帶SELECT，LEFT JOIN和WHERE子句的算術運算符

-2

我需要幫助。我有下面的代碼工作正常，但沒有達到我的目標。我想要在減法之前的每一個計算值的列「account_title」，它應該最終給我減去值的差異。感謝預期。帶SELECT，LEFT JOIN和WHERE子句的算術運算符

SELECT 
(
    SELECT SUM(amount) 
    FROM mainaccount_a_2017 
    LEFT JOIN chart_of_account ON (chart_of_account.joint_account_numbers = mainaccount_a_2017.joint_account_number) 
    LEFT JOIN asset_liability_income_expenditure_tbl ON (asset_liability_income_expenditure_tbl.a_l_code = chart_of_account.account_type) 
    WHERE a_l_code = 'FA' AND dr_cr_action = 'DR' 
) 
- 
(
    SELECT SUM(amount) 
    FROM mainaccount_b_2017 
    LEFT JOIN chart_of_account ON (chart_of_account.joint_account_numbers = mainaccount_b_2017.joint_account_number) 
    LEFT JOIN asset_liability_income_expenditure_tbl ON (asset_liability_income_expenditure_tbl.a_l_code = chart_of_account.account_type) 
    WHERE a_l_code = 'FA' AND dr_cr_action = 'CR' 
)

來源

2017-02-22 Aderogba Otunla

爲什麼你默默的看着我們？在這裏不適合在全部大寫中輸入你的問題。它使文本更難閱讀，這是粗魯的，它不會幫助你更快。查看主頁面的問題列表 - 您除了您的所有CAPS外還看到了多少個問題？答案：沒有，因爲這樣做不合適。請住手。 –

帳戶標題從哪裏來？您沒有按帳戶對查詢進行分組。 – Barmar

請參閱http://meta.stackoverflow.com/questions/333952/why-should-i-provide-an-mcve-for-what-seems-to-me-to-be-a-very-simple-sql-查詢 – Strawberry

將子查詢更改爲account_title，然後加入它們。

SELECT debits.account_title, debits.total - credits.total AS net_reduction 
FROM (
    SELECT mainaccount_a_2017.account_title, SUM(amount) AS total 
    FROM mainaccount_a_2017 
    LEFT JOIN chart_of_account ON (chart_of_account.joint_account_numbers = mainaccount_a_2017.joint_account_number) 
    LEFT JOIN asset_liability_income_expenditure_tbl ON (asset_liability_income_expenditure_tbl.a_l_code = chart_of_account.account_type) 
    WHERE a_l_code = 'FA' AND dr_cr_action = 'DR' 
    GROUP BY mainaccount_a_2017.account_title 
) AS debits 
JOIN (
    SELECT mainaccount_b_2017.account_title, SUM(amount) AS total 
    FROM mainaccount_b_2017 
    LEFT JOIN chart_of_account ON (chart_of_account.joint_account_numbers = mainaccount_b_2017.joint_account_number) 
    LEFT JOIN asset_liability_income_expenditure_tbl ON (asset_liability_income_expenditure_tbl.a_l_code = chart_of_account.account_type) 
    WHERE a_l_code = 'FA' AND dr_cr_action = 'CR' 
    GROUP BY mainaccount_b_2017.account_title 
) AS credits ON debits.account_title = credits.account_title

DEMO

來源

2017-02-22 23:48:05 Barmar

謝謝你，但我得到了關於歧義的錯誤消息'＃1052 - 字段列表中的列'account_title'含糊不清。我連接了account_title並翻轉了一些東西。我想，你做的非常接近，我可以感覺到，但我還沒有... –

這意味着你在其他表中有'account_title'，所以你需要表前綴。我已經更新了答案來展示這一點。 – Barmar

如果您在其他表格中擁有帳戶標題，那是錯誤的標準化。它應該只在帳戶列表中。 – Barmar

帶SELECT，LEFT JOIN和WHERE子句的算術運算符

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