使用Impala进行数据的复杂聚合和分组操作可以通过编写SQL查询来实现。以下是一些示例操作：
SELECT department, AVG(salary) as avg_salary, SUM(salary) as total_salary
FROM employee
GROUP BY department;
SELECT department, COUNT(*) as num_employees, SUM(salary) as total_salary
FROM employee
GROUP BY department;
SELECT department, AVG(salary) as avg_salary
FROM employee
GROUP BY department
ORDER BY avg_salary DESC
LIMIT 1;
通过编写类似上述示例的SQL查询，可以使用Impala进行数据的复杂聚合和分组操作。Impala提供了高性能的并行查询处理能力，可以有效处理大规模数据集的聚合和分组操作。
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