                     ---------- Drop Referential ----------

   ե󥷥롦󥹥ȥ쥤Ȥ "drop referential" ޥɤǺ뤳
 ȤǤޤ

 ιʸ

    drop | referential | [| constraint |] [constraint name]
         | refer       |  | check      |

         [on] CONSTRAINED_LIST  | insert |  CONSTRAINING_LIST;
                                | delete |

    CONSTRAINT_LIST:

                | TABLE (ATTR_NAME {,ATTR_NAME})   |
                | TABLE set ATTR_NAME {,ATTR_NAME} |

   constraint name  drop ̿ǻꤵ졢ˤ̾ˡǤʤС
 EMPRESS/32 Ϲ« constoraint name Ȥ°ɽƥ桼
 ǧޤ

   ˾ɬפʾϡʲ˼ޥɤϤƤ

                help create_referential;
                help range_check;
