查询错误。缺少括号

Question

我有以下用于

的SQL查询

SELECT ac.Source_and, 
    ac.Location_spending, 
    ac.type, 
    Sum( ac.balance ) - 
        coalesce( (SELECT Sum( ac.balance ) 
                   FROM Account ac cost
                   WHERE (ac.type = 0)
                   and (cost.Creditor_Account = income.Location_spending)
                   GROUP BY ac.Source , ac.Creditor_Account, ac.type)
                ,0)     
FROM Account ac income
WHERE ac.type = 1
GROUP BY ac.Source_and , ac.Location_spending, ac.type

但它返回以下异常：

  

[88,88]子表达式中缺少右括号   [88,88] COALESCE表达式中缺少右括号   [217,315]查询包含格式错误的结尾。

它出了什么问题？