SELECT 
 sum( decode( trunc( executions/5,0), 0, 1, 0 ) ) "0-4",
 sum( decode( trunc( executions/5,0), 1, 1, 0 ) ) "5-9",
 sum( decode( trunc( executions/5,0), 2, 1, 0 ) ) "10-14",
 sum( decode( trunc( executions/5,0), 3, 1, 0 ) ) "15-19",
 sum( decode( trunc( executions/5,0), 4, 1, 0 ) ) "20-24",
 sum( decode( trunc( executions/25,0), 0, 0, 1 ) ) "25>=",
 count(*) "Cursores",
 sum(executions) "Execuções",
 sum(executions)/count(*) "Exec/Cursor"
FROM v$sqlarea
/