Back in the 90s Sybase was the only "major" database that SAP didn't support, ostensibly because it didn't support row-level locking, only page-level. Support for SQL Server 6.5 was added in 1993/1994 with the assistance of Microsoft (SQL Server also only supported page-level locking at the time and was still based largely on Sybase). Sybase ASE was only supported by SAP many years later, after they'd bought the company (primarily, I believe for the now-discontinued mobile products).
Back in the 90s Sybase was the only "major" database that SAP didn't support, ostensibly because it didn't support row-level locking, only page-level. Support for SQL Server 6.5 was added in 1993/1994 with the assistance of Microsoft (SQL Server also only supported page-level locking at the time and was still based largely on Sybase). Sybase ASE was only supported by SAP many years later, after they'd bought the company (primarily, I believe for the now-discontinued mobile products).