Complex sentence: Sybase SQL Server version 4.9 and Microsoft SQL Server 6.0 & 6.5 are virtually identical; their Transact-SQL (T-SQL) procedural language is very similar, as well as the basic process architecture.
Split into simpler sentences: Sybase SQL Server version 4.9 and Microsoft SQL Server 6.0 & 6.5 are virtually identical. Their Transact-SQL (T-SQL) procedural language is very similar, as is the basic process architecture.