,         ,     " "  ,  :
SELECT dept.dname, ename
FROM emp WHERE job = 'CLERK';
          ,                  ,       .
 , REF          ,     (  )   ,          .    ,   REF         ,  ,          . Oracle         .  VSIZE ,     36 .           REF-        ,      .
   ()
   ()     ,       ,         .         ,             .
:
      ,   Boolean        .      Oracle   1997        Oracle        : "     ,        ,       ".
       (collections),   ,       . ,       staff_assignment_o  ,    ,         .    ,       :
100	Oracle 8