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<h1>ADO Queries</h1>
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<p class="intro">We may use SQL to create queries to specify
only a selected set of records and fields to view.</p>
<hr />
<h2>Examples</h2>
<p>
<a target="_blank" href="showasp.asp@filename=demo_query_1">Display records
where "Companyname" starts with an A</a><br />
How to display only the records from the "Customers" table that have a "Companyname"
that starts with an A.</p>
<p>
<a target="_blank" href="showasp.asp@filename=demo_query_2">Display records
where "Companyname" is > E</a><br />
How to display only the records from the "Customers" table that have a "Companyname"
that is larger than E.</p>
<p>
<a target="_blank" href="showasp.asp@filename=demo_query_3">Display only Spanish
customers</a><br />
How to display only the Spanish customers from the "Customers" table.</p>
<p>
<a target="_blank" href="showasp.asp@filename=demo_query_4">Let the user choose
filter</a><br />
Let the user choose which country to show customers from.</p>
<hr />
<h2>Display Selected Data</h2>
<p>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):</p>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr>
<td>
<pre><html>
<body></pre>
<pre><%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"</pre>
<pre>set rs=Server.CreateObject("ADODB.recordset")
sql="SELECT Companyname, Contactname FROM Customers
WHERE CompanyName LIKE 'A%'"
rs.Open sql, conn
%></pre>
<pre><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></pre>
<pre></body>
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</td>
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<p>Here is the result:</p>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr>
<th>Companyname</th>
<th>Contactname</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Maria Anders</td>
</tr>
</table>
<br />
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