You can move DWG (drawing object) data into any Oracle database to which you have connected in AutoCAD Map 3D. You can also move DWG data into existing ESRI ArcSDE data stores to which you have connected in AutoCAD Map 3D.
You can export a single class at a time and use the Feature Class tab to match your output fields to the existing fields. The left-hand column on the Feature Class tab (on the Export dialog box) is an expression, which allows you to concatenate fields or do calculations on them.
You can also use scripting to perform export operations. For single-class export, the parameters for each export operation can be saved in a profile and you can export multiple classes with a single script. This is helpful for the cases where the same complex set of operations must be done frequently.