Udemy – EssentialSQL: Subquery Magic – Master SQL Sub Queries. 2024-5

Description

EssentialSQL Course: Subquery Magic – Master SQL Sub Queries.. In this course, you will learn the basics of subqueries and how to use them effectively in your SQL statements in MySQL, PostgreSQL or MS SQL Server. You will learn different types of subqueries, including correlated and uncorrelated subqueries, and how to use them to solve complex problems. You will also learn about common errors when working with subqueries and how to optimize their performance in your queries. By the end of this course, you will have a comprehensive understanding of how to use subqueries in your SQL statements and be able to apply this knowledge to a wide variety of real-world scenarios.

What you will learn

• Write sub-queries to select data from multiple tables
• Create subqueries to return one or more values
• Using sub-queries in SELECT, FROM, WHERE and HAVING clauses
• Understanding and using correlated subqueries that depend on outer query values
• Use subqueries to solve problems such as finding maximum or minimum values ​​and records that do not have corresponding entries in other tables.
• Understand the difference between the IN, EXISTS, and ANY/ALL operators in subqueries
• How to use subqueries to create more complex queries and better understand the structure and relationships in a database

This course is suitable for people who

• Beginner SQL query writers who are curious about subqueries.
• If you have trouble writing sub-questions or are confused by interrelated sub-questions, this course is for you!
• Business analysts looking for more ways to write queries
• Recent college graduates looking to brush up on their SQL skills
• Job seekers looking to excel in their next interview!

EssentialSQL course details: Subquery Magic – Master SQL Sub Queries.

• Publisher:  Udemy
• Instructor:  Kris Wenzel , Essential Sql
• Training level: beginner to advanced
• Training duration: 2 hours and 9 minutes
• Number of courses: 22

Course topics on 2024/6

EssentialSQL course prerequisites: Subquery Magic – Master SQL Sub Queries.

• You should already be familiar with SELECT, GROUP BY, and ORDER BY clauses
• If you can write a simple selection statement, then you’re ready for this course!
• No special equipment needed, all exercises are done online.
• Optional: Install a MySQL, PostgreSQL, or SQL Server learning lab on your own computer.

Course images

Sample video of the course

download link

Download file – 541 MB

File(s) password: www.downloadly.ir

File size

541 MB