Comparing output of program with the sqlite database

I am comparing dataVal output with the sqlite database as shown in the code below.

For Example: Lets assume output of dataVal is Kelly. When I run the program, in the first loop string z stores value "K" and then store "Kelly" only after second loop. Can someone please elaborate what is happening here and how to get the value of z as 'Kelly' after first loop?

 

dataVal = string.Join("", dataResult.ToArray());

Aryabase databaseObject = new Aryabase();

if (dataVal.StartsWith('k'))

{

using (SQLiteConnection con = new SQLiteConnection(databaseObject.myConnection))

{

SQLiteCommand cmd = new SQLiteCommand("select * from k where Data like 'k%'", con);

con.Open();

var rdr = cmd.ExecuteReader();

while (rdr.Read())

{

string z = Convert.ToString(rdr["Data"]);

if (dataVal == z)

{

Console.WriteLine(Convert.ToString(rdr["Data"]));

}

}

}

}