SQL Masterclass: Beginner to Expert

Write and execute sql queries in mysql, including creating databases and using them. Understand how to show databases and show create table, and apply naming conventions and comments for readability.

Explore data fundamentals, structured data and data types, and learn to design tables with constraints, write and optimize SQL queries, and use joins, subqueries, and indexes.

Learn how SQL, Structured Query Language, stores data in a relational database using tables of rows and columns, and master creating, inserting, selecting, updating, and deleting queries.

Master SQL data types and the five command families—DDL, DML, DQL, TCL, and DCL—through examples of tables, inserts, and numeric precision and storage concepts.

Explore data types in sql, including decimal, float, and double, and learn when to use char, varchar, text, and date/time types with precision, storage, and quoting rules.

Design a customers table by selecting appropriate data types and enforcing data integrity with not null, default, and check constraints, plus primary, unique, foreign, and auto keys.

Explore sql constraints including not null, default, check, unique, and primary key, and learn how foreign keys and auto increment enforce referential integrity and data quality.

Explore ddl and dml concepts, including create, alter, drop, truncate, and rename operations. Master insert, update, and delete, with implicit and explicit inserts and transaction safety.

This lecture introduces data query language (dql) and the select from where group by having order by limit syntax. It explains printing data, count aggregation, and where vs having.

Learn how normalization splits a big table into smaller tables, creates dimension and fact tables linked by primary and foreign keys, enabling joins and reducing data duplication and storage.