SELECT curmonth "月份", ((curmonth_sum - lastyear_sum) / lastyear_sum * 100) "同比",
((curmonth_sum - lastmonth_sum) / lastmonth_sum * 100) "环比"
FROM (SELECT t.salarymonth curmonth, SUM (t.salary) curmonth_sum,
(SELECT SUM (t1.salary)
FROM d_month_salary t1
WHERE t1.salarymonth =
( (SUBSTR (t.salarymonth, 1, 4) - 1)
|| SUBSTR (t.salarymonth, -2)
)) lastyear_sum,
(SELECT SUM (t1.salary)
FROM d_month_salary t1
WHERE t1.salarymonth =
TO_CHAR
(ADD_MONTHS (TO_DATE (t.salarymonth, 'yyyymm'),
-1
),
'yyyymm'
)) lastmonth_sum
FROM d_month_salary t
GROUP BY t.salarymonth)