latest full half hour as per the clock time data in SQL
<p>I trying to fetch data for the latest full half hour as per the clock time.</p>

<p>for example if getdate() return me '2016-11-14 10:14:25.567' , i want data from '2016-11-14 09:30:00.000' to '2016-11-14 10:00:00.000'</p>