Structured Query Language
E. F. Codd’s paper that defined relational algebra served as the basis for SQL. SQL is unlike any other coding language you will ever use because it is one of only a handful of languages that use a declarative paradigm. Most languages you use, including Python, use an imperative paradigm. In short, the language serves as a syntactical framework to give a computer instructions on what you want it to do. You are basically a micro-manager. You specify every input, every output and every step the program will take during the processing that happens to get the input to the output. You must be meticulous, as the computer will take you literally. If you leave out even a single detail, you are setting things up to malfunction.
Declarative programming, on the other hand, entails merely specifying the output you want from an implicit input. You have little to no control over the operations performed to derive the output from the input. Consider this SQL statement...