基于逗号分隔值的基于和的连接表

Question

我有这么贵的桌子

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​

和班昂桌

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当表成本中的benang.biaya在表benang上有相同的值时，我可以求和( id_benang )吗

所以这样的结果

id_benang biaya

8= 4000000

6= 4000000

       8000000

因为我糟糕的英语

Answer 1

假设你想要在成本信息旁边的benang表的总价值.

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

使用此示例模式和种子数据：

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;