Aggregate functions in SQL are used to perform calculations on multiple rows of a table and return a single summarized value. They are mainly used to analyze and summarize data in databases. 🔹 Types ...

Task 4: Aggregate Functions and Grouping – SQL Developer Internship Objective This task demonstrates the use of aggregate functions and grouping to summarize and analyze hospital data from the ...

SQL is, sadly, kicking my ass today. quiz: id descr ===== 1 FooQuiz question: id quizid descr response ===== 1 1 Foo [A,B] 2 1 Foo [A,B] quiz_attempt: id quizid userid ===== 1 1 1 2 1 2 ...