Question

我有2个表，evouchers，pos_vendor_map。 pos_vendor_map表有POS_ID列表。 evouchers将具有多个事务，并且可以具有相同的POS_ID。

pos_vendor_map：

ID  POS_ID     VendorName
1   1          Test1
2   2          Test2

电子奖券：

ID  TRANS_TYPE  TRANS_AMOUNT TRANS_STATUS POS_ID
1   1           2000         1            1
2   1           3000         1            1
3   1           1000         1            2
4   1           5000         1            2

现在我想从evouchers表中获取每个POS_ID的事务总和。所以它会像

foreach(POS_ID)
{
SUM(TRANS_AMOUNT)
}

目前我正在获得结果，但是通过在查询中提供POS_ID，我希望它是动态的，比如检查POS_ID的总数，然后为每次运行此查询。

SELECT
    (SUM(IF(ev.TRANS_TYPE='1', ev.TRANS_AMOUNT,0)) - SUM(IF(ev.TRANS_TYPE='2', ev.TRANS_AMOUNT,0))) AS CreditStatus,
    (select  pvm.VENDOR_NAME from pos_vendor_map pvm  where pvm.POS_ID = ev.POS_ID) AS VendorName
FROM
    evouchers ev
WHERE
    ev.POS_ID='1' and ev.TRANS_STATUS='1';

由于

Answer 1

您的查询应该如下所示：

SELECT SUM(CASE WHEN ev.TRANS_TYPE = 1 THEN ev.TRANS_AMOUNT
                WHEN ev.TRANS_TYPE = 2 THEN -ev.TRANS_AMOUNT
                ELSE 0
           END) as CreditStatus
      -- pvm.VENDOR_NAME 
FROM evouchers ev JOIN
     pos_vendor_map pvm
     ON pvm.POS_ID = ev.POS_ID;

如果你想要每POS_ID行一行，那么：

SELECT SUM(CASE WHEN ev.TRANS_TYPE = 1 THEN ev.TRANS_AMOUNT
                WHEN ev.TRANS_TYPE = 2 THEN -ev.TRANS_AMOUNT
                ELSE 0
           END) as CreditStatus,
       pvm.VENDOR_NAME 
FROM evouchers ev JOIN
     pos_vendor_map pvm
     ON pvm.POS_ID = ev.POS_ID
GROUP BY ev.POS_ID, pvm.VENDOR_NAME

Answer 2

您可以从此查询中找到总和

exec sp_helptext 'fn_listextendedproperty'

Answer 3

如果你想累积总和，你可以尝试这样的事情：

 SELECT C.VendorName
 ,A.*
, @r:= CASE WHEN @g=A.POS_ID THEN 
            CASE WHEN A.TRANS_TYPE=1 THEN @r+A.TRANS_AMOUNT WHEN A.TRANS_TYPE=2 THEN @r-A.TRANS_AMOUNT ELSE 0 END
       ELSE A.TRANS_AMOUNT END AS AMOUNT
, @g:=A.POS_ID g
FROM EVOUCHER A
CROSS JOIN (SELECT @r:=0 , @g:=0) B 
INNER JOIN POS_VENDOR C ON A.POS_ID = C.POS_ID
ORDER BY A.POS_ID, A.ID;

输出：

VendorName  id  trans_type  trans_amount    trans_status    pos_id  AMOUNT  g
Test1   1   1   2000    1   1   2000    1
Test1   2   1   3000    1   1   5000    1
Test1   5   2   1000    1   1   1000    1
Test2   3   1   1000    1   2   1000    2
Test2   4   1   5000    1   2   6000    2
Test2   6   2   500 1   2   500 2

示例数据：

CREATE TABLE EVOUCHER(id int, trans_type int, trans_amount int, trans_status int, pos_id int);
INSERT INTO EVOUCHER VALUES (1,1,2000,1,1);
INSERT INTO EVOUCHER VALUES (2,1,3000,1,1);
INSERT INTO EVOUCHER VALUES (3,1,1000,1,2);
INSERT INTO EVOUCHER VALUES (4,1,5000,1,2);
INSERT INTO EVOUCHER VALUES (5,2,1000,1,1);
INSERT INTO EVOUCHER VALUES (6,2,500,1,2);
CREATE TABLE POS_VENDOR (id int, pos_id int, VendorName VARCHAR(20));
INSERT INTO POS_VENDOR VALUES (1,1,'Test1');
INSERT INTO POS_VENDOR VALUES (2,2,'Test2');

根据另一个表中的值运行查询

3 个答案: