Question

the following statement:

group by datepart(wk, createdon)

Groups the selected rows according to the week in which they fall. My select statement shows the following:

SELECT 
    datepart(wk, createdon) week,

How do I display the actual datetime of the week(“12-10-2012”), instead of the number (“12”)?

Answer 1

If I understand you correctly, you’re wanting to group by week but also return the full datetime. You must include the selected fields in aggregate columns.
Thusly should work:

SELECT DATEPART(wk, createdon) week, createdon
FROM TableName
GROUP BY DATEPART(wk, createdon), createdon

Works on MSSQL2008R2

Edit:
As the OP seems to want the starting date of the week, SO has the answer.