how to get a average of days with two different tables
<p>There are two tables 1)HR_OrderRequest (column to be considered is HRdate) other columns are HRUID,UID
                     2)HR_Supplydetails(colmn to be considered is HRUID) other columns are createddttm,UID
by considering the date from HR_Supplydetails we should find the average days taken for that particular UID time taken to release of HRdate .I have a problem getting a average of days</p>

<p>Please do the need .</p>
