ADO Query Data

We may use SQL to create queries to specify only a selection of records (and fields) to view.

Display Selected Data

Display companies that starts with "A"

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

Display customers from Spain

Here we want to display only the customers from Spain (remember to save the file with an .asp extension):

Create a filter for the user

Here we want to create a filter and let the user choose which country to show customers from (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 DISTINCT Country FROM Customers ORDER BY Country"
rs.Open sql, conn

country=request.form("country")
%>

<form method="post">
Choose Country <select name="country">
<% do until rs.EOF
response.write("<option")
if rs.fields("country")=country then
response.write(" selected")
end if
response.write(">")
response.write(rs.fields("Country"))
rs.MoveNext
loop
rs.Close
set rs=Nothing %>
</select>
<input type="submit" value="Show customers">
</form>

<%
if country<>"" then
sql="SELECT Companyname,Contactname,Country FROM Customers WHERE country='" & country & "'"
set rs=Server.CreateObject("ADODB.Recordset")
rs.Open sql,conn
%>

<table width="100%" cellspacing="0" cellpadding="2" border="1">
<tr>
<th>Companyname</th>
<th>Contactname</th>
<th>Country</th>
</tr>

<%
do until rs.EOF
response.write("<tr>")
response.write("<td>" & rs.fields("companyname") & "</td>")
response.write("<td>" & rs.fields("contactname") & "</td>")
response.write("<td>" & rs.fields("country") & "</td>")
response.write("</tr>")
rs.MoveNext
loop
rs.close
conn.Close
set rs=Nothing
set conn=Nothing%>
</table>
<% end if %>

</body>
</html>

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