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using (var mySysDB = new SysDB<SysLog>(SysDB<SysLog>.GetConn))
{
DateTime? queryDate = new DateTime(2015, 8, 24);
var bb = mySysDB.SysLog.Where(p => EntityFunctions.DiffDays(p.Date,queryDate) == 0);
var ss = mySysDB.SysLog.Where(p => EntityFunctions.TruncateTime(p.Date) == queryDate);
var aa = from A in mySysDB.SysLog
where EntityFunctions.TruncateTime(A.Date) == queryDate
select A;
int totalRows = bb.Count();
}