SQl：分組依據時計數內的個案

Question

我有一個系統，要求用戶填寫一些圖表。 他們可以填寫所需的數量，但至少必須填寫2。我需要構建一個SQL調用，該調用計算已填寫的表格數量，但每人最多只能包含2個。

除了Count()函數之外，其他所有東西都按預期工作。

Select mappingid, formTypeId as "Form Type", abbreviation, 
   Count( case when formtypeid >= 2 then 2 else formTypeID end) as "Chart Count"
        From tables.dbo.forms
        where questions = answered and formtypeid = 3
        group by mappingid, formtypeid, abbreviation;

第7行，最后一列應打印2而不是4。

編輯-已添加數據

Answer 1

嘗試這個..

Select mappingid, formTypeId as "Form Type", abbreviation,
case when count(formtypeid) >= 2 then 2 else Count(formTypeID) end as "Chart Count"
From tables.dbo.forms
where questions = answered and formtypeid = 3
group by mappingid, formtypeid, abbreviation;

Answer 2

如果我理解正確，您只想將計數限制為最大2：

Select mappingid, formTypeId as FormType, abbreviation, 
       (case when count(*) > 2 then 2 else count(*) end) as ChartCount
From tables.dbo.forms
where questions = answered and formtypeid = 3
group by mappingid, formtypeid, abbreviation;