SQL/Complete SQL Content at main · Rutujamhaske03/SQL · GitHub

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# 📘 Complete SQL Syllabus Guide

A beginner-to-advanced SQL study guide covering key concepts, queries, joins, subqueries, constraints, and more. Ideal for interviews, academic revision, and self-paced learning.

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## 📖 Chapters & Topics

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### C1. Introduction to SQL
- What is SQL
- Data
- Database
- DBMS
- RDBMS
- Difference between DBMS and RDBMS
- Relational Model and Table
- E.F Codd Rules

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### C2. Data Types
- What is Data Type and its Types
- CHAR
- VARCHAR / VARCHAR2
- DATE
- NUMBER
- BLOB / CLOB

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### C3. Constraints
- What is Constraint and its Types
- UNIQUE
- NOT NULL
- CHECK
- PRIMARY KEY – FOREIGN KEY (Part 1 & 2)

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### C4. Overview of SQL Statements
- Data Definition Language (DDL)
- Data Manipulation Language (DML)
- Transaction Control Language (TCL)
- Data Control Language (DCL)
- Data Query Language (DQL)

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### C5. Oracle SQL Plus Database Installation

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### C6. Data Query Language (DQL)
- SELECT
- PROJECTION
- SELECTION
- JOINS

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### C7. Projection
- SELECT Clause
- FROM Clause
- DISTINCT Clause
- Expression and Alias

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### C8. Selection
- What is Selection and its Syntax

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### C9. Operators
- Concatenation Operators (`||`)
- Logical Operators (AND, OR, NOT)
- Special Operators:
  - IN / NOT IN
  - BETWEEN / NOT BETWEEN
  - IS / IS NOT
  - LIKE / NOT LIKE

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### C10. Functions
- What is Function and Types
- Multi-Row Functions

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### C11. GROUP BY Clause

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### C12. HAVING Clause
- Difference between WHERE and HAVING

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### C13. ORDER BY Clause

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### C14. Subqueries
- What is Subquery?
- When & Why Use Subquery?
- Subquery Cases
- Types of Subqueries
- Subquery Operators (ALL, ANY)
- Nested Subqueries
- EMP – MGR Relationship (Case 1 & 2)

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### C15. Joins
- What is Join?
- Types of Joins:
  - Cartesian / Cross Join
  - Inner / Equi Join
  - Natural Join
  - Outer Join
  - Self Join
  - Multiple Conditions on Joins

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### C16. Co-Related Subquery
- What is Co-Related Subquery?
- EXISTS / NOT EXISTS
- Nth Max / Min Value

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### C17. Data Definition Language (DDL)
- CREATE
- RENAME
- ALTER (Add/Remove/Modify Column, DataType, Constraints)
- TRUNCATE
- DROP

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### C18. Data Manipulation Language (DML)
- INSERT
- UPDATE
- DELETE

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### C19. Transaction Control Language (TCL)
- COMMIT
- ROLLBACK
- SAVEPOINT

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### C20. Data Control Language (DCL)
- GRANT
- REVOKE

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### C21. Single Row Functions (SRF)
- LENGTH()
- CONCAT()
- MOD()
- UPPER(), LOWER(), INITCAP()
- REVERSE()
- SUBSTR(), INSTR()
- REPLACE()
- TRUNC(), ROUND()
- MONTHS_BETWEEN(), LAST_DAY()
- TO_CHAR()
- NVL()

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### C22. Normalization
- Attributes
- Functional Dependencies and Types
- 1NF, 2NF, 3NF, BCNF

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## 🧠 How to Use
- Use this as a reference or checklist while learning or revising SQL.
- Great for interviews and written tests.
- Can be used for teaching or mentoring beginners in databases.

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