Step 1 - Construct
the Database info file
The database info file should contain the information required to create a connection to the database and the SQL
statements for each series of data.
Database Connection Info
There are 4 pieces of info required to make the Database
Connection. These are specified with the following parameters,
Database: - This is the database connection path and name.
eg. If you have a MySQL database called Sales you may have,
Driver: This is the location of the JDBC Driver for your database system. In order for the graphing servlet
to connect to your database it is vital that you have the correct JDBC driver set up and configured for you system.
For further information on JDBC database drivers please
User: The username which the graphing servlet will use to connect to the database
Password: The database password for the Username specified.
Series SQL Statements
For each series of data an SQL Statement should be specified. The graph servlet will execute each statement and
take the first data item of each record returned as the value for that data item. For instance if you have a table
which holds monthly sales figures for 2 products X and Y then your statements may look like,
series1: Select Value from SalesBar where Year=2004 and Product='X' ORDER
series2: Select Value from SalesBar where Year=2004 and Product='Y' ORDER BY Month
If 6 records are returned for each record set this would mean that there are 6 data points for each series of data.
For a template Database Info file please click here.