No-SQL databases are non-relational stores that do not require a fixed schema and avoid join operations. They are used by large companies like Google, Facebook, and Oracle. No-SQL databases are schema-free, do not require vacuuming, and are not fully transactional like traditional SQL databases.

1. Your Guide to No-SQL (Glossary)

2. “non-relational data stores that do not need a fixed schema, and that usually avoid join operations” (Wikipedia, how much more authoritative do you need)

3. GROUP BY ?

4. Map Reduce

5. Joins?

6. Multiple++ Map Reduce

7. Table Scan?

8. Multi-Machine Map Reduce

9. ORDER BY…LIMIT

10. Natural Data Order

11. Map Reduce

12. What about the Features?

13. Forward Rolling Log?

14. No need for a Vacuum

15. “Re-inventing MyISAM is not a selling point.” -Mark Callaghan Oracle, Google, Facebook

16. Non-Transactional?

18. Schema Free!

20. I know where everything is, please do not touch.

21. SQL Sucks!

23. 6% of the power on the planet goes to data centers!