运行以下查询时出现“除以零错误”错误

Question

我在尝试运行此查询时不确定该错误。它给了我除以零错误。此错误发生在第 1 行。

Msg 8134, Level 16, State 1, Line 1
Divide by zero error encountered.

有人可以帮忙吗？

SELECT temp1.*,90  as Plan_val,max(cast(Round(temp2.actual,0) as int))  as actual_val FROM(
SELECT t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id FROM (
SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)],[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id
FROM TEMP_TICKET_STATE

UNION

SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)],[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id
FROM TEMP_TICKET_STATE
where  [Problem_Type_Name(Parent)]='Incident (Technical Issues)'  and PRIORITY_TYPE_NAME  in ('High') AND (ISNULL([Escalated to Closed time],0) <= 120 or ISNULL([Escalated to Resolved time],0) <=120)) t

group by t.[Problem_Type_Name(Parent)] ,t.[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id) temp1

INNER JOIN

(
SELECT t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)],0 AS plan_val, cast(Round((cast(sum(t.Total_tickets) as decimal(38,2))- cast(sum(t.Alarm_Val) as decimal(38,2)))/cast(sum(t.Total_tickets) as decimal(38,2))*100,0) as int) as actual  FROM (
SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)],0 as Alarm_Val, cast (count(distinct [Job_ticket_id])/4 as int) as Total_tickets 
FROM TEMP_TICKET_STATE_month
group by [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)] 

UNION

SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)],cast (count(distinct [Job_ticket_id])/4 as int) as Alarm_Val, 0 as Total_tickets 
FROM TEMP_TICKET_STATE_month
where  [Problem_Type_Name(Parent)]='Incident (Technical Issues)'  and PRIORITY_TYPE_NAME  in ('High') AND (ISNULL([Escalated to Closed time],0) <= 120 or ISNULL([Escalated to Resolved time],0) <=120)
group by [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)] ) t

group by t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)]) temp2

ON temp1.[Problem_Type_Name(Parent)]=temp2.[Problem_Type_Name(Parent)]
Group by temp1.[Assigned Tech],temp1.Close_Date,temp1.Job_ticket_id,temp1.NAME,temp1.[Problem_Type_Name(Parent)],temp1.[Problem_Type_Name(Child)] ,temp1.Report_Date

GO

Answer 1

据我所知，只有一个分母可以为零。其他的似乎是一个常数 4。

NullIf() 是一种用于捕获可怕的除以零 的简单技术。

例如 NullIf(<any denominator>,0) 如果分母 = 0，则返回 NULL

所以在你的情况下：

NullIf(cast(sum(t.Total_tickets) as decimal(38,2)),0)

Answer 2

只有一个商可能失败 - 查询中有 3 个除法，还有 2 个除以常数。试试这个：

SELECT temp1.*,90  as Plan_val,max(cast(Round(temp2.actual,0) as int))  as actual_val FROM(
SELECT t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id FROM (
SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)],[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id
FROM TEMP_TICKET_STATE

UNION

SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)],[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id
FROM TEMP_TICKET_STATE
where  [Problem_Type_Name(Parent)]='Incident (Technical Issues)'  and PRIORITY_TYPE_NAME  in ('High') AND (ISNULL([Escalated to Closed time],0) <= 120 or ISNULL([Escalated to Resolved time],0) <=120)) t

group by t.[Problem_Type_Name(Parent)] ,t.[Problem_Type_Name(Child)] , REPORT_DATE, CLOSE_DATE,[Assigned Tech],NAME , Job_ticket_id) temp1

INNER JOIN

(
SELECT t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)],0 AS plan_val, 
    -- CHANGE IS THE CASE ON THE NEXT LINE!
    case when sum(t.Total_tickets) = 0 then null else cast(Round((cast(sum(t.Total_tickets) as decimal(38,2))- cast(sum(t.Alarm_Val) as decimal(38,2)))/cast(sum(t.Total_tickets) as decimal(38,2))*100,0) as int) end as actual  FROM (
SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)],0 as Alarm_Val, cast (count(distinct [Job_ticket_id])/4 as int) as Total_tickets 
FROM TEMP_TICKET_STATE_month
group by [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)] 

UNION

SELECT 'NOC Incident Resolution - High' as [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)],cast (count(distinct [Job_ticket_id])/4 as int) as Alarm_Val, 0 as Total_tickets 
FROM TEMP_TICKET_STATE_month
where  [Problem_Type_Name(Parent)]='Incident (Technical Issues)'  and PRIORITY_TYPE_NAME  in ('High') AND (ISNULL([Escalated to Closed time],0) <= 120 or ISNULL([Escalated to Resolved time],0) <=120)
group by [Problem_Type_Name(Parent)] ,[Problem_Type_Name(Child)] ) t

group by t.[Problem_Type_Name(Parent)],t.[Problem_Type_Name(Child)]) temp2

ON temp1.[Problem_Type_Name(Parent)]=temp2.[Problem_Type_Name(Parent)]
Group by temp1.[Assigned Tech],temp1.Close_Date,temp1.Job_ticket_id,temp1.NAME,temp1.[Problem_Type_Name(Parent)],temp1.[Problem_Type_Name(Child)] ,temp1.Report_Date

GO