In a (using mysql)table one of my column(i.e. colour) is like :
|Color|
======
|Red |
|Blue |
|Green|
|Red |
|Green|
|Green|
|Red |
|Red |
After establishing,jdbc connection in my current jsp page: I'm trying to show the value in a pie chart(it's wriien in jscript,where I'll putting the value from mysql) like :
|Color|no. of Times|
====================
|Red | 4 |
|Blue | 1 |
|Green| 3 |
Buy I am not able to put values into the graph(I guess there is problem in by code):
<%
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/apps","root","root");
Statement stmt = con.createStatement();
String sql2="select distinct(color) as COLOR from user_management order by device;";
ResultSet rs2 = stmt.executeQuery(sql2);
String s = rs2.getString("color");
while(rs2.next()){
String device = rs2.getString("color");
List<String> list=new ArrayList<String>();
list.add(device);
}
// I guess here will be some code for device value in String, say "s"
String sql1 = "select count(case when color='"+s+"' then 1 end) as COLOR from user_management";
ResultSet rs1 = stmt.executeQuery(sql1);
System.out.println(sql1);
%>
then putting the resultset in piechart table
<table id="chartData">
<% while(rs2.next()){ %>
<% while(rs1.next()){ %>
<tr>
<th>DEVICE</th><th>NUMBER</th>
</tr>
<tr style="color: #0DA068">
<td><%= rs2.getString("device")%></td><td><%= rs1.getString(1)%></td>
</tr>
<% }
%>
<% }
%>
</table>
Any inputs that how to fetch the column value in a chart where color-name as well as no. of color happens at a same time.