Few Sql Scenario Based Interview Questions On Joins are asked during interviews, but in this article, we’ll discuss some of the best SQL scenarios for practice that tested candidates frequently asked by interviewers.
Every company wants to onboard employees who can help them expand products and data. Top tech companies like Amazon, Uber, Facebook, and Google focus on SQL, especially when screening fresh candidates.
SQL stands for Structured Query Language and is a standard language based on the English language. Since RDBMS is one of the most widely used databases, most job roles today require SQL skills. Cracking SQL interviews can be quite difficult if you are not prepared for it.
Today we will discuss some of the most important scenario-based SQL interview questions to ace interviews in top tech companies. Without further ado, let’s begin.
Important SQL Interview Questions
These SQL interview questions could help you to practise before an interview:
What is the name of the new string function that can be used to extract data from a table and create a CSV file?
CONCAT WS is a new SQL Server function that concatenates a configurable number of arguments into a single string, with the first argument serving as a separator. A separator is required, as well as at least two arguments. It’s beneficial for producing CSV files with content separated by commas or pipes.
How does adaptive query processing work in SQL Server?
A new generation of query processing innovations in SQL Server and Azure SQL Database adapts optimisation strategies to the runtime conditions of your application workload.
Does SQL Server 2021 support Python?
Yes, it does.
What are the three distinguishing characteristics of adaptive query processing?
SQL Server and Azure SQL Database provide three adaptive query processing features that could help you improve query performance:
- Give feedback in batch mode memory
- Adaptive batch mode join
- Interleaved execution: a method of executing many tasks at the same time
What exactly is log shipping?
The process of backing up and restoring database and transaction log files from a production SQL server to a backup SQL server is known as log shipping.
Enterprise Editions are the only ones that can send logs. Therefore, when log shipping is employed, the transaction log file from one server is updated automatically into the backup database on the other server.
What is the updated TRIM function used for?
The TRIM function removes the char(32) space character or other specific characters from the end or beginning of a string.
These are only a few of the most crucial scenario-based SQL questions you should prepare for interviews. As always, focus on the theme, not rote learning facts and numbers.
Preparation Tips for SQL Scenarios for Practice
Knowing questions and their answers alone may not be enough to make it past an interview, especially in the top tech companies. Keeping that in mind, here are some tips to prepare for SQL interview questions:
Understanding aggregate functions
SQL is an amazing tool for aggregations. SQL includes a number of functions, including AVG(), COUNT(), SUM(), MIN(), MAX(), and several others. As a result, an interviewer anticipates that the candidate will have a rudimentary understanding of aggregate functions.
When you have a firm grasp of SQL’s aggregate functions, you can catch recruiters’ interest and convince them to continue with your candidacy.
Problems using analytics-related functions
SQL provides analytics functions (windows functions) as a feature. This function aids in the identification of the table’s most significant value. It removes the stress from your tasks. Since it is one of the most significant functions in SQL, a candidate must have a good grasp of it.
Combining outcomes from tables
A candidate who is giving a SQL interview should be able to combine results from different tables by employing joins and set procedures.
When the interviewer wants you to demonstrate your knowledge of joins, you must excel in it. That alone will establish your practical expertise and suitability for the position.
Use a methodical, step-by-step approach.
In an interview, there are bound to be moments when you are confronted with issues that appear to be rather challenging at first. However, it’s best to take a systematic approach to tackle these issues.
Before solving them logically, you must break down a more significant problem into subproblems. Your efficiency is directly related to how logical your approach is.
Interview Prep
Interviews are stressful for most people, and nervousness often takes the better of us. Preparation is the only solution to prevent such situations.
The better prepared you are, the more equipped you will be to handle pressure. While there are several specific ways to prepare for interviews, practising and exploring all possible scenarios is critical.
Final Thoughts
There are several SQL Scenario Based Interview Questions On Joins for practice so developers can get a good hold of it. This helps the developer improve their knowledge of handling better queries and procedures. These scenarios help you learn SQL along the way so that it can be applied in different practices.
For more articles on preparing for interviews, head to our blog.
