SQL from Zero to Hero Track - Online Learning with Certificate

SQL from Zero to Hero

Beginner

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This track covers both fundamental and advanced SQL techniques, enabling confident data management, query optimization, and data analysis. It explores…

188

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Learning hours

316

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What you will learn

Retrieving data with SQL SELECT statement

Using aggregate functions for data summary

Joining tables with INNER, LEFT, RIGHT, FULL JOIN

Sorting data using ORDER BY clause

Grouping data with GROUP BY and HAVING

Understanding relational database design

Filtering data with WHERE clause

Creating nested subqueries for complex queries

Applying SQL functions for data manipulation

Learning track content

Retrieving Individual Columns

Retrieving Multiple Columns

Retrieving All Columns

Retrieving Distinct Rows

Limiting Results

Challenge: Find the Population of the Countries

Challenge: Find All Countries

Challenge: Find All Countries With Their IDs

Challenge: Find Country Capitals

Challenge: Find the Regions in Which All Countries Are Located

Sorting Data

Challenge: Population Sort

Sorting by Multiple Columns

Challenge: Dual-Sort Query

Specifying Sort Direction

Challenge: Sort the Countries by Region and Capital

Challenge: Sort Capitals in Descending Order

Challenge: Sort Countries in Ascending Order

Challenge: Find Countries, Their IDs, and Their Populations

Challenge: Find All Continents and Sort Them in Ascending Order

Using the WHERE Clause

Challenge: North America Population Sort

The WHERE Clause Operators

Challenge: Population Threshold Query

Checking for a Range of Values

Checking for NO Value

Using the AND Operator

Challenge: Europe Region Sort

Using the OR operator

Challenge: America Regions Filter

Using the NOT Operator

Challenge: Non-Europe Capitals Sort

The AVG() Function

Challenge: Surface Area Selection

The COUNT() Function

Challenge: Continental Count

The MAX() Function

The MIN() Function

Challenge: Large Surface Area Average

The SUM() Function

GROUP BY Clause

Order of Statements

Challenge: Total Ride Time for Each Subway Line

Challenge: Average Student's Grade

Searching for the Top Math Students Challenge

HAVING Clause

Several Aggregate Functions in the Query

More Complex Filtering

Introduction to Subqueries

Subqueries in SELECT and WHERE Clauses

Challenge: Top Customers by Order Count

Challenge: Products Never Ordered

Challenge: Customers from Specific Cities with Orders

Challenge: Most Popular Product Category

Non-correlated vs Correlated Subqueries

Subqueries in FROM Clauses

Challenge: Recently Hired Employees

Challenge: Departments with Above-average Salaries

Challenge: Employees Without Recent Salary Increase

Challenge: Highest Paid Employee per Department

Subqueries for Aggregation and Filtering

Subqueries for Existence and Non-existence

Challenge: Most Active Members

Challenge: Books Borrowed in the Last Month

Challenge: Members with No Borrowings

Challenge: Most Popular Genre

Understanding INNER JOIN

Challenge: Find Customers with Orders

Exploring LEFT JOIN

Challenge: List All Customers and Their Orders

RIGHT and FULL OUTER JOIN in Action

Challenge: Orders Without Customers

Joining More Than Two Tables

Challenge: Employee Project Assignments

Self-Joins for Hierarchical Data

Challenge: Manager-Employee Relationships

Advanced Join Conditions

Challenge: Complex Assignment Matching

Challenge: Employees Without Projects

Dealing with NULLs in Joins

Join Performance and Optimization

Challenge: Optimize a Join Query

Real-World Join Scenarios

Challenge: Student Performance Dashboard

DBMS Overview

Difference between Relational and Non-relational Databases

Entity-Relationship Model

Entity-Relationship Model. Relationships

Structure. Primary Key and Foreign Key

Foreign Key Constraints. ON DELETE Options

Many-to-One and One-to-Many

One-to-One and Many-to-Many

Understanding CASE WHEN Syntax

Challenge: Categorize Sales Volume

Challenge: Regional Discount Flag

CASE WHEN in SELECT Clauses

Challenge: Price Tier Assignment

Challenge: Sales Performance Label

Nested and Multiple CASE WHEN Conditions

Challenge: Employee Bonus Eligibility

Challenge: Departmental Salary Bands

CASE WHEN with NULL and Missing Data

Challenge: Handle Missing Employee Data

Challenge: Custom Welcome Messages

CASE WHEN in WHERE Clauses

Challenge: Genre-Specific Movie Selection

Challenge: Blockbuster Filter

CASE WHEN in ORDER BY Clauses

Challenge: Custom Movie Ranking

Challenge: Release Year Priority

CASE WHEN with Aggregate Functions

Challenge: Customer Spending Analysis

Challenge: High-Value Transaction Count

CASE WHEN for Custom Reports

Challenge: Transaction Type Breakdown

Introduction to String Functions

Challenge: Standardize Customer Names

Challenge: Extract Email Domains

Advanced String Manipulation

Challenge: Mask Sensitive Information

Challenge: Clean Up City Names

Working with Dates and Times

Challenge: Calculate Order Age

Challenge: Find Late Deliveries

Advanced Date and Time Calculations

Challenge: Monthly Order Summary

Challenge: Predict Delivery Dates

Introduction to Numeric Functions

Challenge: Calculate Discounted Prices

Challenge: Find Low Stock Products

Advanced Numeric Operations

Challenge: Analyze Price Distribution

Challenge: Calculate Inventory Value

Introduction to Logical Functions

Challenge: Categorize Transactions

Challenge: Handle Missing Payment Methods

Advanced Logical Expressions

Challenge: Flag Suspicious Transactions

Challenge: Summarize Transaction Status

Understanding Null Functions

Challenge: Assign Default Bonuses

Challenge: Find Employees Without Managers

Advanced Null Handling

Challenge: Calculate Average Bonus

Challenge: Prevent Division by Zero

Introduction to JSON Functions

Challenge: Extract User Interests

Challenge: Find Users by City

Advanced JSON Manipulation

Challenge: Update User Age

What is ACID?

Atomicity

Challenge: Transaction Creation

Consistency

Isolation

Isolation. Repeatable Read and Serializable Levels

Challenge: Specifying Isolation Level for Transaction

What are Indexes

B-tree Indexing

Challenge: Creating B-tree Index

Hash Indexing

Data Caching

General Optimization Strategies

Challenge: Query Optimization

Triggers

NoSQL

Tables and Data Organization

Primary Keys and Uniqueness

Foreign Keys and Relationships

One-to-Many and Many-to-Many Relationships

Normalization: Eliminating Redundancy

Denormalization and Performance Trade-offs

Self-Referencing Tables and Hierarchies

Polymorphic Associations

Inheritance Mapping Strategies

Handling Many-to-Many Relationships with Attributes

Temporal Data and History Tables

Soft Deletes and Data Archiving

Vertical and Horizontal Partitioning

Database Sharding

Schema Versioning and Evolution

Flexible Data Models: EAV and JSON Columns

Multi-Tenancy Patterns

Read/Write Optimization Patterns

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