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SQL HackerRank Challenge: Get Gold star & 670 points

Master MySQL & PostgreSQL! Boost your SQL skills with HackerRank challenges. Aim for a Gold star & 670+ points. Practical database experience.

4.7(132)
18,254students
11h 40m
Certificate
Start-Tech Trainings
Start-Tech TrainingsAnalytics and ML academy

Course Content

SQL HackerRank Challenge: Get Gold star & 670 points is an all-levels Udemy course taught by Start-Tech Trainings. It runs 11h 40m, is taught in English, and includes a certificate of completion. Learners rate it 4.7 out of 5 from 132 reviews, with 18,254 students enrolled. It is a paid course, last updated September 2025.

Master SQL for Data Analysis: A Comprehensive Course

6 Reasons to Choose This SQL Course

Unlock your potential in data analysis with our comprehensive SQL course! Here's why it's the perfect choice:

  • Practical Case Studies: Solve complete 20 questions from the challenging 'Weather Observation Station' case study on HackerRank.
  • Diverse Practice: We'll tackle a variety of other engaging HackerRank SQL case studies, including challenges like 'The Pads Binary Tree Nodes,' 'New Companies,' 'The Report,' 'Top Companies,' 'Ollivander's Inventory,' 'Challenges,' 'Contest Leaderboard,' 'Placements,' and 'Symmetric Pairs.'
  • Comprehensive Curriculum: Learn everything you need for data analysis, covering both basic and advanced SQL statements in PostgreSQL and MySQL.
  • Downloadable Resources: Access valuable downloadable materials to reinforce your learning on key SQL topics.
  • Instructor Support: Get your SQL queries and questions answered directly by the instructors.
  • Verifiable Certificate: Receive a certificate of completion upon finishing the course – a valuable addition to your resume.

This complete SQL tutorial can be completed in a weekend! SQL is a highly sought-after skill for data analysis roles across all industries. Proficiency in PostgreSQL and MySQL is highly desirable for both database management and data analysis positions. Whether you're aiming to launch a career as a data scientist or enhance your existing data analysis skills, this course equips you with the necessary knowledge.

Why Are We Qualified to Teach You SQL?

Our instructors, Abhishek, Pukhraj, and Nadeem, have over a decade of experience teaching Data Science and Machine Learning. They possess in-depth knowledge of advanced SQL, PostgreSQL, MySQL, database management, and various data analysis tools.

Our Promise to You

We are dedicated to your success! Don't hesitate to ask questions about the course content, practice sheets, or any topic. Post your questions in the course or send us a direct message.

By the end of this course, you'll have a strong foundation in SQL and the confidence to apply it to data analysis as a rewarding career path.

Ready to start? Click the enroll button and join us in lesson 1!

Start-Tech Academy

Why Learn SQL?

SQL (Structured Query Language) is the universal language for interacting with databases, powering popular database engines like PostgreSQL, SQL Server, SQLite, and MySQL. If you need to access data, you need SQL.

SQL is surprisingly easy to learn! It's a query language designed to allow anyone to retrieve valuable information from databases. Its English-like syntax makes it accessible even to those with basic English skills.

SQL skills are in high demand, leading to excellent career opportunities and earning potential.

How Long Does It Take to Learn SQL?

The time it takes to learn SQL varies depending on your dedication and practice. Our course is designed to accelerate your learning, taking you from beginner to advanced concepts in a manageable timeframe. Practice is crucial – consistent application is the key to mastering SQL quickly.

SQL vs. PostgreSQL: What's the Difference?

SQL is the language; PostgreSQL is a specific database system (Relational Database Management System or RDBMS). Think of SQL as the language you use to communicate with the database, and PostgreSQL as one of the many database systems that understand that language. Other popular RDBMSs include Oracle, Informix, and MySQL. While different systems may have slight variations in SQL syntax, they all adhere to the core SQL standard.

PostgreSQL vs. MySQL: Which is Better?

Both PostgreSQL and MySQL are powerful database systems with unique strengths. PostgreSQL excels in features for traditional database applications, while MySQL is optimized for faster performance in web-based applications. Both are open-source and continuously evolving.

Who Uses PostgreSQL and MySQL?

Here are some examples of companies leveraging these databases:

PostgreSQL Users: Apple, BioPharm, Etsy, IMDB, Macworld, Debian, Fujitsu, Red Hat, Sun Microsystem, Cisco, Skype.

MySQL Users: Uber, Airbnb, Netflix, Udemy, Pinterest, etc.

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