students that are finishing their homework after school most probably set that goal in their minds and so meeting it would mean meeting their intrapersonal goals.
Homework is not a long term project but rather a short one that is usually meant to be completed within days. Completing it is therefore a short term goal.
The students who finish their homework after school are therefore accomplishing both their intrapersonal and short-term goals.
Without system software, system can not run on the other hand without application software, system always runs
