NoSQL With 100% Correct Answers

NoSQL With 100% Correct Answers


LECTURE 19: NoSQL (11/19) -



examples of NoSQL databases - ANSWER big data, cassandra, dynamo, Hbase,
MongoDB, voldemort



4 NoSQL types - ANSWER -key-value stores (redis, riak, voldy)

-document stores (mongo)

-graph database (neo4j)

-column-family stores (cassandra, hbase)



examples of key-value stores - ANSWER -Redis

-Riak

-Voldemort



examples of document stores - ANSWER -MongoDB



examples of graph database - ANSWER -Neo4j



examples of column-family stores - ANSWER -Cassandra

-HBase



define key-value stores - ANSWER -key might be customer number

-value is whatever you like

-value can be structured data or unstructured

, Define Column-Family Stores - ANSWER -a single row key maps to multiple collections of
data

-like a two-level map

-row key -> column-family -> column key -> column value



Define Document-based Stores - ANSWER -database us a collection of documents

-often JSON

-document often has some unique ID



Define Graph Databases - ANSWER -similar to object-oriented structures

-nodes are entities with properties

-edges are relationships

-good for graph-like queries (ex. shortest path)



aggregates - ANSWER -the unit of storage, some meaningful chunk of data

-ie. student, course names, grades, GPA



implicit schema - ANSWER NoSQL dbs are sometimes called schema-less

-denormalized, not 1NF!



NoSQL query types - ANSWER -no complex queries

-no SQL support

-CRUD operations via API create, read, update, delete



NoSQL joins - ANSWER no join support