A simple statement is valid either in a procedure of an SQL
    module file or in an embedded host language program prefixed
    by the keywords EXEC SQL:

    o  Module SQL

       See the Oracle Rdb SQL Reference Manual for information about
       using simple statements in module procedures in an SQL module
       file.

    o  Embedded SQL

       See the Oracle Rdb SQL Reference Manual for information
       about using simple statements in embedded procedures in host
       language programs.