Lesson 01
Database là gì, vì sao cần, file phẳng vs DBMS, OLTP vs OLAP.
Lesson 02
Table, row, column, schema, domain, NULL — nền tảng của SQL.
Lesson 03
SELECT, WHERE, ORDER BY, INSERT, UPDATE, DELETE.
Lesson 04
JOIN (inner/outer), GROUP BY, aggregate, subquery, HAVING.
Lesson 05
Primary key, foreign key, unique, check, referential integrity.
Lesson 06
Entity-relationship, cardinality, ánh xạ ER → bảng.