Hi,
I'm a DB expert from Bulgaria(EU) with strong experience in wide variety of RDBMS: MySQL, PostgreSQL, MS SQL Server, Oracle, Teradata and a few others..
I have a solid knowledge in writing and tuning complex SQL queries, functions, stored procedures, etc...
Besides that, I'm well familiar with the internals of the mentioned RDBMS, so I feel comfortable performance tuning and optimizing the database engines and structures (tables, indexes, statistics).
Best Regards,
Veselin Z.