Learn SQL with 100 Coding Exercises

Master SQL: Enhance Your Skills with 100 Hands-On Coding Queries in 100 Days – Take the Challenge!
⏱️ Length: 30 total minutes
⭐ 4.34/5 rating
👥 21,640 students
🔄 June 2024 update

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Course Overview
- Embark on an intensive, focused journey to master SQL through consistent, daily practice, building your skills over a structured regimen.
- Experience a unique “100 Days, 100 Queries” challenge, providing a highly practical and application-driven approach to SQL learning.
- This course prioritizes hands-on coding exercises, making it ideal for learners who thrive by doing rather than extensive theoretical lectures.
- Discover the efficiency of micro-learning segments, where each day introduces a new coding problem to solve, perfect for integrating into a busy schedule.
- Gain foundational to intermediate SQL proficiency by tackling a wide array of query types, ensuring a broad exposure to real-world data challenges.
- Ideal for both absolute beginners seeking a robust start and intermediate users aiming to sharpen their existing SQL skills and discover new patterns.
- Understand common database operations and data retrieval techniques through direct application and problem-solving, reinforcing concepts immediately.
- Leverage a course structure that encourages daily engagement and habit formation, fostering long-term retention and continuous skill development.
- Explore various SQL constructs and clauses by implementing them in diverse scenarios, ensuring a comprehensive understanding of their utility.
- Develop a strong sense of accomplishment and progressive improvement as you successfully complete each daily coding challenge, building momentum.
Requirements / Prerequisites
- Basic computer literacy and web navigation skills are necessary to access course materials effectively.
- A stable internet connection is required to stream video content, access exercise prompts, and potentially use online SQL editors.
- While no prior SQL knowledge is strictly mandated, a curious mind and willingness to learn independently will greatly enhance your experience.
- Comfort with basic programming logic or a conceptual understanding of data organization will be beneficial but is not a hard prerequisite.
- Access to a computer (desktop or laptop) where you can either install a local SQL environment or utilize online SQL sandbox platforms for executing queries.
- A commitment to consistent, ideally daily, practice is crucial for maximizing the benefits of this 100-day challenge and solidifying your learning.
- An eagerness to experiment with code, debug your solutions, and compare your approaches to provided answers is highly encouraged for deeper learning.
- No specific software purchase is required; the course design likely accommodates free and accessible tools for query execution.
- A desire to transform raw data into meaningful insights using powerful database queries forms the core motivation for undertaking this challenge.
Skills Covered / Tools Used
- Core SQL Data Retrieval: Master the fundamental SELECT statement, including column selection, aliases, and distinct values.
- Data Filtering: Effectively use the WHERE clause with operators (AND, OR, NOT, IN, BETWEEN, LIKE) to filter records.
- Data Sorting: Arrange query results using the ORDER BY clause (ASC/DESC) for logical presentation.
- Data Grouping and Aggregation: Apply GROUP BY and aggregate functions (COUNT, SUM, AVG, MIN, MAX) for summarized data.
- Conditional Grouping: Filter grouped data using the HAVING clause, understanding its distinction from WHERE.
- Limiting Results: Control row counts using LIMIT (or TOP/ROWNUM equivalents for specific SQL dialects).
- Relational Joins: Combine data from multiple tables using INNER, LEFT, RIGHT, and potentially FULL OUTER JOINs.
- Subqueries and Nested Queries: Write powerful, complex queries by embedding one query within another.
- Basic Data Manipulation Language (DML): Exposure to INSERT, UPDATE, DELETE for data management.
- Common Table Expressions (CTEs): Structure complex queries using WITH clauses for readability.
- String and Date Functions: Utilize essential built-in functions for manipulating text (e.g., CONCAT, SUBSTRING) and dates (e.g., DATE_FORMAT, DATEDIFF).
- Case Statements: Implement conditional logic using CASE WHEN THEN ELSE END for flexible data categorization.
- Database Interaction: Practice executing queries in environments simulating real-world database interaction (online interpreter or local client).
- Problem-Solving Methodologies: Develop a systematic approach to breaking down complex data challenges into manageable SQL queries.
Benefits / Outcomes
- Achieve a strong, practical SQL foundation, confidently interacting with databases and extracting valuable information.
- Significantly enhance your problem-solving abilities by consistently applying SQL concepts to a diverse range of analytical challenges.
- Develop the essential skill of translating business questions and data requirements into effective and efficient SQL queries.
- Gain the competence to perform various data analysis tasks, including data extraction, transformation, filtering, and aggregation.
- Be well-prepared for entry-level to intermediate SQL job interviews, armed with practical query-writing experience.
- Cultivate a valuable daily coding habit, promoting continuous learning and skill retention far beyond the course’s completion.
- Build confidence in your ability to independently write, debug, and optimize SQL queries for various data retrieval and manipulation needs.
- Understand how to effectively join disparate datasets, providing a holistic view of information stored across multiple tables.
- Improve your understanding of relational database principles through direct interaction and manipulation of structured data.
- Accelerate your learning curve by focusing on active recall and immediate application, a proven method for solidifying new knowledge.
- Empower yourself to become a more data-driven professional, capable of querying, analyzing, and reporting on information directly.
- Receive a significant boost in your technical skillset, making you a more versatile and attractive candidate in the job market.
PROS
- High Volume of Practice: Offers 100 distinct coding exercises for extensive hands-on experience.
- Structured Daily Challenge: “100 Days” format promotes consistency, discipline, and habit formation for steady progress.
- Hands-On Focus: Emphasizes practical application, ideal for kinesthetic learners and skill development over theory.
- Efficiency for Busy Learners: Short, daily segments are perfect for integrating learning into a packed schedule without feeling overwhelmed.
- Reinforces Core Concepts: Repeated exposure to different problem types helps solidify understanding of fundamental SQL commands.
- Excellent for Interview Prep: Provides a robust collection of common SQL problems, invaluable for practicing before technical interviews.
- Self-Paced and Flexible: Learners can progress at their own speed, revisiting exercises as needed, adapting to individual learning styles.
- Credibility and Popularity: A high rating of 4.34/5 from over 21,000 students indicates a well-received and effective learning experience.
- Current Content: The “June 2024 update” ensures the course material is recent and relevant to current SQL practices.
- Immediate Application: Encourages direct coding, which is the most effective way to learn and internalize SQL syntax and logic.
CONS
- The extremely short total duration (30 minutes) suggests minimal in-depth theoretical explanations, requiring learners to seek external resources for comprehensive conceptual understanding or advanced topics.