Kettle使用_18 分组组件计算百分位数

需求: 通过Kettle的组件对emp的sal字段计算百分之25、50、75、90数。

解决方法：结合表输入、排序记录、分组组件解决，这里主要是通过应用分组组件的Percentile方法来解决。

Previous work:

准备员工emp表结构和数据（mysql）。

create table emp(
    empno int unsigned auto_increment COMMENT '雇员编号',
    ename varchar(15) COMMENT '雇员姓名',
    job varchar(10) COMMENT '雇员职位',
    mgr int unsigned COMMENT '雇员对应的领导的编号',
    hiredate date COMMENT '雇员的雇佣日期',
    sal decimal(7,2) COMMENT '雇员的基本工资',
    comm decimal(7,2) COMMENT '奖金',
    deptno int unsigned COMMENT '所在部门',
    primary key(empno),
    foreign key(deptno) references dept(deptno)
) COMMENT='雇员表';

INSERT INTO emp VALUES    (7369,'SMITH','CLERK',7902,'1980-12-17',800,NULL,20);
INSERT INTO emp VALUES    (7499,'ALLEN','SALESMAN',7698,'1981-2-20',1600,300,30);
INSERT INTO emp VALUES    (7521,'WARD','SALESMAN',7698,'1981-2-22',1250,500,30);
INSERT INTO emp VALUES    (7566,'JONES','MANAGER',7839,'1981-4-2',2975,NULL,20);
INSERT INTO emp VALUES    (7654,'MARTIN','SALESMAN',7698,'1981-9-28',1250,1400,30);
INSERT INTO emp VALUES    (7698,'BLAKE','MANAGER',7839,'1981-5-1',2850,NULL,30);
INSERT INTO emp VALUES    (7782,'CLARK','MANAGER',7839,'1981-6-9',2450,NULL,10);
INSERT INTO emp VALUES    (7788,'SCOTT','ANALYST',7566,'87-7-13',3000,NULL,20);
INSERT INTO emp VALUES    (7839,'KING','PRESIDENT',NULL,'1981-11-17',5000,NULL,10);
INSERT INTO emp VALUES    (7844,'TURNER','SALESMAN',7698,'1981-9-8',1500,0,30);
INSERT INTO emp VALUES    (7876,'ADAMS','CLERK',7788,'87-7-13',1100,NULL,20);
INSERT INTO emp VALUES    (7900,'JAMES','CLERK',7698,'1981-12-3',950,NULL,30);
INSERT INTO emp VALUES    (7902,'FORD','ANALYST',7566,'1981-12-3',3000,NULL,20);
INSERT INTO emp VALUES    (7934,'MILLER','CLERK',7782,'1982-1-23',1300,NULL,10);

Step1：新建个转换

Step2: 拖个表输入组件，（该组件位于转换的输入分类下），配置如下：