updating database table via program

Hi,

I am updating a DB table (Sap standard table) via my program.

I have few doubts with regard to same. They are given below,

1. I came to know that it is not best practise to update the sap standard table via program using "update" statement. Why so? Is there any other way or statement in doing the same?

2. The sap standard table which i update via my program is BDRGIN. Now my question is, when my program is modifying the values of the table, if some other user also modifies the value at the same time via SE16 then conflict occurs. How to resolve it? Is SAP uses any automatic handling for such conflicts?

kindly help me out.

Regards,

Raghavendraprasad.N