To define a collating sequence using the DEFINE COLLATING_
    SEQUENCE statement, you must have the Oracle Rdb DEFINE privilege
    for the database.

    The DEFINE COLLATING_SEQUENCE statement is the first step in
    specifying an alternate collating sequence. After you define
    the collating sequence, you must specify that it will apply
    to a particular field or database. The following list shows
    abbreviated forms of the statements that will associate the
    collating sequence with a particular field or database:

    o  DEFINE FIELD ... COLLATING_SEQUENCE sequence-name;

    o  DEFINE DATABASE ... COLLATING_SEQUENCE sequence-name;

    o  IMPORT ... COLLATING_SEQUENCE sequence-name;

    Use the complete form of the following statement to alter a
    collating sequence after you have associated it with a field:

    o  CHANGE FIELD ... COLLATING_SEQUENCE sequence-name;