Close

Closes an open Connection object and any dependent objects.

Execute

Executes the specified query, SQL statement, stored procedure, or provider-specified text.

Open

Opens a connection to a data source.

OpenSchema

Obtains database schema information from the provider. This method is not currently supported on UNIX.

BeginTrans, CommitTrans, and RollbackTrans

Cancels any changes made during the current transaction and ends the transaction. It may also start a new transaction.