SQL & Databases

SQL & Databases Courses

Master SQL and databases: from basic queries to advanced techniques, schema design, and Python integration — become proficient in working with data!

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Gained skills:

A/B Test Analysis in SQLAdvanced Join TechniquesAdvanced SQL ReportingAggregations and GroupingAttribution ModelingBusiness Logic with CASE WHENCRUD OperationsCampaign Performance QueryingCohort Analysis with SQLData Analysis with JoinsData Analysis with SQLData Filtering and SortingData HandlingData Indexing and Selection in pandasData ManipulationData ModelingData Modeling for BIData Reconciliation in SQLDatabase ManagementDatabase ModelingDatabase NormalizationEvent-based Data ModelingExecution Plan AnalysisFeature Adoption AnalysisFunnel Analysis in SQLIntermediate SQLLedger-Style SQL JoinsMulti-table QueriesPartitioning and Framing in SQLPython ProgrammingQuery Planning and OptimizationRanking and Analytic FunctionsResult Set ConstructionRetention and Churn QueriesSQL AggregationsSQL BasicsSQL Date and Time FunctionsSQL FunctionsSQL JSON FunctionsSQL JoinsSQL Logical FunctionsSQL Null FunctionsSQL Numeric FunctionsSQL Parsing and ValidationSQL Period-over-Period AnalysisSQL Query LifecycleSQL Query OptimizationSQL Reporting PatternsSQL String FunctionsSQL Time-Series AggregationSQL Transaction Logic & ACIDSQL Window FunctionsSQL in Python ProjectsSessionized Data AnalysisSubqueriesTable JoinsWindow FunctionsWindow Functions for Product Metrics

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Courses

Browse SQL & Databases courses and projects

Level

Type of lesson

Technologies

Introduction to SQL

4 hours

41 chapters

Beginner

57 STUDYING NOW

Acquired skills: SQL Basics, Data Manipulation

Intermediate SQL

3 hours

25 chapters

Intermediate

76 STUDYING NOW

Acquired skills: Intermediate SQL, Data Handling, Data Manipulation, Data Modeling

SQL Optimization and Query Features

4 hours

22 chapters

Advanced

16 STUDYING NOW

Acquired skills: SQL Query Optimization, Data Indexing and Selection in pandas, Database Management, Database Normalization, SQL Basics, CRUD Operations, Database Modeling

Relational Database and Normalization

1 hour

12 chapters

Beginner

9 STUDYING NOW

Acquired skills: SQL Query Optimization, Database Normalization

Working with Databases in Python

3 hours

21 chapters

Intermediate

5 STUDYING NOW

Acquired skills: Python Programming, CRUD Operations, SQL in Python Projects, Database Normalization, SQL Basics

SQL Joins in Depth

2 hours

21 chapters

Beginner

12 STUDYING NOW

Acquired skills: SQL Joins, Multi-table Queries, Data Analysis with Joins, Advanced Join Techniques

SQL for Data Analysis

2 hours

18 chapters

Beginner

5 STUDYING NOW

Acquired skills: SQL Basics, Data Filtering and Sorting, Aggregations and Grouping, Table Joins, Subqueries, SQL Functions, Data Analysis with SQL

Functions in SQL

3 hours

35 chapters

Beginner

9 STUDYING NOW

Acquired skills: SQL String Functions, SQL Date and Time Functions, SQL Numeric Functions, SQL Logical Functions, SQL Null Functions, SQL JSON Functions

Window Functions in SQL

2 hours

22 chapters

Beginner

4 STUDYING NOW

Acquired skills: SQL Window Functions, Ranking and Analytic Functions, Partitioning and Framing in SQL, Advanced SQL Reporting

SQL Query Execution

1 hour

12 chapters

Beginner

Acquired skills: SQL Query Lifecycle, SQL Parsing and Validation, Query Planning and Optimization, Execution Plan Analysis, Result Set Construction

SQL for Business Intelligence Analysts

2 hours

18 chapters

Intermediate

Acquired skills: SQL Aggregations, Business Logic with CASE WHEN, Window Functions, Data Modeling for BI, SQL Reporting Patterns

SQL for Finance and Accounting

4 hours

22 chapters

Advanced

1 STUDYING NOW

Acquired skills: SQL Time-Series Aggregation, SQL Period-over-Period Analysis, Ledger-Style SQL Joins, Data Reconciliation in SQL, SQL Transaction Logic & ACID

1 2

Choose a career pathComprehensive programs to master a career pathway

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SQL from Zero to Hero

Beginner

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Learning tracks

Take control of your career development and commence your path into mastering the latest technologies

Real-world projects

Real-world projects elevate your portfolio, showcasing practical skills to impress potential employers

Why Codefinity stands out

Video content

Downloadable materials

Esteemed certificates

Interactive learning environment

Error correction

AI assistant

Access to all content with one subscription

Codefinity

Video-based learning platforms

Codefinity

Video-based learning platforms

Video content

Downloadable materials

Esteemed certificates

Interactive learning environment

Error correction

AI assistant

Access to all content with one subscription

Career opportunitiesLearn about the most popular professions, average salaries, and companies actively seeking specialists in this field.

Database Administrator

Data Engineer

Data Architect

$81k

$110k

$140k

Min

Average

Max

Annual salary

(Average in the US)

Hiring companies

*Source: Glassdoor

Chosen by students of top schools

Including 30 out of top-30 U.S. colleges

SQL & Databases Courses: Key Info and Questions

What is SQL and why is it important?

SQL (Structured Query Language) is the standard language for interacting with relational databases. It allows you to retrieve, filter, update, and manage data efficiently — making it a core skill for data analysts, developers, and anyone working with structured data.

What will I learn in SQL & Databases courses?

You’ll learn how to write SQL queries, use SELECT, WHERE, JOIN, GROUP BY, ORDER BY, and perform operations like filtering, aggregating, and combining data. Advanced topics include subqueries, window functions, indexing, and database design.

Do I need coding experience to start learning SQL?

Not at all. SQL has a relatively simple, readable syntax and is perfect for beginners. Even without programming experience, you can quickly start querying real databases and exploring structured data.

Are the courses practical and hands-on?

Yes — courses include interactive SQL editors, real-world datasets (like sales, users, or orders), and exercises that simulate real analysis tasks. You’ll write queries and get instant feedback, making learning active and engaging.

What databases will I work with?

Most courses use SQLite or PostgreSQL for simplicity, but you’ll also get exposed to MySQL and possibly cloud databases. The SQL you learn is transferable across all major relational database systems.

What careers can SQL help me with?

SQL is a must-have for roles like data analyst, business analyst, backend developer, database administrator, and product analyst. It’s also widely used in marketing, operations, finance, and research roles that involve data-driven decisions.

How is SQL used in real life?

SQL is used to power dashboards, generate reports, connect APIs to databases, track user behavior, and run backend services. It’s the foundation behind most apps, websites, and data tools used in modern businesses.

Will I get a certificate?

Yes — completing any SQL & Databases course earns you a certificate that proves your skills in querying and managing data, which can enhance your job applications or technical portfolio.

Can I combine SQL with other tools like Python or Excel?

Definitely. Many data analysts use SQL to get the data, and then tools like Python, Excel, or BI platforms (like Tableau) to further analyze and visualize it. Our advanced courses may show you how to connect them together.