Indexesare special lookup tables used to speed up data retrieval. They significantly improve query performance by allowing the database to find data without scanning every row in a table. However, they may slow down INSERT or UPDATE operations due to the maintenance of index data. Example: CREAT...
In my previous articles I have explained theSQL interview questions ,BI Interview questionswhich will give the best idea about the question that may ask in interview. In this article i will try to explain most important PL/SQL Interview Questions that may ask in interview.PL/SQL is the Proced...
Correlated Query is nothing but the subquery whose output is depending on the inner query used in that query.Correlated query is the query which is executed after the outer query is executed.The outer query is always dependent on inner query.The approach of the correlated subquery is bit differ...
16. What are the new features introduced in SQL Server 2000 (or the latest release of SQL Server at the time of your interview)? What changed between the previous version of SQL Server and the current version? This question is generally asked to see how current is your knowledge. Generally...
Frequently Asked SQL Interview Questions 1. What is a Database? Adatabase refers to a structured data collection that can be stored, managed, and retrieved from a remote or local computer system. Databases can become pretty complex and are built with a fixed design and modeling approach. ...
In this article Context Reasoning Illustration Summary See Also Context There was an interesting question once asked during an interview for SQL skills which looks like the below: "Which is the simplest type of join and which is the most generic type of join statement?" ...
7. What kind of information that SQL Server keeps in memory? 8. Customer asked to break the mirroring and failover to mirror database. What are the steps to be taken other than a manual failover? 9. Can you give some examples for One to One, One to Many and Many to Many relationsh...
Information from a previous student "asked in an interview". What is a linked server? Allows remote access and the ability to write queries directly on a database on another machine.Day03 What is a cursor? (A loop that allows row by row processing in a result set.In order to work ...
Read more about the solution at SQL self join interview question on my programming interviews blog's post (https://www.programminginterviews.info/2013/03/sql-self-join-or-sub-query-interview-question-employee-manager-salary.html).注释vinayak sharma2014年4月8日 SELECT e.first_na...
Resource:Top SQL Server Interview Questions With Answers by Software Testing Help Another specific SQL interview questions material. In this guide, you will learn about questions asked for the SQL server with detailed answers. The material might be relevant for data engineer and related job roles. ...