Dear Varun
Take the developer help for defining & execution of SQL Query , Generally we use T.Code SQVI . I Hope defination part your are already done any how cross the check the below steps once again in query defination
You have to define the contents(Data Source) of report in SQL statement with appropriate restrictions .So it will describes which data is extracted from the system.
Create query variants You can create new query variants that define the layout of the query. The following settings are possible:
- Configure attributes You can modify the query attribute configuration. For example, you can set a filter attribute as mandatory or allow end-users to modify the settings.
- Configure key figures You can configure the key figures. For example, you can reorder the key figures or the reporting unit.
- Define chart You can predefine the analytical query chart type and the dimension.
Executing pivot query You can execute the pivot query to get the chart regarding the query variant settings. Within the chart, the following functions are available:
- Drilldown/Rollup You can use the drill-down function to add another characteristic to the query for more detailed information. To get a more general result, you can use the rollup functionality.
for your second question "where I can access the SAP EC database in order to understand the Table structure for report creation?
For table structures information see note 1427501. It has some pdf's of table structures in EC attached.
Balajee