diff b/w DBMS & RDBMS?
Answer Posted / siju george
huh:
Lots of differences ! nah.simple logics thats it... let get
going.May be someone correct me if going wrong ... :)
theres some rules and regulations for how to store and
maintain data(using algebric algorithm) and they are
written in a genuine way and became famous and are called
Codd Rules(12 or may be more.....).So if we know these
rules then its very easy to differentiate between DBMS and
RDBMS
1. Any database which adheres to minimum of 5-6 codd rules
are automatically called as RDBMS. for e.g oracle,SQL,etc
2. Both help to store persistent data however DBMS stores
them in a denormalized way in rows and columns where as in
RDBMS stores them in tabular cells and there is chance to
split data(normalise) and store them in separate tables.
3. Most important is the 'R' letter which separates them in
terms of relationship management.RDBMS enforces
referrential Integrity and thus maintain the relationship
and in a way gives security of data(no accidental
loss/addition of data).
4. Security in RDBMS is provided in terms of
constraints/rules/sp/triggers/locks etc which ensures
i.Domain Intigrity(Primary Key,Unique key,Identity column)
ii. Entity Intigrity(Default,Foriegn Key,Not null,Check)
iii.Referential Intigrity(Foriegn key,Check) and
iv. User Defined Integrity(SP/Triggers/Rules)
5. RDBMS follows ACID(Automicity,Consistency,Isolation and
Durability) rule where as DBMS doesnt follows them.
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