SQL Interview Mastery
Master SQL from the ground up and be ready for any database question in a technical interview. Covers queries, JOINs, aggregates, indexes, subqueries, transactions, and normalization.
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Indexes & Performance
Intermediate
Make your queries 100x faster by understanding how indexes work and when to use them.
11 min
·
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Subqueries
Intermediate
Write queries inside queries — correlated subqueries, derived tables, EXISTS vs IN.
10 min
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2 views
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Ensure data integrity with transactions and understand the ACID properties every interviewer asks about.
11 min
·
31 views
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SQL CTEs: WITH Clause and Recursive Queries
Intermediate
Understand 1NF, 2NF, 3NF and why they prevent data anomalies.
10 min
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1 views
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Practice the top 25 SQL interview questions with complete solutions.
12 min
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Laravel Eloquent ORM: Relationships, Eager Loading and Query Builder
33 views
SQL Window Functions: ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD Explained
31 views
System Design Interview: Design a Chat Application Like WhatsApp
25 views
PHP File Handling: Read, Write, and Manage Files
21 views
Git Conflict Resolution
20 views
PHP Input Validation: Never Trust User Data
Jun 3, 2026
PHP Magic Methods: __construct, __get, __set, __toString and More
Jun 2, 2026
PHP Static Methods and Properties Explained
Jun 1, 2026
PHP Abstract Classes vs Interfaces: Know the Difference
May 31, 2026
PHP Arrow Functions and Closures Explained
May 30, 2026