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What is Understanding SQL Aggregate Functions about?
Aggregate functions are used to perform calculations on column values from a SELECT statement. Common aggregate functions include MIN, MAX, SUM, AVG, and COUNT, which return the minimum value, maximum value, sum, average, and count of rows in a column. The GROUP BY clause groups rows together based on columns, allowing aggregate functions to operate on grouped data. The HAVING clause defines conditions on groups, and the COMPUTE clause calculates summary values displayed as additional rows.
- Author
- Heero Yuy
- Language
- EN