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Xem thêm: 973 MySQL in a nutshell, 2nd edition , Chapter 4. Security and User Statements and Functions, Chapter 5. Database and Table Schema Statements, Chapter 6. Data Manipulation Statements and Functions, Chapter 7. Table and Server Administration Statements and Functions, Chapter 8. Replication Statements and Functions, Chapter 10. Aggregate Clauses, Aggregate Functions, and Subqueries, Chapter 12. Date and Time Functions, Chapter 15. MySQL Server and Client, Appendix C. Server and Environment Variables