so employers test candidates on various concepts ranging from basic to advanced-level queries. This blog covers common SQL interview questions and their answers to help you succeed in your next interview.
In this article, you will learn many simple and complex SQL queries asked in IT interviews. Let's take two tables which help in solving various queries. The name of the first table isStudent,and the name of the second table isSubject. The Student table consists ofStudent_ID, Stu_Name, ...
Practical SQL Query Interview Questions (SQL Server Queries examples with answers) In this part, we will see SQL practice questions which contain both complex SQL queries interview questions and basic SQL Interview Questions. Let’s see important SQL queries for interview 76. How to get unique rec...
In conclusion, we covered the top 70+ SQL interview questions and answers in this article that help you prepare and crack SQL jobs. We focused on covering essential concepts of SQL like basics of SQL queries, joins, subqueries, indexing, and performance optimization. Whether you are a beginner...
TCL –Transaction Control Language– deals with the transaction within the database. 7. What is a Query? A query, in SQL, is a command used to request data or update information from a database table or combination of tables. Users can write and execute queries to retrieve, delete or upd...
Tricky SQL Queries Interview Questions We’ll provide you with a set of tricky SQL queries along with some demo tables. Please note that the complexity of these queries may vary, and they are designed to test various aspects of SQL knowledge. Before running these queries, make sure to create...
In SQL, a view is like a virtual table created by a query. It’s not a real table with data, but it acts like one when you query the database. Views have a few handy tricks up their sleeves: Simplified Queries: You can use views to make complex queries easier to read and use. ...
If you are working on SQL programming or learning SQL or how to write queries and looking to test your knowledge or prepare for any SQL interview, the below article can help you. The objective of today’s article is to help you prepare for an Interview or test the knowledge you gain in...
Q24: How can you find the missing indexes that are needed to potentially improve the performance of your queries? TheMissing Index Detailsoption in the query execution plan, if available. Thesys.dm_db_missing_index_detailsdynamic management view, that returns detailed information about missing inde...
A. UNION:It combines two or more results from multiple SELECT queries into a single result set. It has a default feature to remove the duplicate rows from the tables. The following syntax illustrates the Union operator: B. UNION ALL:This operator is similar to the Union operator, but it ...