BCP i.e. Bulk Copy Program is a command-line tool used to import or export data against a Microsoft SQL Server or Sybase database in a user-specified format.
Syntax
bcp {[[database_name.][owner].]{table_name | view_name} | "query"}
{in | out | queryout | format} data_file
[-m max_errors] [-f format_file] [-e err_file]
[-F first_row] [-L last_row] [-b batch_size]
[-n] [-c] [-w] [-N] [-V (60 | 65 | 70)] [-6]
[-q] [-C code_page] [-t field_term] [-r row_term]
[-i input_file] [-o output_file] [-a packet_size]
[-S server_name[\instance_name]] [-U login_id] [-P password]
[-T] [-v] [-R] [-k] [-E] [-h "hint [,...n]"]
For more detail please look at http://technet.microsoft.com/en-us/library/aa174646(v=sql.80).aspx