Weekly Aggregation based on everyday date

Question

Hi All,
i have a table with 3 columns. Id , MeasureDate,Measure. Here   Id +MeasureDate as primary key.  In this table i want add a column Avg.  if i am running today 2/12/2014,2/5/2014,01/29/2014 and so on avarage value will be replaced in the
Avg column .
Give some ideas.
Thiru

Answer 1

Seems you need Running Averages. This sample code will help you understand.
CREATE TABLE #RunAVGTestData(ID INT PRIMARY KEY, VALUE INT)
INSERT #RunAVGTestData
SELECT 1,RAND()*10 UNION
SELECT 2,RAND()*10 UNION
SELECT 3,RAND()*10 UNION
SELECT 4,RAND()*10 UNION
SELECT 5,RAND()*10 UNION
SELECT 6,RAND()*10
SELECT a.id, a.value, (SELECT AVG(b.value)
FROM #RunAVGTestData b
WHERE b.id <= a.id)
FROM #RunAVGTestData a
ORDER BY a.id;
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