Coding_knowledge

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🛡️ *Cybersecurity with Ethical Hacking: Learn to Think Like a Hacker!* 🧠 🎯 *What You’ll Learn:* ✅ Basics of cybersecurity & common threats ✅ Introduction to ethical hacking tools & techniques ✅ How to identify and prevent vulnerabilities ✅ Real-world case studies & demos 📅 Date: *26th June 2025* ⏰ Time: *7:00 PM* 🎁 *Includes: Certificate + Live Q&A +Gift* 🔗 👉 Register now and level up your cyber skills! 👇 https://forms.gle/AnXDmiE58ACyzRJo9

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Hi guys 👋, if you're repeatedly facing challenges in SQL interviews, I've written an eBook with 1000+ SQL interview questions and answers. Studying these questions can help you easily crack any SQL interview. If you want to ace your next interview, grab the book from the link below 👇. Note that the price will increase soon! Ebook Link :- https://rzp.io/rzp/Duraeq1

*🗄️ SQL Roadmap :* 👇 | |── *Basics* | ├── What is SQL? | ├── Databases & Tables | └── CRUD Operations (Create, Read, Update, Delete) | |── *Data Retrieval* | ├── SELECT, FROM, WHERE | ├── DISTINCT, ORDER BY, LIMIT | └── BETWEEN, IN, LIKE, IS NULL | |── *Filtering & Conditions* | ├── AND, OR, NOT | └── Nested Conditions | |── *Joins* | ├── INNER JOIN | ├── LEFT JOIN / RIGHT JOIN | └── FULL OUTER JOIN, SELF JOIN | |── *Grouping & Aggregation* | ├── GROUP BY | ├── Aggregate Functions: COUNT(), SUM(), AVG(), MIN(), MAX() | └── HAVING (post-aggregation filtering) | |── *Subqueries & Nested SELECT* | ├── In WHERE / FROM clauses | └── Correlated Subqueries | |── *Advanced SQL* | ├── CASE Statements | ├── COALESCE() / NULLIF() | └── EXISTS / NOT EXISTS | |── *Window Functions* | ├── ROW_NUMBER(), RANK(), DENSE_RANK() | ├── LEAD(), LAG() | └── PARTITION BY, OVER() | |── *Common Table Expressions (CTEs)* | ├── WITH clause | └── Recursive CTEs | |── *Data Modification* | ├── INSERT INTO, VALUES | ├── UPDATE + SET | └── DELETE FROM | |── *Database Design Concepts* | ├── Normalization (1NF, 2NF, 3NF) | └── Primary & Foreign Keys | |── *Indexes & Performance* | ├── Index Basics | ├── Query Optimization | └── EXPLAIN / ANALYZE | |── *Tools & Platforms* | ├── MySQL, PostgreSQL | ├── SQL Server, Oracle | └── BigQuery, Snowflake | |── END __ 💬 *Double Tap ❤️ for more!* 📊

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Preparing for a SQL interview? Focus on mastering these essential topics: 1. Joins: Get comfortable with inner, left, right, and outer joins. Knowing when to use what kind of join is important! 2. Window Functions: Understand when to use ROW_NUMBER, RANK(), DENSE_RANK(), LAG, and LEAD for complex analytical queries. 3. Query Execution Order: Know the sequence from FROM to ORDER BY. This is crucial for writing efficient, error-free queries. 4. Common Table Expressions (CTEs): Use CTEs to simplify and structure complex queries for better readability. 5. Aggregations & Window Functions: Combine aggregate functions with window functions for in-depth data analysis. 6. Subqueries: Learn how to use subqueries effectively within main SQL statements for complex data manipulations. 7. Handling NULLs: Be adept at managing NULL values to ensure accurate data processing and avoid potential pitfalls. 8. Indexing: Understand how proper indexing can significantly boost query performance. 9. GROUP BY & HAVING: Master grouping data and filtering groups with HAVING to refine your query results. 10. String Manipulation Functions: Get familiar with string functions like CONCAT, SUBSTRING, and REPLACE to handle text data efficiently. 11. Set Operations: Know how to use UNION, INTERSECT, and EXCEPT to combine or compare result sets. 12. Optimizing Queries: Learn techniques to optimize your queries for performance, especially with large datasets. If we master/ Practice in these topics we can track any SQL interviews.. Like this post if you need more 👍❤️ Hope it helps :)

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