Convert columns to rows in oracle [duplicate] - oracle

Question

This question already has answers here:
Oracle SQL pivot query
(4 answers)
Closed 8 years ago.
this is my table in oracle 11g:
**date qty1 qty2 qty3 qty4**
2-Feb-14 61 64 52 54
2-Mar-14 124 130 149 156
i want to convert it into the following table. i.e. add 7 days to the date and transpose the qty. And i have till qty52 such metrics
***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

have a try:
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) ) );
output:
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 2

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 3

If you've got Oracle 11g, I'd look at doing it with 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'))
)
This is an alternative to the example from ajmalmhd04, using to_number instead of the row_number analytic function. The answer from ajmalmhd04 is probably more generic though
If you haven't got Oracle 11g then try this for an option:
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

Answer 4

Try this
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
output
| 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 |
Let me know if it meets your requirement.