He know how to write the SQL queries, and also he has a deep understanding of relational algebra, which is the technology behind SQL. He has extensive experience with SQL, knows a lot, not only on how to use SQL, but also the theoretical parts like normalization and security. He is also a very good and understanding teacher, with great ways of explaining advanced topics in simple words. Totally recommend his SQL lessons.
Bob is an excellent tutor and helped me to understand important foundational concepts in Data Warehousing and SQL queries. Bob went above and beyond by locating and discussing additional reference material that helped illustrate key advanced SQL query examples such as SQL ROLLUP and CUBE. I will seek out Bob as my tutor for anything related to SQL and Data Warehousing.
Larry is teaching me SQL, and I just had one lesson so far- but it has been extremely informative! He started from very basic and explained all the powerful ways SQL can be used, it is clear that he is very knowledgeable and what was particularly valuable was that this has given me a goal for what I want to know and implement using SQL. I look forward to future lessons! So far very easy to understand and thorough! Thank you, Larry,