| ODBC : data sources | ODBC data sources |
| ODBC : native driver | Native ODBC |
| ODBC : new features | New ODBC features |
| ODBC : support | ODBC 3.0 support |
| ODBC : version 3.0 | ODBC 3.0 support |
| ODBC : Windows CE | Using ODBC with Windows CE |
| Open Client : new features | JDBC, Open Client, and TDS support |
| Open Server : new features | JDBC, Open Client, and TDS support |
| Open Server Gateway : replaced | JDBC, Open Client, and TDS support |
| operating systems : supported | Platform and protocol support |
| optimizer : about | What is a query optimizer? |
| optimizer : new features | Query optimization enhancements |
| optimizer : user-supplied estimates | Fractional user-supplied estimates |
| options : new features | Resource management options New database options |
| Oracle : accessing | Remote data access |
| outer joins : behavior changes | Transact-SQL outer join changes |