Comment by flannell

I guess the acronym gives it away, Structured Query Language. Things can get pretty hairy when playing around with triggers, indexes and foreign keys, not just the SQL itself. I'd imagine for 85k you'd need to have experience in replication and table partitioning. I also think the difference between a 25K and 85K developer would be the difference in execution time of a SQL block of code. It's amazing how much you can speed up queries by re-factoring the code as well as knowledge of using different types of indexing strategies. I've used SQL for 15 years, but not exclusively - it's always wrapped up with other needed skills. HTH!