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Database and SQL Foundations

Build a product-neutral SQL foundation from relational databases through CREATE, ALTER, DROP, INSERT, SELECT, ORDER BY, UPDATE, DELETE, filters, JOINs, aggregation, subqueries, transactions, locks, indexes, views, and functions, with explicit notes for MySQL, PostgreSQL, SQLite, SQL Server, and other dialect differences.

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Table of Contents

Chapter 1: SQL and Tables

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1.1 What Databases and SQL Are
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1.2 DDL: CREATE, ALTER, DROP
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1.3 INSERT, SELECT, ORDER BY, UPDATE, DELETE

Chapter 2: Querying Data

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2.1 Filtering with LIKE, REGEXP, BETWEEN, IN, Date and Time
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2.2 PRIMARY KEY, FOREIGN KEY, and JOIN
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2.3 GROUP BY and HAVING
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2.4 UNION, Subqueries, ANY, and ALL

Chapter 3: Reliability and Performance

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3.1 Transactions and Locks
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3.2 INDEX, VIEW, and FUNCTION

SUITABLE AUDIENCE

Beginners preparing for backend development, data analysis, database courses, or business data work; also useful for learners who know some SQL but get confused by product-specific syntax.

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