總和不同的行內部加入sqlite android

Question

我的問題：我有3個表，用戶，借方和user_list。 我需要一個查詢（因為我在android上使用游標），最好不要使用rawQuery來獲取user.name和狀態為1的所有與該用戶鏈接的借方之和。

例如：

User                      Debit                          User_List

id   |  name              user_id    |   value        user_id    |    status

1    | John               1          | 10.23           1                1
2    | Marie              1          | 22              2                1
                          2          | 2333

當狀態等於1時，它應該返回如下所示的內容：

name     value

John     32.23
Marie    2333

到目前為止，我所做的是：

SELECT (select SUM(debit_value) from debits where debit_status = 0) AS user_balance, user_name AS user_name, status, users.user_id AS user_id, _id FROM users INNER JOIN users_listview ON users.user_id = users_listview.user_id WHERE (status = ?) GROUP BY users._user_id

謝謝 ！

Answer 1

使用以下查詢

select User.name, sum(Value) from User inner join Debit
on User.id=Debit.userid
Group by User.name

Answer 2

嘗試這個，

SELECT U.NAME,SUM(COALESCE(D.VALUE,0)) AS TOTAL_VALUE FROM USER U LEFT OUTER JOIN  DEBIT D ON U.ID=D.USER_ID GROUP BY U.NAME

Answer 3

我的最終查詢：

SELECT SUM(debit_value) AS user_balance, user_name AS user_name, status, users.user_id AS user_id, users.user_id AS _id FROM users INNER JOIN users_listview ON users.user_id = users_listview.user_id INNER JOIN debits ON users.user_id = debit_to WHERE (status = ?) GROUP BY debit_to

謝謝你們 ！