用零替换负值的问题

Question

检查了类似的线程，但其他用户未遇到类似的问题。

该代码似乎无法正常工作，并且错误消息显示“第11行出现意外的令牌'Then'”。

第6行到第8行获得确定节省量的计算列，但如果是损失，则变为负数。我想使用Case用0替换所有负值，但由于某种原因'then'被视为错误。

Select Distinct Reports.rptviewGovtTransparencyCode.project_title As Title,
  Reports.rptviewContract.AwardedDateTime As Awarded,
  Reports.rptviewContract.estimated_value As Budget,
  Convert(decimal,Replace(Reports.rptviewCustomFieldAnswer.Answer, ',',
  '')) As Value,
  Reports.rptviewContract.estimated_value -
  Convert(decimal,Replace(Reports.rptviewCustomFieldAnswer.Answer, ',',
  '')) As Saving,
  case when (Reports.rptviewContract.estimated_value -
  Convert(decimal,Replace(Reports.rptviewCustomFieldAnswer.Answer, ',', ''))
  <= 0 then 0) As Saving2
From Reports.rptviewGovtTransparencyCode
  Inner Join Reports.rptviewContract On Reports.rptviewContract.contract_id =
    Reports.rptviewGovtTransparencyCode.contract_id
  Inner Join Reports.rptviewCustomField On Reports.rptviewCustomField.OrgId =
    Reports.rptviewContract.OrgId
  Inner Join Reports.rptviewCustomFieldAnswer
    On Reports.rptviewCustomFieldAnswer.TargetAreaId =
    Reports.rptviewContract.project_id And Reports.rptviewCustomField.Id =
    Reports.rptviewCustomFieldAnswer.CustomFieldId
  Inner Join Reports.rptviewContractPrimaryContact
    On Reports.rptviewContract.contract_id =
    Reports.rptviewContractPrimaryContact.ContractId
Where Reports.rptviewGovtTransparencyCode.department = '1capital' And
  Reports.rptviewCustomField.Title = 'awarded value'

Answer 1

此：

case when (Reports.rptviewContract.estimated_value -
  Convert(decimal,Replace(Reports.rptviewCustomFieldAnswer.Answer, ',', ''))
  <= 0 then 0)

遗漏了案件的结尾，并且在when子句之后也有一个错误的括号对，将对号和“ then”括起来。将其替换为以下内容：

case when Reports.rptviewContract.estimated_value -
  Convert(decimal,Replace(Reports.rptviewCustomFieldAnswer.Answer, ',', ''))
  <= 0 then 0 end

为了更好地演示，您之前曾拥有过：

case when (condition then result)

正确的是

case when condition then result end

您不应在括号内隐藏“ then”：“何时”看不到。