IT. What is a database join and why is it important? Coursework (Coursework Sample)
You are in a job interview. It may or may not be for a position that directly involves relational databases, but your interviewer wants to know if your Bachelor’s degree was academically rigorous. So, s/he asks the following question: “What is a database join and why is it important?” (150 words):
Discussion Post Format:
• Title: “Interview – Your Name”
• Opening: "Question: How would you respond to an interviewer asking you to summarize a database join?"
Interview – Your Name
What is a database join and why is it important?
In order to understand what a database join is, there is a need to understand what a database and database table means first. A database is a collection of accessible data. Also, it should easily manageable and updatable. A table is a collection of related data elements within a database (Rouse, n.d.). It consists of columns and rows. A join, therefore, is an operation which establishes a connection between two or more database tables (Techopedia.com, n.d.). There are different ways in which joins can be done. To perform a join, two tables and a joining condition must be present.
Database joins are very important since they are easier to read. When one wants to check certain data from a normalized database, we have to look a lot for it. Database joins if applied to such a database, they match the row that is in between tables (EssentialSQL.com, 2019). This enhances readability when one is looking for data in it. Apart from readability, joins link data from different tables.
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