Answer these question(200-300 words for each question)

1. Explain, using proper database terminology, why it is only necessary to enter journal entries into the SAP system and it is not necessary to do postings from the general journal to the general ledger.
2. The chart of accounts is many times described in financial accounting as the central element of a general ledger system. If the chart of accounts is represented with a table in SAP, what would be its primary key? Why? What other fields would the table include? Why?
3. Would an SAP user need to understand the rules of database normalization to use SAP? Why, or why not?