Преобразование столбцов в строки в оракула

Question

это мой стол в Oracle 11g:

**date   qty1   qty2    qty3   qty4** 
2-Feb-14   61   64    52   54 
2-Mar-14   124   130   149   156 

я хочу, чтобы преобразовать его в следующей таблице. т. е. добавить 7 дней к дате и перенести количество. И у меня есть до qty52 такие метрики

***date  qty*** 
**2-Feb-14  61** 
9-Feb-14   64 
16-Feb-14   52 
23-Feb-14   54 
**2-Mar-14  124** 
9-Mar-14   130 
16-Mar-14   149 
23-Mar-14   156 

Answer 1

select date,qty from 
(select date,qty1 as qty 
from tbl 
union 
select date+7 as date,qty2 as qty 
from tbl 
union 
select date+14 as date,qty3 as qty 
from tbl 
union 
select date+21 as date,qty4 as qty 
from tbl) 
order by date 

Answer 2

попробовать:

WITH t(my_date, val, val2, val3, val4) 
AS ( 
SELECT to_date('01/01/2014 12:00:00 AM', 'dd/mm/yyyy hh:mi:ss am'), 1,2,3,4 from dual 
UNION ALL 
SELECT to_date('01/02/2014 12:00:00 AM', 'dd/mm/yyyy hh:mi:ss am'), 5,6,7,8 FROM dual 
) 
SELECT (my_date-7) + (row_number() OVER (partition by my_date ORDER BY my_date)*7) my_date, value as qty 
FROM (
    (SELECT my_date, val, val2, val3, val4 FROM t 
    ) unpivot (value FOR value_type IN (val, val2, val3, val4))); 

выход:

MY_DATE      QTY 
----------------------- ---------- 
01/01/2014 12:00:00 AM   1 
08/01/2014 12:00:00 AM   2 
15/01/2014 12:00:00 AM   3 
22/01/2014 12:00:00 AM   4 
01/02/2014 12:00:00 AM   5 
08/02/2014 12:00:00 AM   6 
15/02/2014 12:00:00 AM   7 
22/02/2014 12:00:00 AM   8 

Answer 3

Тест

with tab(date_d,qty1,qty2,qty3,qty4) as (
    select '2-Feb-14',61,64,52,54 from dual union all 
    select '2-Mar-14',124,130,149,156 from dual), 
tab2(dd, ss) as (select date_d, qty1||','||qty2||','||qty3||','||qty4 from tab) 
select to_date(dd) + ((level-1) * 7) "DATE", regexp_substr(ss, '[^(,)]+', 1, level) "QTY" 
    from tab2 
connect by level <= length(ss) - length(replace(ss, ',')) + 1 
    and prior ss = ss 
    and prior sys_guid() is not null 

выход

|       DATE | QTY | 
|---------------------------------|-----| 
| March, 02 2014 00:00:00+0000 | 124 | 
| March, 09 2014 00:00:00+0000 | 130 | 
| March, 16 2014 00:00:00+0000 | 149 | 
| March, 23 2014 00:00:00+0000 | 156 | 
| February, 02 2014 00:00:00+0000 | 61 | 
| February, 09 2014 00:00:00+0000 | 64 | 
| February, 16 2014 00:00:00+0000 | 52 | 
| February, 23 2014 00:00:00+0000 | 54 | 

Позвольте мне знать, если он соответствует вашим требованиям.

Answer 4

Если у вас есть Oracle 11g, я бы посмотрел на это с помощью UNPIVOT.

select 
    start_date + to_number(week_number) * 7, 
qty 
from (
    select * 
    from quantity_data 
    unpivot (qty for week_number 
      in (qty1 as '0', qty2 as '1', qty3 as '2', qty4 as '3')) 
) 

Это альтернатива к примеру от ajmalmhd04, используя to_number вместо ROW_NUMBER аналитической функции. Ответ от ajmalmhd04, вероятно, более универсальный, хотя

Если вы не получили Oracle 11g, то попробуйте это для опции:

with pivot_data as (
    select 0 as pivot_col from dual union all 
    select 1 from dual union all 
    select 2 from dual union all 
    select 3 from dual 
) 
select 
    start_date + (7 * pivot_col) as start_date, 
    case 
    when pivot_col = 0 then qty1 
    when pivot_col = 1 then qty2 
    when pivot_col = 2 then qty3 
    when pivot_col = 3 then qty4 end as qty 
from 
    quantity_data cross join pivot_data 
order by 1