innodb (rbdms) vs. myisam (toy rdbms)
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1. row locks vs. table locks - think concurrency, many user accessing the system at the same time
2. transactions (ACID compliant) vs. no transactions - think omg where is my data, why is my table corrupt
3. clustered indexes (clustered btree) vs. btree (non clustered) - think why does it take me 2 mins to query 10 million rows
4. oracle bought innodb vs. oracle laughed at myisam - myisam is like dbase III from Ashton Tate - it's like 100 years old.
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