Question

 Dim con1 As OleDb.OleDbConnection
            Dim cmd As OleDb.OleDbCommand
            Dim query As String


            Dim rs As OleDb.OleDbDataReader
            con1 = New OleDb.OleDbConnection("Provider=MSDAORA.1;Data Source=localhost;Persist Security Info=True;Password=sys;User ID=nitishok")
            con1.Open()


            query = "select * from HOLDERSDB where DOB like '" + DateTimePicker1.Value + "' "
            cmd = New OleDb.OleDbCommand(query, con1)
            cmd.CommandType = CommandType.Text
            rs = cmd.ExecuteReader

            Dim da As New OleDb.OleDbDataAdapter(query, con1)

            Dim ds As New DataSet()
            da.Fill(ds, "HOLDERSDB")
            DataGridView1.DataSource = ds.Tables(0)

            con1.Close()
    enter code here

i want rows from HOLDERS table that have DOB as datetimepicker1
The code that i have posted does not return any results.

Plz help.

Answer 1

assuming DOB is a DATE field (hopefully it is!)
then use TO_DATE and don’t try to compare date=string, otherwise your code will fail if not today then someday.

"select * from HOLDERSDB where dob = to_date(" + DateTimePicker1.Value + ", 'dd-mon-yyyy')

see here to format the return of DateTimePicker

http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.customformat.aspx

make sure to format it the same way as the 2nd parameter (doesnt have to be dd-mon-yyyy as i put, Oracle supports multiple formats) in the TO_DATE function.

also you should be using bind variables and not pasting strings into the SQL anyway for performance / security reasons.