sql - 使用不同的求和和减法函数的 Sql 查询

Question

我需要您帮助我从一个表中提取一个查询以进行金融交易及其行如下： Accountnumber ：例如（4568643） Transactionamount ：例如（1000 美元） Kindoftransaction（借方或贷方）交易文件（并且这个号码持有链接到此交易的文件号）

我需要你的帮助来提取每个（交易文件）的净余额的查询，在总和（Transactionamount）从（Kindoftransaction）持有“贷方”并从所有（Transactionamount）持有“借方”的总和中减去它，其中（Accountnumber）是（ 4568643)

Answer 1

这有帮助吗？- 请注意，如果您可以发布您的表格定义，它会有所帮助

DECLARE @transactions TABLE
(
    [AccountNumber] INT NOT NULL,
    [TransactionAmount] DECIMAL(18, 10) NOT NULL,
    [KindOfTransaction] CHAR(1) NOT NULL, -- this could be better served as a boolean / bit field
    [TransactionFile] INT NOT NULL
)

-- dummy data
INSERT INTO @transactions VALUES(4568643, 100, 'C', 123)
INSERT INTO @transactions VALUES(4568643, 150, 'C', 124)
INSERT INTO @transactions VALUES(4568643, 50, 'D', 125)
INSERT INTO @transactions VALUES(2345623, 100, 'C', 126)
INSERT INTO @transactions VALUES(2345623, 79, 'C', 127)

    -- here's the actual query to return your data using a common table expression
;WITH cteAccountSummary (AccountNumber, TotalCredits, TotalDebits) AS (
    SELECT  [AccountNumber], 
            SUM(
                CASE [KindOfTransaction]
                    WHEN 'C' THEN [TransactionAmount]
                    ELSE 0
                END
            ),
            SUM(
                CASE [KindOfTransaction]
                    WHEN 'D' THEN [TransactionAmount]
                    ELSE 0
                END
            )
    FROM @transactions
    GROUP BY [AccountNumber]
)
SELECT [AccountNumber], TotalCredits - TotalDebits AS 'NetFinancialPosition'
FROM cteAccountSummary

Answer 2

select transactionfile, sum(case when kindoftransaction = 'debit' then -1 else 1 end * transactionamount)
from financial
where accountnumber = 4568643
group by transactionfile