Sql =''和isnull（a.[payid]，''）=''和isnull（a.[paysubid]，''）=''） 和isnull（b[状态]，“”）=@cat 并且a.stat277_statusId为空 和[csflevel]=@级别 打印“默认值”

您可以在select中使用case语句来覆盖所有条件，而不是在where子句中，例如

select @message = 
   case
     when isnull(a.sourceofpay,'') = @sop
       and isnull(a.[payid],'') = @payid
       and isnull(a.[paysubid],'') = @paysubid
       and isnull(b.[status],'') = @cat 
       and isnull(c.[status],'') = @stat
       and a.[csflevel] = @level then
       'status match - sop, payid and subid override. out value = '
     when ...
     else 'default ''''' end,
  @out = d.billedstat
  from [dbo].[BilledStatusOverride] a
    inner join [dbo].[cat277] b on a.[cat277_statusId] = b.[COUNTER]
    left outer join [dbo].[stat277] c on a.[stat277_statusId] = c.[COUNTER]
    inner join [dbo].[bsname] d on a.[bsname_statId] = d.[counter] 

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显然要取代。。。使用其他测试条件。它仍然不是特别好，但至少它只是一条SQL语句。

你确定你在使用MySQL吗？这看起来更像MS SQL Server代码。

select @message = 
   case
     when isnull(a.sourceofpay,'') = @sop
       and isnull(a.[payid],'') = @payid
       and isnull(a.[paysubid],'') = @paysubid
       and isnull(b.[status],'') = @cat 
       and isnull(c.[status],'') = @stat
       and a.[csflevel] = @level then
       'status match - sop, payid and subid override. out value = '
     when ...
     else 'default ''''' end,
  @out = d.billedstat
  from [dbo].[BilledStatusOverride] a
    inner join [dbo].[cat277] b on a.[cat277_statusId] = b.[COUNTER]
    left outer join [dbo].[stat277] c on a.[stat277_statusId] = c.[COUNTER]
    inner join [dbo].[bsname] d on a.[bsname_statId] = d.[counter]