Differences between SQL2000,SQL2005 and SQL2008.

S.No	SQL 2000	SQL2005	SQL2008
1	Query Analyzer and Enterprise Manager are separate.	Both are combined as SQL SERVER MANAGEMEN STUDIO.	Both are combined as SQL SERVER MANAGEMEN STUDIO.
2	No XML datatype is used.	XML datatype is introduced.	XML datatype is used.
3	65,535 databases can be created.	2(pow(20))-1 databases can be created.	2(pow(20))-1 databases can be created.
4	Nill	Exception handling	Exception handling
5	Nill	Varchar(Max) datatype	Varchar(Max) datatype
6	Nill	DDL Triggers	DDL Triggers
7	Nill	Database mirroring	Database mirroring
8	Nill	Row number function for paging use.	Row number function for paging use.
9	Nill	Table fragmentation	Table fragmentation
10	Nill	Full text search	Full text search
11	Nill	Bulk copy update	Bulk copy update
12	Nill	Can’t encrypt	Can encrypt entire database
13	Compression not possible	Can compress tables and indexes(introduced in 2005 SP2)	Can compress tables and indexes
14	Datetime is used for both date and time	Datetime is used for both date and time	Date and time are separately used for date and time datatype
15	Nill	Narchar(max) and varbinary(max) is used.	Narchar(max) and varbinary(max) is used.
16	Nill	Nill	Table datatype is introduced.
17	Nill	SSIS is used.	SSIS is used.
18	Nill	Nill	Central Management Server(CMS) is introduced.
19	Nill	Nill	Policy based management is available.