This. SQL is just a tool for expressing your thinking and learning it doesn't help you to problem solve. The theory, both relational algebra and set theory, will teach you how to think about the problems, not how to express your thinking. That's what's necessary to solve difficult SQL problems.
This. SQL is just a tool for expressing your thinking and learning it doesn't help you to problem solve. The theory, both relational algebra and set theory, will teach you how to think about the problems, not how to express your thinking. That's what's necessary to solve difficult SQL problems.