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A 3.3.4 SQL Aggregate Functions (HL Only)

SQL aggregate functions (AVG, COUNT, MAX, MIN, SUM) perform calculations on grouped data for reporting and decision-making within a database. (HL only) In many real-world scenarios, you won't just need to retrieve individual records from a database. The most valuable information often comes from analysing trends, summarising data, and performing calculations across multiple records with certain characteristics. This...

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