Page 6 - Big Data book

Differences between Structured, Semi-structured and Unstructured data:

PROPERTIES STRUCTURED DATA SEMI-STRUCTURED DATA UNSTRUCTURED DATA

It is based on It is based on
Relational database It is based on character and
Technology table XML/RDF binary data
Matured transaction Transaction is
and various adapted from No transaction
Transaction concurrency DBMS not management and
management technique matured no concurrency

Versioning over
Version Versioning over tuples or graph Versioned as
management tuples,row,tables is possible whole
It is more
flexible than
structuded data
but less than it very flexible
It is sehema flexible than and there is
dependent and less unstructured abbsence of
Flexibility flexible data schema

It’s scaling is
It is very difficult to simpler than
Scalability scale DB schema sstructured data It is very scalable

New technology,
Robustness Very robust not very spread —
Queries over
Structured query anonymous Only textual
allow complex nodes are query are
Query performance joining possible possible