19.1 Comments/Troubleshooting

All Command objects implement the IDbCommand interface from the System.Data namespace, and are thus quite similar. In all basic ADO.NET providers, the Command object encapsulates a SQL statement or stored procedure call.

Some Command classes for ADO.NET providers are shown in Table 19-1.

Table 19-1. Provider-specific Command classes

Class	Data source
System.Data.SqlClient.SqlCommand	SQL Server
System.Data.OleDb.OleDbCommand	An OLE DB provider
System.Data.Odbc.OdbcCommand	An ODBC driver
System.Data.OleDb.OracleCommand	Oracle