IT-DBSYS 1 Week 7 : Advanced Queries & SQL Functions

Описание: Here's a YouTube description for "IT-DBSYS 1 Week 7: Advanced Queries & SQL Functions on Database Management System 1":

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*IT-DBSYS 1 Week 7: Advanced Queries & SQL Functions on Database Management System 1*

Dive into Week 7 of IT-DBSYS 1 as we transition from foundational SQL to advanced data manipulation and analysis\! This session focuses on mastering complex queries and leveraging powerful SQL built-in functions to solve real-world reporting and data transformation challenges.

*In this video, you'll learn to:*

*Combine Result Sets with Set Operators:* Explore `UNION`, `UNION ALL`, and learn how to simulate `INTERSECT` and `EXCEPT` in MariaDB/MySQL to efficiently combine data from multiple queries.
*Write Complex Subqueries:* Understand and apply subqueries within `SELECT`, `FROM` (derived tables), and `WHERE` clauses to filter, transform, and aggregate data with precision.
*Utilize SQL Built-in Functions:* Discover how to use essential string, date, and numeric functions to clean, format, and calculate data:
*String Functions:* `UPPER()`, `CONCAT()`, `SUBSTRING()`, `TRIM()`
*Date Functions:* `NOW()`, `CURDATE()`, `DATEDIFF()`, `DATE_ADD()`
*Numeric Functions:* `ROUND()`, `ABS()`, `CEIL()`, `FLOOR()`
*Solve Real-World Data Challenges:* Apply these advanced tools to practical exercises, simulating the role of a data analyst generating insights and transforming raw data into meaningful reports using a `student_enrollment` database.

This week builds on your prior SQL knowledge, especially your existing `Student`, `Course`, and `Enrollment` tables. Get ready to enhance your SQL skills and tackle more intricate database tasks\!

*Key Concepts Covered:*
\#SQL \#AdvancedQueries \#SQLFunctions \#DatabaseManagement \#SetOperators \#Subqueries \#StringFunctions \#DateFunctions \#NumericFunctions \#DataAnalysis \#MariaDB \#MySQL \#ITDBSYS