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The difficulty of SQL stems from relational algebra
DEV Community dev.to
In the field of structured data computing, SQL is still the most widely used working language, not only adopted by all relational databases, but also targeted by many new big data platforms.
For a certain computing technology, people usually care about two efficiencies. One is the descriptive efficiency of operations, and the other is the execution efficiency of operations. This is easy to understand. If the descriptive efficiency is too low, it means that the development cost is too high …
algebra big big data computing data databases efficiency language maths operations people platforms relational relational databases sql structured data technology