Code-StandUp: Oracle PL/SQL做 "累加彙總" and "累加平均"

方式如下 :

全部累加彙總語法


SELECT ...
    , Sum( column1 ) Over( Order by column2 ) as alias
 FROM ...

分類累加彙總語法


SELECT ...
    , Sum( column1 ) Over( partition by column2 Order by column3 ) as alias
 FROM ...

範例

-- 建立 Temp Table
CREATE TABLE TOM_TEST (
 EMPLOYEE_ID NUMBER
, DEPT_ID     NUMBER
, MONEY       NUMBER
);

-- 新增 Temp Data
INSERT INTO TOM_TEST VALUES( 1, 100, 10000 );
INSERT INTO TOM_TEST VALUES( 2, 100, 15000 );
INSERT INTO TOM_TEST VALUES( 3, 100, 20000 );
INSERT INTO TOM_TEST VALUES( 4, 200, 32000 );
INSERT INTO TOM_TEST VALUES( 5, 200, 40000 );
INSERT INTO TOM_TEST VALUES( 6, 200, 35000 );
INSERT INTO TOM_TEST VALUES( 7, 300, 30000 );
INSERT INTO TOM_TEST VALUES( 8, 300, 25000 );
INSERT INTO TOM_TEST VALUES( 9, 300, 10000 );
COMMIT;

-- 按 EMPLOYEE_ID 進行 MONEY 全部累加彙總
select EMPLOYEE_ID
    , DEPT_ID
    , MONEY
    , sum(MONEY) over(order by EMPLOYEE_ID) as SUM
 from TOM_TEST;


-- 以 DEPT_ID 分類, 按 EMPLOYEE_ID 進行 MONEY 分類累加彙總
select EMPLOYEE_ID
    , DEPT_ID
    , MONEY
    , sum(MONEY) over(partition by DEPT_ID order by EMPLOYEE_ID) as SUM
 from TOM_TEST;


-- 按 EMPLOYEE_ID 進行 MONEY 全部累加平均
select EMPLOYEE_ID
    , DEPT_ID
    , MONEY
    , avg(MONEY) over(order by EMPLOYEE_ID) as AVG
 from TOM_TEST;


-- 以 DEPT_ID 分類, 按 EMPLOYEE_ID 進行 MONEY 分類累加平均
select EMPLOYEE_ID
    , DEPT_ID
    , MONEY
    , avg(MONEY) over(partition by DEPT_ID order by EMPLOYEE_ID) as AVG
 from TOM_TEST;


-- 刪除 Temp Table
DROP TABLE TOM_TEST;