               ----------  Create or Drop Range Check  ----------

   "create range check" ޥɤˤäƥǡꤹ뤳ȤǤ
 ޤϡ"drop range check" ޥɤѤޤ
   °θϡĤͤ͡ϰϡͤ礭ѥ
 å󥰡뤤ϤȤ߹碌ˤĤƹԤȤǤޤ

 ιʸ

     create | range check | [on] TABLE.ATTR_NAME | [set] RANGE {, RANGE} |;
            | range       |                      | ( RANGE {, RANGE} )   |

 RANGE :

    [is] | VALUE                                                 |
         | OPERATOR VALUE                                        |
         | MATCH_OPERATOR PATTERN                                |
         | like PATTERN                                          |
         | between VALUE [|exclusive|] [and] VALUE [|exclusive|] |
         |                |inclusive|               |inclusive|  |
         | range VALUE [|exclusive|] [to] VALUE [|exclusive|]    |
         |              |inclusive|              |inclusive|     |

 OPERATOR is one of:  =, !=, <, >, <=, >=.

 MATCH_OPERATOR : match, !match, smatch, !smatch.

 PATTERN  "where_clause" Υإץե򻲾ȤƤ

 TABLE.ATTR_NAME ꤹȤϡ°ϤΥơ֥̾ǽʤФʤޤ
 

   ˾ɬפʾϡʲ˼ޥɤϤƤ

                help where_clause;

   "drop range check" ޥɤϡꤵƤ˻
 ޤ

 ιʸ

     drop | range check | [on] TABLE.ATTR_NAME;
          | range       |
