How to Select Date in SQLite - sqlite

Question

I have a problem with SQlite for DateTime in UWP-app.
Assume the SQLite DB has the following data:
PurchaseDate (Date in SQLite format)
-----------------------------------
2016-09-10 11:10:10
2016-09-10 11:10:15
2016-09-10 11:10:30
Pass in this Date:
strSQLiteDate ="2016-09-10"
I just want to check if there is any row in the tblPurchase.
There is no match from below SQL-Select. What did I miss? Did I miss the hh:mm:ss part? But I just need to check the yyyy-mm-dd part.
using (var db = new SQLite.Net.SQLiteConnection(new SQLite.Net.Platform.WinRT.SQLitePlatformWinRT(), DBPath))
{
var query = db.Query<tblPurchase>("Select * From tblPurchase where PurchaseDate = " + " date('" + strSQliteDate + "')");
intcount = query.Count;
if (intcount != 0)
{
return intcount;
}
}
Edit 1
10/8/2016 10:13:26 AM
The above date will be recreated as DateTime and SQLit.Net-PCL use it to insert into SQLite DB
string[] strAr_Date = strDate.Split('/');
string strYear = strAr_Date[0].ToString();
string strMth = strAr_Date[1].ToString();
string strDay = strAr_Date[2].ToString();
string strDateTime = strDay + "/" + strMth + "/" + strYear + " " + strTime;
DateTime dt = DateTime.Parse(strDateTime);

Answer 1

... where PurchaseDate = date('2016-09-10')
The date() function removes the time portion from a date/time value.
But the value 2016-09-10 does not have a time portion, so it is not changed.
The PurchaseDate values still have the time portion, so you end up with a comparison like this:
... where '2016-09-10 11:10:10' = '2016-09-10'
You have to remove the time from the PurchaseDate values:
... where date(PurchaseDate) = '2016-09-10'