Relational Databases
	Oracle	MySQL	SQL Server	PostgreSQL	Firebird	Teradata
Business Summary	An industry standard.	An industry standard. Best bang for the buck.	An industry standard. Best commercial RDBMS.	Bang for the buck.	Extensive history. Bang fo rht buck.	Specifically for huge data analysis.
EoU	Consultingware	medium	easy	medium		Consultingware
>10TB	ok	no	weak	no	no	Powerful	http://www.cio.com/archive/041505/tl_data.html
>2TB	Strong	weak	Strong	weak	weak	Powerful
Single Row Queries	Strong	Strong	Strong	Strong	Strong	weak
Query Cache
Can change table storage structure		yes		no
Data Types
Tools
Windows Standards	-
Unix Standards	-
Productivity	Counter-productive
Constraints
Sequential Numbers	~ sequences, no autonumber	~ identity
XML Support
Configuration Files	~ tnsnames.ora (not.xml)
Daily Consulting Cost	$2000 to $4000+
Command Line Scriptable	SQL+
View Renaming cascading to scripts	yes		no
RDBMS standards	no (users have tables rather than databases have tables, "schemas" terminology is misused)
Development
SQL Standards	osql, sql
RegEx support			no
Links
Database Related websites and links	http://www.craigsmullins.com/rellinks.htm
Head-to-Head OpenSource RDBMS's	http://www.geocities.com/mailsoftware42/db/
Problems with Oracle	http://www.thedailywtf.com/forums/25910/ShowPost.aspx
Performance Considerations	http://www.eweek.com/article2/0,3959,293,00.asp
Oracle's oracle Tom	http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:1886476148373
MySQL Review	http://www.devx.com/dbzone/Article/20743/1954?pf=true
MySql V Oracle v PostgreSQL	http://www-css.fnal.gov/dsg/external/freeware/mysql-vs-pgsql.html
Windows desktop databases	http://www.paragoncorporation.com/ITConsumerGuide.aspx?ArticleID=1
Data Warehousing	http://www.coffingdw.com/consultingindustry.asp