Difference between OLTP and OLAP.

OLTP	OLAP
OLTP, Online Transaction Processing are the operational data.	OLAP, Online Analytical Processing are the consolidation data.
OLTP are the orignal source data.	OLAP data comes from various OLTP databases.
It's purpose is to control and run fundamental business task.	To help with planning, problem solving and decision support.
Short and fast inserts and updates initiated by end users.	Periodic long running batch jobs refresh the data.
Relatively standardized and simple queries.	Often complex queries involving aggregations.
Typically very fast procesising speed.	Processing speed depends on the amount of data involved. Complex queries may take many hours.
Space: can be relatively small if historical data is archived.	Space: Larger due to the existence of aggregation structures and history data.
Highly normalized with many tables.	Typically de-normalized with fewer tables. Use of star and snowflake schema.
OLTP systems are used by clerks, DBAs or database professional.	OLAP systems are used by knowledge workers such as executives, managers and analyst.
It focuses on Data-In.	It focuses on Data-out.
Provides detailed and flat relational view of data.	Provide summarized and multi-dimensional view of data.
Number of record accessed is in tens.	Number of record accessed is in millions.
Database size is from 100MB to 1 GB	Database size is from 100 GB to 1 TB.
Provides high performance.	Highly flexible.