您还没有给出ClientBank
和Bank
表的结构。我正在你插入的记录是这样的:
INSERT INTO `ClientBank`
(`ClientID`, `FName`, `Lname`)
VALUES
(1, 'Abraham', 'Backman'),
(2, 'Carl', 'Dacosta'),
(3, 'Erwin', 'Fabio'),
(4, 'Gabriel', 'Haddon');
INSERT INTO `Bank`
(`DepositID`, `ClientID`, `Deposit`)
VALUES
(1, 1, 100),
(2, 2, 200),
(3, 3, 300),
(4, 4, 400),
(5, 2, 500),
(6, 3, 600);
你可以得到存款总额为每位客户提供这样的:
SELECT
client.LName, client.FName, SUM(b.Deposit) as Total
FROM
ClientBank client
INNER JOIN
Bank b ON (client.ClientID = b.ClientID)
GROUP By
client.LName, client.FName;
如果只想为特定客户(使用他们的过滤名称比客户Id):
SELECT
client.LName, client.FName, SUM(b.Deposit) as Total
FROM
ClientBank client
INNER JOIN
Bank b ON (client.ClientID = b.ClientID)
WHERE
client.LName = 'Fabio' AND client.FName = 'Erwin'
GROUP By
client.LName, client.FName;
你想要的行数?客户总数*的总和?你从COUNT(b.Total)期待什么? – kums 2014-10-02 04:48:57
我的腰椎疾病,我想总和,这是SUM和不算,但我仍然得到相同的错误 – user3342795 2014-10-02 16:50:33