This is one of the most frequently askedSQL Interview Questionsin the interview. 6) How can you define Primary Key? A Primary Key is basically a column that verifies each row in a table. It can also be a set or cluster of columns for identifying the number of rows in a table. The s...
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 update information in a database. Usually, a query response returns data from different tables within the data...
SQL Server Interview Questions and Answers Book is your comprehensive guide to excelling in interviews for SQL Server development and administration roles. Covering a wide range of topics from basic SQL queries to advanced database optimization techniques, this book ensures you’re well-prepared to ta...
7. Write a query to delete duplicate records from a table. Note: Write queries that suits the below situation. A table is having a unique key and having duplicates records, table is not having a unique and having duplicate records. 8. What is XACT_ABORT ON? 9. How to filter nested st...
Learn how to optimize the queries written in SQL to make them execute faster and more memory efficient. SQL SQL Interviews Preparations Material Resources- Feb 21, 2023. SQL is a must-known programming language for data people, and many modern jobs have SQL as a prerequisite. Here are materia...
Frequently Asked Questions (FAQ) - SQL FULL OUTER JOIN 1.What is a FULL OUTER JOIN in SQL? A FULL OUTER JOIN is a type of SQL join that returns all rows from both joined tables, including matched and unmatched rows. Matched rows from both tables are combined, while unmatched rows from...
SQL OFFSET is a powerful clause used to skip a specified number of rows in a query result. It is often combined with the LIMIT clause for data pagination. This tutorial explores how OFFSET works, its practical applications, and best practices for optimizing your SQL queries. If you would lik...
For the last 10 years I’ve been typing SQL queries as a Software Engineer, CEO, Marketer, and Data Analyst. I’ve been working as aLead Engineer in the Growth Team at Blinkist, helping it to grow to 16 million users. All these experiences have taught me one thing - you should know...
Loved this question asked by Kevin Feasel for this month of T-SQL Tuesday, so here I am to write this post before this day ends. Please find the invitation here.SourceFirst, I would like to talk about my entire amazing interview process as a whole. It was multiple layers of interviews ...
May lead to unexpected results if not used carefully, especially in complex queries with multiple joins. Frequently Asked Questions What's the difference between RIGHT JOIN and LEFT JOIN? RIGHT JOIN includes all records from the right table and matched records from the left table, whereas LEFT JO...