Question

我似乎遇到了SQL的最终部分问题。在我的SQL NULL中使用roll up函数实现组时出现。如何修改NULL以便在此聚合SQL中将其替换为TOTAL？

Current table returned
Name Activate Deactivate
Max      5       2
TAX     12       5
NULL    17       8

select 
    case 
    when (upper(m.email) like '%max.com') then 'MAX'
    when (upper(m.email) like '%tax.com') then 'TAX'
    else 'OTHER'
end Name, 
SUM(case when substring(convert(varchar(8),n.created_on,112),1,6) = '201209' then 1 else 0         end) 'Activated',
   SUM(case when substring(convert(varchar(8),m.LastLockoutDate,112),1,6)='201209' then 1 else 0              end) 'Deactivated'
           from membership.user_details d
          inner join membership.aspnet_membership m 
on m.userid = d.userid
        inner join membership.user_notes n 
         on n.userid = d.userid
        and n.CREATED_ON = (select min(created_on) 
                    from membership.user_notes 
                    where userid = n.userid
                        and note = 'received.')  
         where approved = 1
         group by case when (upper(m.email) like '%max.com') then 'MAX'
      when (upper(m.email) like '%tax.com') then 'TAX'
      else 'OTHER' end     
   with RollUp

Answer 1

ROLLUP在总计行中放置了null，因此如果您想要替换它，我建议您使用现有查询并将其放在子查询中，然后使用CASE NAME将null替换为Total。

您的代码与此类似：

select 
  case when name is null then 'Total' else name end Name,
  sum(Activated) Activated,
  sum(Deactivated) Deactivated
from
(
  select 
    case 
      when (upper(m.email) like '%max.com') then 'MAX'
      when (upper(m.email) like '%tax.com') then 'TAX'
      else 'OTHER'
    end Name, 
  SUM(case when substring(convert(varchar(8),n.created_on,112),1,6) = '201209' then 1 else 0         end) 'Activated',
  SUM(case when substring(convert(varchar(8),m.LastLockoutDate,112),1,6)='201209' then 1 else 0              end) 'Deactivated'
  from membership.user_details d
  inner join membership.aspnet_membership m 
    on m.userid = d.userid
  inner join membership.user_notes n 
    on n.userid = d.userid
    and n.CREATED_ON = (select min(created_on) 
                        from membership.user_notes 
                        where userid = n.userid
                          and note = 'received.')  
  where approved = 1
  group by case when (upper(m.email) like '%max.com') then 'MAX'
        when (upper(m.email) like '%tax.com') then 'TAX'
        else 'OTHER' end     
) src
group by name with rollup

如果不将查询包装在子查询中，则可以使用以下内容：

select
   case when 
     (case 
        when (upper(email) like '%max.com') then 'MAX'
        when (upper(email) like '%tax.com') then 'TAX'
        else 'OTHER'
      end) is null then 'Total'
      else case 
        when (upper(email) like '%max.com') then 'MAX'
        when (upper(email) like '%tax.com') then 'TAX'
        else 'OTHER'
      end end Name,
  SUM(case when substring(convert(varchar(8),n.created_on,112),1,6) = '201209' then 1 else 0 end) 'Activated',
  SUM(case when substring(convert(varchar(8),m.LastLockoutDate,112),1,6)='201209' then 1 else 0 end) 'Deactivated'
from membership.user_details d
inner join membership.aspnet_membership m 
  on m.userid = d.userid
inner join membership.user_notes n 
  on n.userid = d.userid
  and n.CREATED_ON = (select min(created_on) 
                     from membership.user_notes 
                     where userid = n.userid
                       and note = 'received.')  
where approved = 1
group by case when (upper(m.email) like '%max.com') then 'MAX'
        when (upper(m.email) like '%tax.com') then 'TAX'
        else 'OTHER' end with rollup

Answer 2

直接使用此名称参考：

case when grouping(Name) then 'Total' else Name end as Name

如果只使用一个级别的分组，则对null的测试就足够了;但是，分组（...）测试允许为每个不同的分组级别生成不同的描述。

Answer 3

您可以使用case函数包装isnull语句：

select 
    isnull
        (
        case 
            when (upper(m.email) like '%max.com') then 'MAX'
            when (upper(m.email) like '%tax.com') then 'TAX'
            else 'OTHER'
        end,
        'Total'
        ) Name, 
    SUM(case
            when substring(convert(varchar(8),n.created_on,112),1,6) = '201209'
            then 1
            else 0
        end) 'Activated',
    SUM(case
            when substring(convert(varchar(8),m.LastLockoutDate,112),1,6)='201209'
            then 1
            else 0
        end) 'Deactivated'
from membership.user_details d
    inner join membership.aspnet_membership m 
        on m.userid = d.userid
    inner join membership.user_notes n 
        on n.userid = d.userid
        and n.CREATED_ON =
            (
            select min(created_on) 
            from membership.user_notes 
            where userid = n.userid
                and note = 'received.'
            )  
where approved = 1
group by
    case
        when (upper(m.email) like '%max.com') then 'MAX'
        when (upper(m.email) like '%tax.com') then 'TAX'
        else 'OTHER'
    end     
with rollup

Answer 4

代替这部分

案例当（上方（m.email）如'％max.com'）然后'MAX' 当（上方（m.email）如'％tax.com'）然后是'TAX' 其他“ OTHER” 姓

只需使用

upper（REPLACE（COALESCE（m.email，'other'），'.com'，''））作为名称

无需编写子查询并将其进一步复杂化。

汇总功能 - 替换NULL

4 个答案: