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在Oracle中,您可以使用MAX函数与GROUP BY子句结合进行分组统计
首先,我们创建一个名为employees的表:
CREATE TABLE employees ( id NUMBER PRIMARY KEY, name VARCHAR2(50), department_id NUMBER, salary NUMBER );
接下来,我们插入一些示例数据:
INSERT INTO employees (id, name, department_id, salary) VALUES (1, 'Alice', 10, 5000); INSERT INTO employees (id, name, department_id, salary) VALUES (2, 'Bob', 10, 6000); INSERT INTO employees (id, name, department_id, salary) VALUES (3, 'Charlie', 20, 7000); INSERT INTO employees (id, name, department_id, salary) VALUES (4, 'David', 20, 8000);
现在,我们将使用MAX函数和GROUP BY子句按部门对员工的最高薪水进行分组统计:
SELECT department_id, MAX(salary) as max_salary FROM employees GROUP BY department_id;
此查询将返回以下结果:
DEPARTMENT_ID MAX_SALARY ------------- ---------- 10 6000 20 8000
这表示部门10的最高薪水是6000,部门20的最高薪水是8000。