The Complete SQL Course: Become a MYSQL Master

Learn how to create a table in a database and define columns and data types. Verify the table structure by creating a sample users table.

Describe a table to view its structure and names, inspect information about the table, and use create table and drop table commands to manage tables.

Learn how to update and delete records in a MySQL table, including changing a username with the update statement and using a where clause to specify targets; see practical examples.

Learn how to create foreign keys to link tables and enforce relationships in SQL, using a category and posts example with references and cascade actions.

Create a unique index in MySQL by specifying the table and column, verify its uniqueness, and learn how to drop the index when needed.

Learn how to use sequel functions to retrieve data from a database, including sum, average, max, and count, by selecting columns from a table.

Learn how SQL aggregate functions work, using avg for numbers, and max and count for numbers and text. See how max returns the highest value and count counts rows.

Learn to form basic queries using select from and where clauses to retrieve specific data from your database. Discover how conditions filter results.

Learn how to use select distinct to remove duplicates in SQL queries, applying it to table columns like password or user id, with practical examples on a users table.

Explore how to alter tables in MySQL, add columns with constraints, set defaults like current timestamp, and drop columns to modify schemas efficiently.

Learn how to use alter table to move and modify a column, rename a column, and change a column's data type to text, then verify changes in the table structure.

Learn how to use sql aliases to give temporary names to columns or tables, using as to simplify queries and improve readability with practical examples.

Learn to use unions to combine usernames and titles from the same or different tables, ensure matching column counts, apply aliases, and extend to multiple columns.

Learn how views create virtual tables to access data across tables, and how to create, insert into, update, and delete via views, including unions.

Create and define a function with parameters, illustrate concatenating the username and the password, return the result, then call the function in a normal query and optionally drop it.

Explore creating SQL triggers that run automatically, such as a before insert trigger on the users table to capitalize new usernames, and extend triggers to populate related notes data.