Aggregate functions in Oracle Database are special functions that process a set of values and return a single summary value. They are crucial for data analysis, allowing users to derive meaningful insights from large datasets. By performing operations such as summation, averaging, and counting, these functions simplify complex data into understandable summaries. This is particularly useful in reporting and business intelligence, where decision-makers need concise information. Aggregate functions operate on multiple rows and can help identify trends, patterns, and outliers. They are often used in conjunction with the GROUP BY clause to categorize data before summarization. This capability makes aggregate functions integral to relational database management and SQL queries, serving various analytical purposes across industries.
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