1. 1. SQL
   1. 1.1. RDBMS - Relational Databases
   2. 1.2. Popular Relational Databases
   3. 1.3. NoSQL
   4. 1.4. SQL Standards
   5. 1.5. Description
   6. 1.6. Schemas
   7. 1.7. CREATE TABLE
   8. 1.8. DML - Data Manipulation Language
   9. 1.9. INSERT
   10. 1.10. SELECT
   11. 1.11. NULL
   12. 1.12. Reject INSERT
   13. 1.13. SELECT WHERE
   14. 1.14. WHERE not
   15. 1.15. SELECT WHERE
   16. 1.16. Aggregates
   17. 1.17. constraints
   18. 1.18. PRIMARY KEY
   19. 1.19. ACID