Data Warehouse - Copmarision Matrix

DW Product	IBM - DB2 Data Warehouse	Oracle - Exadata	Teradata
Company	IBM has four major businesses: hardware, software, services, and financing. Data warehousing is part of the data management business, which is part of the software business.	Oracle has three businesses: database, applications, and consulting. Its database business is the largest by far and currently represents 80 percent of Oracle’s new license revenues.	NCR has four businesses: data warehousing, financial self-service, retail store automation, and customer services. The Teradata Division is responsible for the data warehousing business
Product URL	www.ibm.com/DataWarehousing‎	https://www.oracle.com/database/data-warehouse/index.html	www.teradata.com/
STRENGTHS	- Rich and flexible data partitioning capabilities -strong analytic functionality in OLAP and data mining - Market presence - Data Models - Hardware bundle - Partner network - Strong services arm (IBM GSA)	- Intelligent Storage Grid - Hybrid Columnar Compression - Smart Flash Cache	- Massively-parallel, partitioned, - Shared-nothing database server architecture - its simple and highlyautomated physical data warehouse implementation -set of indexing approaches that enable fast access to data - scalable hybrid-storage capabilities - Teradata has buddied up with all enterprise Hadoop distro providers, enabled new analytic workloads to be added to Teradata systems (JSON, geospatial, 3D geospatial and others) and more.
WEAKNESSES	- complex physical implementation - lack of integration with multidimensional - High cost of ownership - DB2 on the open systems platforms continues to suffer from locking problems. • Closed systems; can’t easily ride cost curves associated with commodity hardware. • Expensive fault tolerant solution compared with Exadata		- its incomplete visual tools for build and manage functionality - Proprietary hardware - Costly to maintain and upgrade - Limited skilled implementation expertise
Deployment Platforms	IBM AIX Microsoft Windows Linux Sun Solaris	IBM AIX Hewlett-Packard HP-UX Linux Microsoft Windows Sun Solaris	NCR SVR4 UNIX MP-RAS Microsoft Windows
Server Architecture	Server platform with a single processor Single database partition on a server platform with a multiple processors Multiple partition configurations • Shared-nothing • Multiple server platforms • Server interconnect • Any number of readers and writers	Single server platform Distributed database Real Application Cluster (RAC) • Shared, partitioned data • Multiple server platforms • Server interconnect • Any number of readers and writers	Single and multiple node organization where a node is a hardware and software platform specialized and dedicated to data warehousing Teradata Warehouse is a sharednothing architecture in both its single and multiple node configurations
Data Type Support	SQL types: • Numeric • Binary • Character • Date time DATALINK XML Large objects (max 2 gigabytes) User-defined types (distinct— renamed SQL types, structured— object oriented, reference— hierarchies of built-in types)	Oracle built-in data types (SQL types): • Numeric • Binary • Character • Date time Large objects (max 2 gigabytes) User-defined types (object-oriented types, object identifier types, arrays, nested tables) Oracle-supplied types • Spatial • Media • Text • XML	SQL types: • Numeric • Binary • Character • Date time Large objects
Physical Design Recommendation	Neutral on the physical design of data warehouses.	Neutral on the physical design of data warehouses.	Teradata is neutral on the physical design of data warehouses but recommends a physical design of third normal form for data warehouses to maximize flexibility. Teradata further recommends that denormalized structures be implemented as views or redundant structures (logical data marts or special purpose tables).
Physical Implementation	Manual	Manual Template-based via templates and Database Configuration Assistant (DBCA) tool Automated via Oracle managed files	Automated
Custom Transformations	May be written in: SQL Java C++	May be written in: SQL PL/SQL	May be written in: SQL C++
Summary Table Support	Materialized query tables automate the creation and management of summary tables. A materialized query table stores the results of a query in a table	Materialized views automate the creation and management of summary tables. A materialized view stores the results of a query in a table	The OLAP transformations of Teradata Warehouse Miner can create and manage summary tables.
SQL Extensions	CUBE and ROLLUP in SELECT Functions • Aggregate • Numeric • Statistical • Correlation • Random number generation • Regression • Date time User-defined	CUBE and ROLLUP in SELECT Functions • Ranking • Window aggregate • Reporting aggregate • Lag/lead • Linear regression • Inverse percentile • Hypothetical rank and distribution • First/last • Numeric • Date time User-defined	QUALIFY, SAMPLE, and WITH in SELECT Functions and operators • Aggregate • Numeric • Date time • OLAP
OLAP	DB2 provides OLAP build and manage capabilities, relational OLAP on DB2 tables, and multidimensional and hybrid OLAP on a combination of DB2 tables and external multidimensional structures. DB2 OLAP Server is a separately- priced and -packaged product that is an external, but tightly integrated, multidimensional OLAP facility that IBM OEMs from Hyperion Solutions.	Oracle OLAP is a separatelypackaged and -priced product that provides OLAP functionality	Provides relational OLAP on Teradata Warehouse tables
Data Mining	DB2 Intelligent Miner is bundled with DB2 Data Warehouse Enterprise Edition.	Oracle Data Mining is a separately- priced and -packaged product.	Teradata Warehouse Miner is a separately-packaged and -priced product that is tightly integrated with Teradata Warehouse.