DDIC:- Central source of information for the data in a database management is DDIC. Objects:- Tables, view, data element, structure, table type, domain, type group, search help, lock object. Tables:- Tables are the entities whose information is stored in database. Information is stored in tables as a row and columns; name must be started with Y or Z & can be 16 char long. Tables are client dependent or client independent based on the field MANDT. Client Dependent:- tables which can be access by some specific user are client dependent. If the first field of the table is MANDT and data type is CLNT, the length is 3 then it is called client dependent table. Client dependent means if we make change in one client it will be reflected in the entire cross clients. If we have 3 clients: 300,310,320. If we change in 320 it will change in 300 and 310 as well. Client Independent:- Tables which can be access by all user are client independent (no MA...