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600+ Sql Interview Questions


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600+ Sql Interview Questions
Published 3/2025
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz
Language: English | Size: 155.73 MB | Duration: 3h 7m
Get ready for an SQL interview: 600+ Real-world SQL questions and practical answers.
[b]What you'll learn[/b]

Master SQL Fundamentals
Write Complex SQL Queries
Learn how to use Joins, Subqueries, Common Table Expressions (CTEs), and Aggregations effectively
Work with Indexing & Performance Tuning
Learn SQL Functions & Stored Procedures
Prepare with Video-Based Revisions & Hands-on Exercises
Strengthen your understanding with revision lectures and practical coding exercises for interview success
[b]Requirements[/b]
This course is suitable for learners with basic SQL knowledge who want to strengthen their skills and prepare for SQL Developer interviews.
[b]Description[/b]
Mastering SQL Developer Interviews: 600+ Real-World Questions & AnswersCourse Description:Are you preparing for an SQL Developer interview? This course is designed to help you master SQL concepts with 600+ real-world SQL interview questions and practical answers. Whether you're a beginner or an experienced professional, this course covers everything from fundamental SQL queries to advanced database concepts to help you excel in your interview.What You'll Learn: SQL Fundamentals - Joins, Subqueries, Normalization, Indexing, and Transactions Database Design & Optimization - Best practices for handling large datasets Advanced Concepts - Common Table Expressions (CTEs), Triggers, Stored Procedures Hands-on Practice - Real-world SQL challenges with expert solutions Interview Strategies - Avoid common pitfalls and showcase your SQL skills effectivelyCourse Highlights: Video lectures for revision - Quickly review key concepts before your interview Comprehensive Q&A discussions - 600+ real-world SQL questions with detailed explanations Practical Examples & Exercises - Strengthen your SQL skills with hands-on learningFew Sample Interview Questions Covered:Database Design & Normalization What is normalization? How do you implement normalization? What is denormalization? OLTP vs. OLAP - What's the difference? Explain the 1st, 2nd, and 3rd Normal Forms.Keys, Data Types & Indexing Primary Key vs. Unique Key Char vs. Varchar - Key Differences Char vs. NChar - How do they differ? What is the size difference between Char and NChar? What is an Index, and how does it speed up search operations?Joins & Queries What are the different types of Indexes? Clustered vs. Non-Clustered Index - When to use which? What are Inner Joins, Left Joins, Right Joins, and Cross Joins? What is UNION, and how does it differ from UNION ALL?SQL Functions & Performance Optimization What are Triggers, and why are they used? What are the types of Triggers? Functions vs. Stored Procedures - What's the difference? How do transactions work in SQL, and how do you implement them?Subqueries & CTEs What is a Subquery? Can it return multiple results? How do Subqueries compare to Joins in terms of performance? What is a Common Table Expression (CTE), and why is it useful? Can we execute a CTE multiple times?Finding the Nth Highest Salary & Advanced SQL Concepts How do you find the Nth highest salary in SQL? What are the different methods to achieve this using correlated queries and T-SQL?Who This Course Is For: Aspiring SQL Developers & Data Analysts Software Engineers working with databases Anyone preparing for SQL job interviewsWith engaging video lectures and 600+ SQL interview questions, this course will boost your confidence and help you ace your next SQL Developer interview. Enroll now and take the next step in your career!
