连接查询

Question

BizTable

ID          From Store      To Store        Quantity
01020405    401              402             5
01020405    499              406             6
01020405    401              418             15
01020405    403              402             10
01020405    402              403             20
01020405    402              406             10
01020405    406              403             2

我的目标是编写一个查询，显示每个PART的每个PART的概要数量从上面的BizTable中的每个PART和连接存储它在字符串中的TO，如下表所示

ID          Store_OUT           SUM_Quantity      
01020405    401 -  402,418          20
01020405    402 -  403,406          30

Answer 1

 SELECT id, CONCAT(FROM_store,' - ',`to_store`) AS store_out, 
 SUM(quantity) AS sum_quantity  
 FROM biztable 
 GROUP BY id , from_store, to_store
 ORDER BY id , from_store, to_store;

Answer 2

谢谢@ J.Zend。

我错过了to_store专栏。这是正确的查询：

 SELECT id, CONCAT(FROM_store,' - ',`to_store`) AS store_out, 
        SUM(quantity) AS sum_quantity  
 FROM biztable 
 GROUP BY id , from_store, to_store
 ORDER BY id , from_store, to_store;

有一个问题。 WHS-OUT列未在连接结果中添加所有to_stores，如示例所示。此查询仅使用一个商店。

Answer 3

表架构

CREATE TABLE TESTXML
(
ID VARCHAR(20),
FromStore  VARCHAR(20),
ToStore  VARCHAR(20),
Quantity INT
)
INSERT INTO TESTXML
VALUES( '01020405','401','402',5),
( '01020405','499','406',6),
( '01020405','401','418',15),
( '01020405','403','402',10),
( '01020405','402','403',20),
( '01020405','402','406',10),
( '01020405','406','403',2)

现在试试这个

;WITH CTE AS
(
    SELECT 
    ID,
    FromStore,
    ToStore,
    STORE_OUT = 
    (
        SELECT [text()] = A.ToStore + ','
        FROM TestXml A
        WHERE A.FromStore = B.FromStore
        ORDER BY A.ToStore
        FOR XML PATH('')
    )
    FROM TestXml B
) 
,BTE AS
(
    SELECT X.ID, X.FromStore, X.FromStore+' - '+X.STORE_OUT AS STORE_OUT , Y.Quantity 
    FROM CTE X
    JOIN TestXml Y ON X.ID = Y.ID AND X.FromStore = Y.FromStore AND X.ToStore = Y.ToStore
)
SELECT ID, LEFT(STORE_OUT, (LEN(STORE_OUT) - 1)) AS Store_Out, SUM(Quantity) AS  SUM_Quantity
FROM BTE
GROUP BY ID, STORE_OUT

您将获得以下结果

ID          Store_Out       Sum_Quantity
01020405    401 - 402,418   20
01020405    402 - 403,406   30
01020405    403 - 402       10
01020405    406 - 403       2
01020405    499 - 406       6