应公司业务要求，需要对数据进行分组汇总做辅助列进行查询
所以使用到了sum(col1) over(partition by col2 order by col3)函数，为了学习与提高在此进行记录。
1、准备数据源
CREATE TABLE TEST01 (NAME VARCHAR(20),DEP_NO VARCHAR(10),SALARY NUMBER(20,2) );
2、插入数据
INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('张三','0010',12000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('李四','0010',12500);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('王五','0020',13000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('赵六','0020',11000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('田七','0020',10000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('如花','0030',8000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('阿卡','0030',9000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('似玉','0030',9500);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('撒人','0030',8800);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('三忍','0030',6000);INSERT INTO TEST01(NAME,DEP_NO,SALARY) VALUES('三舞','0030',6600);
3、进行查询
SELECT T.NAME,T.SALARY,T.DEP_NO,SUM(T.SALARY) OVER(PARTITION BY T.DEP_NO ORDER BY T.NAME)FROM TEST01 T;
查询结果如下图：
这里对DEP_NO进行分组，根据NAME进行排序，然后统计每组递增汇总结果！
