SQL窗口函数的使用方法(2)-木庄网络博客

示例表和脚本
--员工信息表
CREATE TABLE employee
    ( emp_id    NUMBER
    , emp_name  VARCHAR2(50) NOT NULL
    , sex       VARCHAR2(10) NOT NULL
    , dept_id   INTEGER NOT NULL
    , manager   INTEGER
    , hire_date DATE NOT NULL
    , job_id    INTEGER NOT NULL
    , salary    NUMERIC(8,2) NOT NULL
    , bonus     NUMERIC(8,2)
    , email     VARCHAR2(100) NOT NULL
  , comments  VARCHAR2(500)
  , create_by VARCHAR2(50) NOT NULL
  , create_ts TIMESTAMP NOT NULL
  , update_by VARCHAR2(50) 
  , update_ts TIMESTAMP
    ) ;
COMMENT ON TABLE employee IS '员工信息表';
COMMENT ON COLUMN employee.emp_id IS '员工编号，自增主键';
COMMENT ON COLUMN employee.emp_name IS '员工姓名';
COMMENT ON COLUMN employee.sex IS '性别';
COMMENT ON COLUMN employee.dept_id IS '部门编号';
COMMENT ON COLUMN employee.manager IS '上级经理';
COMMENT ON COLUMN employee.hire_date IS '入职日期';
COMMENT ON COLUMN employee.job_id IS '职位编号';
COMMENT ON COLUMN employee.salary IS '月薪';
COMMENT ON COLUMN employee.bonus IS '年终奖金';
COMMENT ON COLUMN employee.email IS '电子邮箱';
COMMENT ON COLUMN employee.comments IS '备注信息';
COMMENT ON COLUMN employee.create_by IS '创建者';
COMMENT ON COLUMN employee.create_ts IS '创建时间';
COMMENT ON COLUMN employee.update_by IS '修改者';
COMMENT ON COLUMN employee.update_ts IS '修改时间';
 
 
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (1,'刘备', '男', 1, NULL, DATE '2000-01-01', 1, 30000, 10000, 'liubei@shuguo.com', NULL, 'Admin', TIMESTAMP '2000-01-01 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (2,'关羽', '男', 1, 1, DATE '2000-01-01', 2, 26000, 10000, 'guanyu@shuguo.com', NULL, 'Admin', TIMESTAMP '2000-01-01 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (3,'张飞', '男', 1, 1, DATE '2000-01-01', 2, 24000, 10000, 'zhangfei@shuguo.com', NULL, 'Admin', TIMESTAMP '2000-01-01 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (4,'诸葛亮', '男', 2, 1, DATE '2006-03-15', 3, 24000, 8000, 'zhugeliang@shuguo.com', NULL, 'Admin', TIMESTAMP '2006-03-15 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (5,'黄忠', '男', 2, 4, DATE '2008-10-25', 4, 8000, NULL, 'huangzhong@shuguo.com', NULL, 'Admin', TIMESTAMP '2008-10-25 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (6,'魏延', '男', 2, 4, DATE '2007-04-01', 4, 7500, NULL, 'weiyan@shuguo.com', NULL, 'Admin', TIMESTAMP '2007-04-01 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (7,'孙尚香', '女', 3, 1, DATE '2002-08-08', 5, 12000, 5000, 'sunshangxiang@shuguo.com', NULL, 'Admin', TIMESTAMP '2002-08-08 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (8,'孙丫鬟', '女', 3, 7, DATE '2002-08-08', 6, 6000, NULL, 'sunyahuan@shuguo.com', NULL, 'Admin', TIMESTAMP '2002-08-08 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (9,'赵云', '男', 4, 1, DATE '2005-12-19', 7, 15000, 6000, 'zhaoyun@shuguo.com', NULL, 'Admin', TIMESTAMP '2005-12-19 10:00:00', 'Admin', TIMESTAMP '2006-12-31 10:00:00');
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (10,'廖化', '男', 4, 9, DATE '2009-02-17', 8, 6500, NULL, 'liaohua@shuguo.com', NULL, 'Admin', TIMESTAMP '2009-02-17 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (11,'关平', '男', 4, 9, DATE '2011-07-24', 8, 6800, NULL, 'guanping@shuguo.com', NULL, 'Admin', TIMESTAMP '2011-07-24 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (12,'赵氏', '女', 4, 9, DATE '2011-11-10', 8, 6600, NULL, 'zhaoshi@shuguo.com', NULL, 'Admin', TIMESTAMP '2011-11-10 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (13,'关兴', '男', 4, 9, DATE '2011-07-30', 8, 7000, NULL, 'guanxing@shuguo.com', NULL, 'Admin', TIMESTAMP '2011-07-30 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (14,'张苞', '男', 4, 9, DATE '2012-05-31', 8, 6500, NULL, 'zhangbao@shuguo.com', NULL, 'Admin', TIMESTAMP '2012-05-31 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (15,'赵统', '男', 4, 9, DATE '2012-05-03', 8, 6000, NULL, 'zhaotong@shuguo.com', NULL, 'Admin', TIMESTAMP '2012-05-03 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (16,'周仓', '男', 4, 9, DATE '2010-02-20', 8, 8000, NULL, 'zhoucang@shuguo.com', NULL, 'Admin', TIMESTAMP '2010-02-20 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (17,'马岱', '男', 4, 9, DATE '2014-09-16', 8, 5800, NULL, 'madai@shuguo.com', NULL, 'Admin', TIMESTAMP '2014-09-16 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (18,'法正', '男', 5, 2, DATE '2017-04-09', 9, 10000, 5000, 'fazheng@shuguo.com', NULL, 'Admin', TIMESTAMP '2017-04-09 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (19,'庞统', '男', 5, 18, DATE '2017-06-06', 10, 4100, 2000, 'pangtong@shuguo.com', NULL, 'Admin', TIMESTAMP '2017-06-06 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (20,'蒋琬', '男', 5, 18, DATE '2018-01-28', 10, 4000, 1500, 'jiangwan@shuguo.com', NULL, 'Admin', TIMESTAMP '2018-01-28 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (21,'黄权', '男', 5, 18, DATE '2018-03-14', 10, 4200, NULL, 'huangquan@shuguo.com', NULL, 'Admin', TIMESTAMP '2018-03-14 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (22,'糜竺', '男', 5, 18, DATE '2018-03-27', 10, 4300, NULL, 'mizhu@shuguo.com', NULL, 'Admin', TIMESTAMP '2018-03-27 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (23,'邓芝', '男', 5, 18, DATE '2018-11-11', 10, 4000, NULL, 'dengzhi@shuguo.com', NULL, 'Admin', TIMESTAMP '2018-11-11 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (24,'简雍', '男', 5, 18, DATE '2019-05-11', 10, 4800, NULL, 'jianyong@shuguo.com', NULL, 'Admin', TIMESTAMP '2019-05-11 10:00:00', NULL, NULL);
INSERT INTO employee(EMP_ID,emp_name, sex, dept_id, manager, hire_date, job_id, salary, bonus, email, comments, create_by, create_ts, update_by, update_ts) VALUES (25,'孙乾', '男', 5, 18, DATE '2018-10-09', 10, 4700, NULL, 'sunqian@shuguo.com', NULL, 'Admin', TIMESTAMP '2018-10-09 10:00:00', NULL, NULL);
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