[ ORDER BY 
   { expr | position } [ ASC | DESC ] 
   [, { expr | position } [ ASC | DESC ]]... 
 | FOR UPDATE 
   [OF [[schema.] { table. | view. | snapshot }] column 
    [, OF [[schema.] { table. | view. | snapshot }] column]...
   ]
   [NOWAIT]
 ] 
 [ ORDER BY 
   { expr | position } [ ASC | DESC ] 
   [, { expr | position } [ ASC | DESC ]]... 
 | FOR UPDATE 
   [OF [[schema.] { table. | view. | snapshot }] column 
    [, OF [[schema.] { table. | view. | snapshot }] column]...
   ]
   [NOWAIT]
 ]...