SQL in MySQL

Relational database models

• Relational operators
• Characteristics of declarative SQL language
• SQL syntax
• Division language DQL, DML, DDL, DCL

• SELECT queries.
• Aliases columns of tables
• Service date (DATE types, display functions, formatting)
• Group Features
• Combining internal and external tables (JOIN clause)
• UNION operator
• Nested Subqueries (the WHERE clause, the table name, column name)
• Correlated subqueries

• Inserting rows (INSERT clause)
• Inserting rows by request
• Variation of the rows (UPDATE)
• Delete rows (DELETE)

• Creating, altering and dropping objects (CREATE, ALTER, DROP)
• Creating tables using subquery (CREATE TABLE .... AS SELECT...)

• Options NULL and NOT NULL
• CONSTRAINT clause
• ENUM type
• type SET
• PRIMARY KEY condition
• UNIQUE condition
• FOREIGN KEY condition
• DEFAULT clause

• The command COMMIT, ROLLBACK, SAVEPOINT