Version 4.6x
If you need to find the logical database for a table name, you can used SE36 - Logical Database Bulider.
Steps :-
Go to transaction SE36
Click Extras -> Table usage
Supply the Table name and hit enter.
A Display Logical Database will be shown on a pop-up windows.
Return to :-
SAP Hints and Tips on Configuration
and ABAP/4 Programming