Many people still asks how to create field catalog for CL_GUI_ALV_GRID or REUSE_ALV_GRID_DISPLAY on a base of internal table. This is very easy since we have SALV classes, you could see it in my article Create ...
In article Link Attachments of Purchase Requisition to Purchase Order I've shown how to link standard attachments from purchase requisition to purchase orders, but to have full set of options we also ...
I think that any of us had meet the situation when we needed to create an Excel output from internal table in background. There is a really nice project called ABAP2XLSX which gives you to possibility ...