How to Answer: In Oracle, do you understand what a join is and what the various types of joins are?
Advice and answer examples written specifically for a Meltwater Group job interview.
2. In Oracle, do you understand what a join is and what the various types of joins are?
How to Answer
As a software developer that utilizes Oracle databases, your interview will expect that you have a strong working knowledge of concepts within oracle. One such concept is joins. Let your interviewer know that you understand that join is used to combine columns from multiple tables based on values within the columns to allow you to query data from those multiple tables. Then, explain what you know about left, right, inner, full outer and cross joins.
Written by Ryan Brunner on February 20th, 2020
1st Answer Example
"Having worked with Oracle for the past five years, I have a strong experience in using join to query data from multiple tables within the system. I have written queries utilizing left and right join, but the majority of my work in my current role utilizes inner join. This query looks to select data that is common in multiple tables and has been extremely useful in healthcare related software."
Written by Ryan Brunner on February 20th, 2020
2nd Answer Example
"I do fully understand the join process in Oracle and have experience working with all of the types of joins that are possible in querying in the system. I've recently become very familiar with the cartesian cross join that basically joins all rows from multiple tables. In recently helping develop a program for the auto sales industry, I created a grid in Oracle that populated all of the common specs of makes and models of vehicles and the cross join made this much easier."