Smart Report Engine supports two report data sources, which are:
1- Table-based data source (the default data source ): The report is based on one or more MYSQL tables.
2- SQL-based data source: The report is based on a SQL query. You should use this data source if you want to convert some queries to reports.
Usually, the report data source is defined when calling the 'ReportOptions' class constructor. So, If you are creating a table-based report, you need to call this method to define the table(s) you want to use for your report. You can select one or more tables.

You shouldn't call this method if you are creating a SQL-based report.

This method returns the calling object, so it can be chained with other methods in the ‘ReportOptions’ class

 
           $report = new ReportOptions(SRE_PUBLIC_REPORT);
$report->select_tables(array("items"))
           ->select_all_fields();
$engine = new CustomEngine($report);
$report_path = $engine->create_report();
            

__construct
set_sql
select_fields
select_all_fields
sub_totals
filter_like
calculatedcolumns

Using Multiple Tables With Smart Report Engine