ADO Queries

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# ADO Queries

We may use SQL to create queries to specify only a selected set of records and fields to view.

## Examples

Display records where "Companyname" starts with an A
How to display only the records from the "Customers" table that have a "Companyname" that starts with an A.

Display records where "Companyname" is > E
How to display only the records from the "Customers" table that have a "Companyname" that is larger than E.

Display only Spanish customers
How to display only the Spanish customers from the "Customers" table.

Let the user choose filter
Let the user choose which country to show customers from.

## Display Selected Data

We want to display only the records from the "Customers" table that have a "Companyname" that starts with an A (remember to save the file with an .asp extension):

    <html>
    <body>

    <%
    set conn=Server.CreateObject("ADODB.Connection")
    conn.Provider="Microsoft.Jet.OLEDB.4.0"
    conn.Open "c:/webdata/northwind.mdb"

    set rs=Server.CreateObject("ADODB.recordset")
    sql="SELECT Companyname, Contactname FROM Customers
    WHERE CompanyName LIKE 'A%'"
    rs.Open sql, conn
    %>

    <table border="1" width="100%">
      <tr>
      <%for each x in rs.Fields
        response.write("<th>" & x.name & "</th>")
      next%>
      </tr>
      <%do until rs.EOF%>
        <tr>
        <%for each x in rs.Fields%>
          <td><%Response.Write(x.value)%></td>
        <%next
        rs.MoveNext%>
        </tr>
      <%loop
      rs.close
      conn.close%>
    </table>

    </body>
    </html>

Here is the result:

Companyname | Contactname
--- | ---
Alfreds Futterkiste | Maria Anders

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