Lots of students are searching for SQL interview questions. Computer science has come a long way from its history, now everything is being computerized, programmed that can monitor the behavior of a human and learning to respond accordingly. It doesn’t only give you feedback but also restore each command in the form of data. Data is a language programming in a computer that keeps the information of a program. SQL is kind of a standard language that communicates with a database.
SQL stands for Structural Query Language. It is a language that can perform a task like updating, inserting, deleting, or retrieving data from a database. It’s a key function that handles all the data and managing of the systems regarding the language. If you are looking to have a career in database management then you should be aware of SQL interview questions.
Brief Infomation on SQL
SQL is a condemnatory tool which is used for a Data scientist, Artificial intelligence, and Data analysts. The language is being used in every firm because every firm runs on a database, to keep a progress check whether the firm is making any profit or not, they use this SQL technique to ensure the balance of the firm. Many professionals use SQL in different firms like Sales management, finance, HR, marketing, and computer science.
If you get hands-on SQL, the basis of all other languages you will be easily able to understand many different types of databases like Microsoft SQL Server, MySQL, MS Access, Oracle, Postgres, and much more. SQL works on the principle of RDBMS (Relational Database Management Systems).
Mainly the relational database system consists of a table like we use in the spreadsheet to collect the data in a proper format, for example like serial number, date, time, person name, address, and much more. This is the outline of a database and how the SQL system looks like.
SQL Interview Questions
SQL is a fun and easy to learn database and in today’s time, there is a huge demand for professionals who can operate the database. But one should always be prepared with all the possibilities when it comes to interviewing sessions for the students.
Here is the list of most frequently asked SQL interview questions:
Tell me about yourself and why you want this position?
This is the most basic expected question that every student is prepared for rather it is an interview no matter what field you are applying for, this question must be the first. The main reason is to get your vision for the job clearly to the interviewer. So, answering this can be your reason but make sure that the reason should make sense and wouldn’t be something useless.
What is SQL?
It is the most obvious and frequently asked question from the freshers as well as from an advance just for a sake of formality to check if the student knows it, the answer to this question is, SQL is Structural Query Language, that is used in software application and consists of a database tool which gives the command to the language. It is also used for retrieving and updating data from a database. It is one of the most basic question asked for sql interview questions.
What are ’Joins’ in SQL?
Now this will be the part when they will ask for more detailed information on SQL. So, to this simply just remember the four main types of joins in SQL those are FULL JOINS, RIGHT JOINS, LEFT JOINS, and INNER JOINS. The main function of JOINS is that it combines rows from two or more tables.
What is MySQL?
MySQL is an open-source relational database management system that is a part of the SQL, the main duty is of a web database. It employs a variety of database-driven web applications. MySQL is responsible to support major platforms like Linux, macOS, and windows. It is one of the most basic question asked for sql interview questions
What is DBMS?
Coming to the other step, comes the questioning of the database on which SQL works on. DBMS (Database Management System) a software system that analyzes the data, and collects the interactions with the application, users, and database. In short, it is a file manager that regulates the maintenance and use of a database. It is one of the most basic question asked for sql interview questions
What is RDBMS?
RDBMS (Relational Database Management System) is a system which collects the data in a table format same as we use in the spreadsheet, where we can see column, rows and all the entry made by the firm. The data is stored in the table which later can be used to manipulate the operation. It is one of the most basic question asked for sql interview questions
What is the difference between RDBMS and DBMS?
RDBMS is likely to store data in the format of a collective table, in which you can define the common field of a table with relation to each other. While on the other hand DBMS is more likely a file manager that doesn’t save data but stores the data within the database. All the database management systems such as MySQL, Oracle, Microsoft SQL, and much more are formed with the help of RDBMS.
Why do you want to work for our company in this SQL position?
This is a guaranteed question to come up. A lot of people want to know why you’ve chosen their company. And, a lot of people will join the company for the sake of Salary or some other reason. But always remember they want to know exactly why you want to work for their company in this SQL position. The answer should be genuine that clearly defined your goals. It is the one of the crucial sql interview questions
What personality will you bring to the team?
Again, a very basic yet easy answer which will define your personality. So, while answering this you must show that how do you work, your presence of mind, your anger management, and a lot of other stuff to look after. Always say the positive in you, be supportive with the team members, and show dedication towards your work. Always assure them that you will give your best for the company. Respond to people’s queries and questions in as quick a time as possible.
What’s your biggest weakness?
Once again, a very formal question that doesn’t always have to be given emotionally. Make a statement that clearly shows your weakness in a positive way like my weakness is that it’s too difficult to say no to people very easily. Which result in taking all others burden in my head. This ends up working all day just to catch up with all the expectations with the people’s task. This is a very smart move to make whenever this type of question arises.
What are your salary expectations in this SQL position?
Now, this is a very tricky question that will get your intentions for getting to start with their company. So, we need to be careful here. We don’t want to devalue ourselves, at the same time we also don’t want to be overconfident. Always have a positive thought in your mind and keep a good balance between your answers. So, you can say that I have done some research in the relation to the average salary for SQL position and then go with some decent figure which is not too high or too low for your profile.
Let’s Sum Up
These are some of the most crucial SQL interview questions. We have not covered the technical questions because if we do then the list can go endless. Although the technical questions also based on the requirements and usage of SQL in a specific organisations. If you can answer all these questions with enough confidence then you can easily crack your interview.