Learn the basics of databases and relational data
Understand tables, rows, columns, primary keys, and foreign keys
Learn core SQL commands: SELECT, INSERT, UPDATE, DELETE
Practice filtering with WHERE, AND, OR, IN, BETWEEN, LIKE
Learn sorting with ORDER BY
Learn aggregation with COUNT, SUM, AVG, MIN, MAX
Practice grouping with GROUP BY and HAVING
Learn joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN
Learn subqueries and nested queries
Learn set operations: UNION, UNION ALL, INTERSECT, EXCEPT
Study database constraints: NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK
Learn how to create and modify tables with CREATE, ALTER, DROP
Practice with real datasets
Use an online SQL playground or install a local database
Write queries daily
Solve SQL exercises and challenges
Read and analyze existing SQL queries
Learn database normalization basics
Practice indexing and query performance basics
Learn transactions and ACID concepts
Use SQL in a small project
Review query results and fix mistakes
Learn database-specific SQL differences
Keep practicing advanced topics like window functions and CTEs