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在MYSQL中聲明局部變量時出現異常。請建議我如何解決問題。在使用C#在MYSQL中聲明局部變量時發生致命錯誤
異常:
執行命令時遇到致命錯誤。
的InnerException:
{"Parameter '@OrderofParent' must be defined."}
代碼片段:
StringBuilder sbQuery = new StringBuilder(); <br>
sbQuery.Append(@"Declare @OrderofParent INT; SET @OrderofParent = 0;
select top 1 @OrderofParent = OrderofParent from Filter group by OrderofParent order by OrderofParent desc;
select 'FamilyType' as Mode, 0 as Id, 'Complexity Type' as FilterName, null as FilterCreatedDate, 0 as IsDisabled,0 as ParentId, @OrderofParent as OrderofParent,1 as TagDisplay, 0 as ParentCount from I_FamilyTypePrice
union
Select 'Filter', Id, FilterName, FilterCreatedDate, IsDisabled, f.ParentId, OrderofParent, TagDisplay, 0 from Filter f where f.ParentID = 0
union
select 'FamilyType', ft.Id, FamilyTypeName, CreatedDate, 0,0, @OrderofParent,0, count(complexityType) from I_FamilyTypePrice ft join Family f on f.complexityType = ft.Id where version = @version and IsActive = 1 and Uploaded = 1; ");
哪裏的實際調用MySQL的代碼? – dbugger