     .        ,         ,    .   , ,     call_start   ,        :
SELECT COUNT(*)
FROM calls WHERE from_area = 512
AND call_start BETWEEN '14-FEB-981 AND '15-FEB-98';
        ,       DML-.        ,      (,     ,  ).    ,    OracleS      ,   .
:
        ,        .
, ,   "",     ,      .  , -,     .     DML-          .   ,        .          ,    :
	   ;
	  ;
	    .
       ,         ,          .   ,    ,     - ,    -    .
 
     ,      ,     ,    .     ?        
4.  ""  Oracle8	65