修改查詢以根據特定列檢查組內的多個值

Question

我有來自外部系統的下表（數據是匿名的）：

我使用以下查詢按列cola 、 colb和colc的組合對結果進行colc ； case 語句將工作日列中的 x 值替換為amount列中的相應值。 這很好用。

SELECT
cola, 
colb, 
colc,
max(case when Mon = 'x' THEN amount END) as Mon,
max(case when Tue = 'x' THEN amount END) as Tue,
max(case when Wed = 'x' THEN amount END) as Wed,
max(case when Thu = 'x' THEN amount END) as Thu,
max(case when Fri = 'x' THEN amount END) as Fri,
max(case when Sat = 'x' THEN amount END) as Sat,
max(case when Sun = 'x' THEN amount END) as Sun
FROM tbltestquote
GROUP BY
cola, 
colb, 
colc

結果是：

我現在添加了一個名為threshold的新列。 可以看到，按cola 、 colb和colc分組時，可以有多個threshold ，如下圖：

我更新的 SQL 查詢將這個新列考慮在內是這樣的：

SELECT 
cola, 
colb, 
colc,
threshold,
max(case when Mon = 'x' THEN amount END) as Mon,
max(case when Tue = 'x' THEN amount END) as Tue,
max(case when Wed = 'x' THEN amount END) as Wed,
max(case when Thu = 'x' THEN amount END) as Thu,
max(case when Fri = 'x' THEN amount END) as Fri,
max(case when Sat = 'x' THEN amount END) as Sat,
max(case when Sun = 'x' THEN amount END) as Sun
FROM tbltestquote
GROUP BY
cola, 
colb, 
colc,
threshold

這將返回以下帶有兩個新行的結果集，這是正確的：

我現在想添加一個新的布爾列，該列指示在按cola 、 colb和colc分組時是否有多個閾值，根據下面的模型結果集：

請注意，對於cola 、 colb和colc組具有第二個閾值的所有行， hasMultipleThreshold列都為 TRUE，而不僅僅是一個不同的行。

如果確實可能，我不確定如何修改我對此列的查詢。 任何指導表示贊賞。

Answer 1

你可以試試下面——

SELECT 
cola, 
colb, 
colc,
threshold,
max(case when Mon = 'x' THEN amount END) as Mon,
max(case when Tue = 'x' THEN amount END) as Tue,
max(case when Wed = 'x' THEN amount END) as Wed,
max(case when Thu = 'x' THEN amount END) as Thu,
max(case when Fri = 'x' THEN amount END) as Fri,
max(case when Sat = 'x' THEN amount END) as Sat,
max(case when Sun = 'x' THEN amount END) as Sun,
case when count(*) over(partition by cola,colb,colc order by cola)>1 then 1 else 0 end as hasMultipleThreshold 
FROM tbltestquote a
GROUP BY
cola, 
colb, 
colc,
threshold

Answer 2

你可以試試這個

SELECT 
cola, 
colb, 
colc,
threshold,
max(case when Mon = 'x' THEN amount END) as Mon,
max(case when Tue = 'x' THEN amount END) as Tue,
max(case when Wed = 'x' THEN amount END) as Wed,
max(case when Thu = 'x' THEN amount END) as Thu,
max(case when Fri = 'x' THEN amount END) as Fri,
max(case when Sat = 'x' THEN amount END) as Sat,
max(case when Sun = 'x' THEN amount END) as Sun,
( select case 
        when count(threshold)>0 
            then cast(1 as bit) 
        else 
            cast(0 as bit) 
        end 
  from tbltestquote as ts where ts.cola=t.cola and ts.colb=t.colb and ts.colc= t.colc 
   group by ts.cola, ts.colb, ts.colc, ts.threshold ) as hasMultipleThreshold 
FROM tbltestquote as t
GROUP BY
cola, 
colb, 
colc,
threshold