SQL – Structured Query Language

SQL – Structured Query Language:

This is a language designed to manage data in database management system. And it designed to store, retrieve, manipulate and manage the data of Relational Database Management System (RDBMS).

What are the things freshers need to know on the SQL job interview?

Skills required for SQL jobs for fresher:

  • Create access and update data in a database.
  • Learn essential query keywords and functionality.
  • Study Aggregate functions.
  • Try to create and manipulate databases with multiple related tables.

Responsibilities and duties of the candidate as the SQL Developer:

  1. One should understand the project cycle and process.
  2. Good logical and analytical skills.
  3. Certification in SQL is an added advantage for you in any sector.

How to learn SQL basics to get a job in IT as a fresher?

6 things needed to become a sql developer:

  • Initially try to work with editor.
  • Install MAMP or XAMPP
  • Create a SQL database.
  • Learn Basic SQL syntax and queries.
  • Study about database design with multiple tables.
  • Further Foreign keys and Join operators add a special point in your SQL jobs for fresher

Top Tools the SQL developers used to develop:

Some of the famous SQL IDE used by the developers is listed below. Get some knowledge about at least one of them to get some extra points on your SQL jobs for fresher interview session.

  1. SQL Developer.
  2. dbWatch
  3. TiCodex
  4. Jet Profiler for MySQL.
  5. Adminer
  6. DBComparer
  7. EMS SQL Manager
  8. SQuirrel SQL
  9. SQLite Database Browser
  10. DBeaver

How to become a SQL Developer?

Learn by reading the important queries and try to practice the queries you have learned. Ask doubts. Be practical and open minded on what you are studying.

Important things to learn for SQL job interview:

  • SQL injections: It is a code injection technique which can destroy your database.
  • Difference between PLSQL, TSQL and MYSQL.
  • Triggers: a storage procedure in the database which paves a new way to check the data integrity.
  • Group By: The “group by” statement arrange the same similar data in group with SELECT statement.
  • Primary and Foreign Key: Foreign key used to link two different tables and at the same time primary key used to identify a record in the table.
  • Joins: There are different types of joins like inner join, outer join, left join and right join. Joins used to combine columns from the table.
  • Views – This would stored in the database as SELECT statement. It is a type of a virtual table where the part of the original data values is stored from which you can refer it.
  • Data Types: Some of the data types used in SQL are as follows Boolean, Character and VarChar.

A typical SQL interview example:

If you are being interviewed at the data warehouse jobs with underlying database being MS SQL server. Then you can expect similar SQL jobs for fresher interview experience mentioned below.

Telephonic interview:

  • In the telephonic interview you can expect surface level question about SQL and related concepts.
  • When you cleared it they will call you for the next level of interview.

In person interview:

Make sure you go through the below mentioned topics. You can expect questions from these topics for SQL interview.

  • Transactions
  • Stored Procedures
  • Primary Keys
  • Joins
  • Views
  • Functions
  • Locking
  • Clustered Index vs. Non-clustered Index
  • Normalization
  • Cursors
  • Aggregate functions

Coding interview:

The coding session goes like asking you to write some code on the given scenario. Read below to know some of the questions asked at the SQL jobs for fresher Interview.

  • Restaurant total bill production. More than 500 data.
  • Find the max value in the table using Order By Clause
  • How to delete duplicate record?
  • Pivoting
  • SQL and NO-SQL real time examples.
  • BULK insert command