[b]Overview[/b]
Section 1: Introduction
Lecture 1 Introduction
Section 2: Basic SQL Commands
Lecture 2 SQL Examples
Lecture 3 Data Types
Lecture 4 Questions: Data Types
Lecture 5 Revise: Aggregate Functions
Lecture 6 Aggregate Functions
Lecture 7 Questions: Aggregate Functions
Lecture 8 Revise: Distinct
Lecture 9 Distinct
Lecture 10 Questions: String Functions
Lecture 11 Questions: Date
Lecture 12 Questions: Cast
Lecture 13 Revise: Alias
Lecture 14 Questions: Limit and Offset
Section 3: Filter
Lecture 15 Understanding Filtering
Lecture 16 Revise: String
Lecture 17 Revise: Integer
Lecture 18 Questions: Basic Filtering
Lecture 19 Revise: Like
Lecture 20 Revise: Like Experiments
Lecture 21 Questions: Like Filtering
Lecture 22 Revise: Boolean
Lecture 23 Questions: Boolean
Lecture 24 Questions: NULLs
Lecture 25 Questions: Inner Queries
Lecture 26 Revise: Between
Lecture 27 Revise: Between Experiments
Section 4: Basic Group By
Lecture 28 Group By in SQL?
Lecture 29 Questions: Group By
Section 5: Union, Intersect and Sub-Queries
Lecture 30 Questions: Union
Lecture 31 Questions: Union All
Lecture 32 Questions: Intersect
Lecture 33 Questions: Sub-Queries
Section 6: Sorting
Lecture 34 Questions: Order By
Section 7: Window Functions
Lecture 35 Questions: Window Functions
Lecture 36 Questions: Ranking Functions
Lecture 37 Questions: Analytical Functions
Lecture 38 Recursive Queries with CTEs
Lecture 39 Pivot and Unpivot
Lecture 40 JSON and XML Handling in SQL
Lecture 41 Full-Text Search
Section 8: Views & Indexes
Lecture 42 Questions: Views
Lecture 43 Questions: Indexes
Lecture 44 Creating and Using Indexes
Lecture 45 Clustered vs. Non-clustered Indexes
Lecture 46 Query Execution Plans
Lecture 47 Performance Tuning Techniques
Section 9: Advanced Questions
Lecture 48 Questions: Default Constraints
Lecture 49 Questions: Conditional Functions
Section 10: SQL Joins
Lecture 50 Outer Join
Lecture 51 Questions: Outer Join
Lecture 52 Right Join
Lecture 53 Questions: Right Join
Lecture 54 Inner Join
Lecture 55 Questions: Inner Join
Lecture 56 Left Join
Lecture 57 Questions: Left Join
Lecture 58 Cross Join
Lecture 59 Questions: Cross Join
Lecture 60 Self Join
Lecture 61 Questions: Self Join
Section 11: SQL Keys
Lecture 62 Primary Keys
Lecture 63 Questions: Primary Keys
Lecture 64 Foreign Key
Lecture 65 Questions: Foreign Key
Lecture 66 Unique Constraint
Lecture 67 Questions: Unique Constraint
Lecture 68 Not Null Constraint
Lecture 69 Questions: Not Null Constraint
Lecture 70 Check Constraint
Lecture 71 Questions: Check Constraint
Lecture 72 Default Values
Lecture 73 Questions: Default Values
Section 12: Data Manipulation and ETL
Lecture 74 Bulk Insert and Update
Lecture 75 Questions: Bulk Insert and Update
Lecture 76 Data Import/Export (Copy, Load Data Infile)
Lecture 77 Questions: Data Import/Export (Copy, Load Data Infile)
Lecture 78 Working with CSV, JSON, and XML data
Lecture 79 Questions: Working with CSV, JSON, and XML data
Section 13: NoSQL and NewSQL Concepts
Lecture 80 Differences between SQL and NoSQL
Lecture 81 Questions: Differences between SQL and NoSQL
Lecture 82 Working with JSON data in PostgreSQL, MySQL, and SQL Server
Lecture 83 Questions: Working with JSON data in PostgreSQL, MySQL, and SQL Server
Lecture 84 SQL in Big Data (Google BigQuery, Apache Hive, etc.)
Lecture 85 Questions: SQL in Big Data (Google BigQuery, Apache Hive, etc.)
Aspiring SQL Developers, Data Analysts, and Database Administrators,Software Engineers working with databases,Students preparing for SQL job interviews
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