It is worth noting that ole db is compatible with ODBC and allows ole db to access existing ODBC data sources. The advantage is obvious, because ODBC is more common than ole db, the ODBC driver can be obtained correspondingly more than ole db. In this way, you do not have to get the ole db Driver to immediately access the original data system.
The provider is at the ole db layer, while the driver is at the ODBC layer. If you want to use an ODBC data source, you need to use the ole db Provider for ODBC, which then uses the corresponding ODBC driver. If you do not need an ODBC data source, you can use the corresponding ole db provider, which is usually called the local provider ).
It can be clearly seen that the use of ODBC providers requires an additional layer. Therefore, when accessing the same data, the ole db Provider for ODBC may be slower than the local ole db provider.
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