Hackerrank-SQL-Certificate-Test-Solution

🌐 Welcome to my HackerRank SQL Certificate Test Solutions Repository! 🚀

SQL (Basic)

Explore the foundational concepts of SQL with these fundamental queries, relationships, and aggregators.

• Simple Queries: Master the art of crafting straightforward queries.
• Relationships: Understand the connections between tables and how to navigate them.
• Aggregators: Learn to summarize and analyze data using aggregate functions.

Questions -

• 1. Student Advisor
• 2. Student Analysis

SQL (Intermediate)

Dive deeper into SQL with complex joins, unions, and sub-queries.

• Complex Joins: Navigate through intricate relationships between tables.
• Unions: Combine results from multiple queries efficiently.
• Sub-queries: Enhance your querying skills with nested queries.

Questions -

• 1. Products Without Sales
• 2. Product Sales Per City

SQL (Advanced)

Take your SQL expertise to the next level with advanced topics.

• Query Optimization: Optimize your queries for better performance.
• Data Modeling: Design efficient and effective database structures.
• Indexing: Explore the power of indexing for faster data retrieval.
• Window Functions: Analyze and visualize data using window functions.
• Pivots in SQL: Transform your data with pivot operations.

Questions -

• 1. Crypto Market Algorithm
• 2. Weekend Hours

Feel free to explore, contribute, and elevate your SQL proficiency! 💻✨