Complete SQL for Interview

This digital product is a complete, placement-oriented SQL course designed to help students, freshers, and working professionals crack SQL interviews and build strong database fundamentals required for software, data, and analytics roles.

The course is structured from beginner to advanced level, focusing on concept clarity, real interview questions, and hands-on SQL queries commonly asked in technical interviews.

Topics Covered in This SQL Product

1. SQL Fundamentals

1. What is SQL & DBMS
2. Types of Databases
3. RDBMS Concepts
4. Tables, Rows, Columns
5. Data Types
6. Primary Key & Foreign Key
7. Constraints (NOT NULL, UNIQUE, CHECK, DEFAULT)

2. Data Definition Language (DDL)

1. CREATE
2. ALTER
3. DROP
4. TRUNCATE
5. RENAME
6. Table structure modifications

3. Data Manipulation Language (DML)

1. INSERT
2. UPDATE
3. DELETE
4. Bulk data operations
5. Handling NULL values

4. Data Query Language (DQL)

1. SELECT statement
2. DISTINCT
3. WHERE clause
4. ORDER BY
5. LIMIT / TOP
6. Aliases

5. SQL Operators

1. Arithmetic Operators
2. Comparison Operators
3. Logical Operators (AND, OR, NOT)
4. BETWEEN, IN
5. LIKE & Wildcards
6. IS NULL / IS NOT NULL

6. Aggregate Functions

1. COUNT()
2. SUM()
3. AVG()
4. MIN()
5. MAX()
6. GROUP BY
7. HAVING clause
8. Difference between WHERE vs HAVING

7. Joins (Very Important for Placements)

1. INNER JOIN
2. LEFT JOIN
3. RIGHT JOIN
4. FULL JOIN
5. SELF JOIN
6. CROSS JOIN
7. Join-based interview problems

8. Subqueries

1. Single-row subqueries
2. Multi-row subqueries
3. Nested subqueries
4. Correlated subqueries
5. Subqueries with SELECT, WHERE, FROM

9. SQL Functions

1. String Functions
2. Numeric Functions
3. Date & Time Functions
4. Conversion Functions
5. CASE statement

10. Constraints & Keys

1. Primary Key
2. Foreign Key
3. Composite Key
4. Candidate Key
5. Referential Integrity

11. Views & Indexes

1. Creating and using Views
2. Advantages of Views
3. Indexes
4. Types of Indexes
5. Performance optimization basics

12. Transactions & TCL

1. Transaction concepts
2. COMMIT
3. ROLLBACK
4. SAVEPOINT
5. ACID properties

13. SQL Interview Questions & Queries

1. Most frequently asked SQL interview questions
2. Company-level SQL queries
3. Real-world database scenarios
4. Query optimization basics
5. Common mistakes & best practices

Who Should Buy This Product?

1. Students preparing for campus placements
2. Freshers applying for software, data analyst, or backend roles
3. Professionals revising SQL for interviews
4. Anyone who wants strong SQL fundamentals

Outcome After Completing This Course

1. Strong SQL foundation
2. Confidence to solve any SQL interview question
3. Clear understanding of real-world database queries
4. Placement-ready SQL knowledge