CourseGenix

SQL

7 Units30 Lessons

Unit 1

Basics

Introduction to SQL Syntax and Data Types

Executing Simple SELECT Queries

Inserting, Updating, and Deleting Data Basics

Real-World Project: Building a Simple Inventory Database

Unit 2

Advanced Query Techniques

Using Aggregations and Grouping Functions

Advanced String and Date Manipulation Functions

Working with Common Table Expressions (CTEs)

Implementing Window Functions for Data Analysis

Real-World Project: Analyzing Sales Data with Advanced Queries

Unit 3

Joins and Subqueries

Understanding Inner and Outer Joins

Using Subqueries in SELECT Statements

Nesting Subqueries in WHERE and FROM Clauses

Exploring Self-Joins and Cross Joins

Real-World Project: Merging Data from Multiple Tables

Unit 4

Database Design and Normalization

Fundamentals of Database Design Principles

Applying First, Second, and Third Normal Forms

Real-World Project: Designing and Normalizing a Relational Database

Advanced Normalization Techniques like BCNF

Unit 5

Transactions and Concurrency Control

Basics of SQL Transactions and ACID Properties

Implementing Commit, Rollback, and Savepoints

Concurrency Control with Locking Mechanisms

Real-World Project: Managing Transactions in a Banking System

Unit 6

Indexing and Performance Optimization

Introduction to SQL Indexing and Its Types

Real-World Project: Optimizing a Large-Scale Database

Query Optimization Techniques and Execution Plans

Creating and Managing Indexes for Query Speed

Unit 7

Advanced Topics in SQL Integration

Integrating SQL with External Data Sources

Real-World Project: Building an Integrated SQL Application

Using Triggers and Stored Procedures for Automation

Views and Materialized Views in Complex Systems

Unit 2•Chapter 3

Working with Common Table Expressions (CTEs)

Summary

Provide summaries of transcripts that are 250 words or less, focus solely on the main topic, exclude sponsors and unrelated details, and avoid any introductory statements

Concept Check

0/5

What terminates recursion in a CTE?

When no rows are returned

With a LIMIT clause

After set iterations

Using UNION operator

How does a CTE improve query performance?

By always materializing data

Through recursive optimization

Increasing data duplication

Reducing table scans

Can CTEs be used in subqueries?

Only in the main query

Requires special syntax

Yes, they can be nested

Never in subqueries

What is the scope of a CTE?

Limited to the query

Stored permanently

Entire session

Database wide

How to handle cycles in recursive CTEs?

Ignore them automatically

Add a cycle detection

Use UNION for duplicates

Convert to loops

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