加入两个包含一个 WHERE 子句的 MySQL SELECT 语句答案

【问题标题】：Join two MySQL SELECT statements containing one WHERE clause加入两个包含一个 WHERE 子句的 MySQL SELECT 语句
【发布时间】：2016-03-18 23:33:38
【问题描述】：

如何将下面的两个 select 语句合并为一个语句？我希望结果出现在一张表中。感谢您的帮助。

第一个陈述-

SELECT Account_ID, SUM(Profit_Loss) AS Starting_Balance
FROM client_ledger_history
WHERE Summary = 'Cash In'
GROUP BY Account_ID WITH ROLLUP

第二个陈述 -

SELECT
    client_ig_client_list.Account_ID,
    client_ig_client_list.`Name`,
    Share_Status,
    Forex_Status,
    Index_Status,
    Share_Weighting,
    Forex_Weighting,
    Index_Weighting,
    SUM(
        client_ledger_history.Profit_Loss
    ) AS Current_Balance
FROM
    client_ledger_history
LEFT JOIN client_ig_client_list ON client_ig_client_list.Account_ID = client_ledger_history.Account_ID
GROUP BY
    Account_ID WITH ROLLUP

【问题讨论】：

如果您提供示例数据和所需结果，您的问题会更清楚。

标签： mysql join where-clause

【解决方案1】：

你应该加入一个嵌套表

SELECT
client_ig_client_list.Account_ID,
Starting_Balance,
client_ig_client_list.`Name`,
Share_Status,
Forex_Status,
Index_Status,
Share_Weighting,
Forex_Weighting,
Index_Weighting,
SUM(client_ledger_history.Profit_Loss) AS Current_Balance 
FROM
    client_ledger_history LEFT JOIN client_ig_client_list ON client_ig_client_list.Account_ID = client_ledger_history.Account_ID 
LEFT JOIN 
(SELECT Account_ID, SUM(Profit_Loss) AS Starting_Balance 
FROM client_ledger_history WHERE Summary = 'Cash In' GROUP BY Account_ID WITH ROLLUP) as client_ledger_aggreagated_history 
ON client_ledger_aggreagated_history.Account_ID = client_ledger_history.Account_ID
    GROUP BY Account_ID WITH ROLLUP

【讨论】：

感谢@MrMush，但是当我尝试您的陈述时出现以下错误。 [错误] 1054 - '字段列表'中的未知列'client_ledger_aggreagated_history.Profit_Loss'
糟糕，已修复，请重试。