Group by a column from the first table
Group by a column from the first table

GrUSP/opencfp,opencfp/opencfp,localheinz/opencfp,localheinz/opencfp,GrUSP/opencfp,mdwheele/opencfp,mdwheele/opencfp,mdwheele/opencfp,PHPBenelux/opencfp,opencfp/opencfp,PHPBenelux/opencfp,localheinz/opencfp,localheinz/opencfp,GrUSP/opencfp,GrUSP/opencfp,mdwheele/opencfp,PHPBenelux/opencfp,opencfp/opencfp,PHPBenelux/opencfp