Скачать или смотреть Data Analytics Course Weekend Batch SQL Training : Session 6

SQL DDL Commands Explained | Create Table, Primary Key, Foreign Key, Insert, Alter, Constraints | Palin Analytics Institute

In this detailed SQL training session by Palin Analytics Institute, we dive deep into the fundamentals of Database Management Systems (DBMS) and learn how to work with DDL (Data Definition Language) commands.
This session is essential for beginners, data analysts, aspiring data engineers, and anyone preparing for SQL interviews.

🔍 What You Will Learn in This Video
✅ 1. Data Selection & Querying

SELECT command

WHERE, GROUP BY, HAVING

JOIN basics (left join, right join, inner join)

Fetching & filtering table data

Concept of schema and multi-table queries

✅ 2. Data Definition Language (DDL)

Understand how to define and create data structures, including:

CREATE DATABASE

CREATE TABLE

DROP TABLE

ALTER TABLE

Data types: numeric, character, date, boolean

✅ 3. Keys & Constraints

A complete breakdown of:

Primary Key

Foreign Key

Unique Key

NOT NULL

Referential Integrity

Importance of connecting tables (Employee–Department, Department–Location, etc.)

✅ 4. Insert & Manage Data

INSERT INTO with values

Handling errors like primary key violation

NULL vs NOT NULL

Inserting data into related tables

Foreign key error handling

✅ 5. Altering Table Structure

ADD column

MODIFY/ALTER column

Adding constraints

Changing field lengths

Updating existing table structure without losing data

✅ 6. Real-World Industry Use

Why a Data Analyst must know SQL DDL

Role of DDL in Data Engineering & Database Administration

How constraints ensure data accuracy & integrity

This session also explains practical SQL troubleshooting like:

"Arithmetic overflow"

"Foreign key constraint failed"

"Duplicate primary key error"

🎓 Who Should Watch This Video?

Data Analysts

Data Science students

Database beginners

SQL learners preparing for interviews

Anyone working with relational databases

💡 Key Benefits of This Video

Build strong SQL fundamentals

Learn to design real database structures

Understand how multiple tables connect

Practical demo of CREATE, INSERT, ALTER, and constraints

Perfect foundation for advanced SQL (joins, subqueries, indexing, etc.)

🔖 Hashtags

#SQLTutorial #DDLTutorial #CreateTable #PrimaryKey #ForeignKey #SQLForBeginners #DatabaseManagement #SQLConstraints #PalinAnalyticsInstitute #DataAnalystTraining #LearnSQL #SQLPractice