Executes a statement that does not return a result set, such as an INSERT, UPDATE, DELETE, or data definition statement.
You can use ExecuteNonQuery to change the data in a database without using a DataSet. Do this by executing UPDATE, INSERT, or DELETE statements.
Although ExecuteNonQuery does not return any rows, output parameters or return values that are mapped to parameters are populated with data.
For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. For all other types of statements, and for rollbacks, the return value is -1.