mysql - 基于逗号分隔值的基于总和的连接表

Question

我的餐 table 费用是这样的

和表 benan

当cost表中的id_benang与benang表中的值相同时，我可以求和(benang.biaya)吗

所以结果是这样的

id_benang biaya

8 = 4000000

6 = 4000000

       8000000

抱歉我的英语不好

Answer 1

假设您想要成本信息旁边的 benan 表中的总值(value)...

SELECT kain, id_cuci, cost_id_benang, SUM(biaya)
FROM
(
    SELECT b.id_benang, biaya, c.kain, c.id_cuci, c.id_benang as cost_id_benang
    FROM BENANG b
    INNER JOIN 
    COST c
    ON LOCATE( RTRIM(CAST(b.id_benang AS CHAR(10))),c.id_benang) > 0
)AS seperatedData
GROUP BY kain, id_cuci, cost_id_benang

使用此示例架构和种子数据:

CREATE TABLE COST (kain int, id_benang varchar(10), id_cuci int);
CREATE TABLE BENANG (id_benang int, biaya int);

INSERT INTO COST (kain, id_benang, id_cuci)
VALUES(8,'8,6', 3);

INSERT INTO BENANG(id_benang, biaya)
SELECT 5,3000000 UNION ALL
SELECT 6,4000000 UNION ALL
SELECT 7,3000000 UNION ALL
SELECT 8,4000000;