Terminology Mapping between Oracle and SQL Server

Terminology	Oracle	SQL Server
	schema	database
	service name	database name
	System ID (SID)	database name
Storage	block	page
Extent	user-defined	fixed at 8 pages
Storage management pages (SMP)	dictionary or local	local only
Metadata	data dictionary	SYS database
Recursive SQL	connect by clause	HierarchyID data type
Language	PL/SQL	T-SQL