Following are some very important Complex SQL Queries Examples with answers. I have tried to explain each and every query in detail so that everyone will get idea of how it is executed step-by-step. In SQL and PL SQL interviews we require to know the key and important complex sql queries...
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...
a) Explicit Cursors:For queries that return more than one row, an explicit cursor is declared and named by a programmer. In order to use explicit cursor in PL/SQL, 4 steps are followed Declare the cursor Syntax:CURSOR <cursor_name> is SELECT statement; Here, <cursor_name> is the name ...
Describe the topic with code snippets Hi guys, in this article we will look into some SQL Server queries which you should prepare before going to your interview. Basically while going to C#, ASP .Net interview SQL Server interview is common. So be prepare for SQL server queries....
In some SQL practice examples of this article, we will use the Adventureworks2019 sample database, and also we will use the Enlarging the AdventureWorks script. How to write efficient SQL Queries? This question commonly is asked in SQL-related jobs technical interviews and the main idea behind...
Could either database fragmentation or bad queries be causing the counters to reach such heights?A When Pages/sec is greater than 0 or Page Reads/sec is greater than 5, Windows is going to disk to resolve memory references (via a hard page fault), which comes at the price of disk I/...
Got this book for more practical examples to apply SQL in the real world, and this book is amazing! It guides you through very easy examples and gradually challenges you to solve more challenging problems.I will highly recommend this book to people that are starting in SQL or looking to app...
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...
Correlated Queries are one of the types of subqueries where it output of the query is dependent on the outer query. In this case, the outer query executes first and on basis of the correlated query executes. Q10: What are ranking functions in SQL Server Explain. ...
SQL server has six types of constraints, and we will explore all these constraints here with suitable examples. The constraints that we are going to explore are listed below: Primary Key Constraint Foreign Key Constraint Not Null Constraint Unique constraint Default Constraint Check Constraint First,...