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Step 1 - Construct the Database info file
The database info file contains both the information necessary to create a connection to the database and the SQL statements
to execute in order to retrieve the data values.
Database Connection Info
There are 4 pieces of info required to make the Database Connection
which are specified by the following parameters,
Database:
Driver:
User:
Password:
Database: - This is the database connection path and name.
eg. If you have a MySQL database called Sales you may have,
Database: jdbc:mysql://localhost/Sales
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 click here.
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 BY Month
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 bars for each series of data.
For a template Database Info file please click here.
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