Скачать или смотреть SQL Beginners Guide - Schema, Alter, Update, Where and Identity

Dive into the world of SQL database management! This tutorial covers essential concepts and commands, including:

*SQL Schemas:* Learn how schemas organize database objects like tables and views, providing structure and security. We'll explain why they're crucial for managing complex databases and how they improve organization.

*ALTER Statements:* Master the `ALTER TABLE` command to modify existing tables. We'll demonstrate how to add, modify, and delete columns, change data types, and manage constraints. Learn how to adapt your database structure as your needs evolve.

*UPDATE Statements:* See how to use the `UPDATE` command to modify data within your tables. We'll cover how to update specific columns, use `WHERE` clauses for targeted updates, and discuss best practices for avoiding accidental data corruption.

*Identity Columns:* Explore the power of identity columns (also known as auto-incrementing columns). Learn how they automatically generate unique values, simplifying data insertion and ensuring data integrity.

*WHERE Clause:* Understand the fundamental `WHERE` clause for filtering data in `SELECT`, `UPDATE`, and `DELETE` statements. We'll show you how to use comparison operators, logical operators, and other conditions to precisely target the data you want to work with.

Whether you're a beginner or looking to refresh your SQL skills, this video provides a clear and concise explanation of these core concepts. We'll use practical examples to illustrate each topic, making it easy to follow along and apply your new knowledge.

Chapters
00:00 Intro
0:17 Databases and Tables
1:01 Schema
3:19 Alter
4:20 Update
6:52 Where
7:39 Identity
9:39 Outro

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