Use isql (which comes as part of the UnixODBC installation):
    user> isql -v vardyurs <ursusername> <urspassword>
    +---------------------------------------+
    | Connected!                            |
    |                                       |
    | sql-statement                         |
    | help [tablename]                      |
    | quit                                  |
    |                                       |
    +---------------------------------------+
    SQL> quit
    user> 
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