Row to column in oracle 10G - sql

Question

How to convert the row to column in oracle
Data is as under
AREA_CODE PREFIX
21 48
21 66
21 80
21 86
21 58
21 59
21 51
21 81
21 35
21 56
21 78
21 34
21 49
21 79
21 36
21 99
21 82
21 38
21 32
21 65
22 26
22 20
22 27
22 34
22 33
22 21
22 38
22 36
232 22
232 26
232 27
233 88
233 86
233 85
233 87
233 89
233 82
235 56
235 53
235 87
235 86
required output will b
AREA_CODE P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13
21 48 66 80 86 58 59 51 81 35 56 78 34 49
22 26 20 27 34 33 21 38 36
232 22 26 27 88 86 85 87 89 82 56 53 87 86

Answer 1

Assuming that number of prefix per area code is 10 and table name is table_name, this query can be used in 10 G
with tab as (select AREA_CODE,
PREFIX,
row_NUMBER() over(partition by AREA_CODE order by null) rn
from table_name)
select AREA_CODE,
min(decode(rn, 1, PREFIX, null)) as PREFIX1,
min(decode(rn, 2, PREFIX, null)) as PREFIX2,
min(decode(rn, 3, PREFIX, null)) as PREFIX3,
min(decode(rn, 4, PREFIX, null)) as PREFIX4,
min(decode(rn, 5, PREFIX, null)) as PREFIX5,
min(decode(rn, 6, PREFIX, null)) as PREFIX6,
min(decode(rn, 7, PREFIX, null)) as PREFIX7,
min(decode(rn, 8, PREFIX, null)) as PREFIX8,
min(decode(rn, 9, PREFIX, null)) as PREFIX9,
min(decode(rn, 10, PREFIX, null)) as PREFIX10
from tab
group by AREA_CODE
And in 11G
with tab as (select AREA_CODE,
PREFIX,
row_NUMBER() over(partition by AREA_CODE order by null) rn
from table_name)
select *
from tab
pivot (max(PREFIX) as PREFIX for RN in (1,2,3,4,5,6,7,8,9,10))
Output:
| AREA_CODE | 1_PREFIX | 2_PREFIX | 3_PREFIX | 4_PREFIX | 5_PREFIX | 6_PREFIX | 7_PREFIX | 8_PREFIX | 9_PREFIX | 10_PREFIX |
|-----------|----------|----------|----------|----------|----------|----------|----------|----------|----------|-----------|
| 21 | 58 | 86 | 80 | 66 | 56 | 59 | 51 | 81 | 35 | 48 |
| 22 | 33 | 34 | 27 | 20 | 26 | 21 | 36 | 38 | (null) | (null) |
| 232 | 27 | 26 | 22 | (null) | (null) | (null) | (null) | (null) | (null) | (null) |
| 233 | 85 | 86 | 88 | 87 | 82 | 89 | (null) | (null) | (null) | (null) |
| 235 | 56 | 53 | 87 | 86 | (null) | (null) | (null) | (null) | (null) | (null) |
for more values, you can change increase the list of min(decode(rn, 1, PREFIX, null)) as PREFIX1.
my test data was :
select 21,48 from dual union all
select 21,66 from dual union all
select 21,80 from dual union all
select 21,86 from dual union all
select 21,58 from dual union all
select 21,59 from dual union all
select 21,51 from dual union all
select 21,81 from dual union all
select 21,35 from dual union all
select 21,56 from dual union all
select 22,26 from dual union all
select 22,20 from dual union all
select 22,27 from dual union all
select 22,34 from dual union all
select 22,33 from dual union all
select 22,21 from dual union all
select 22,38 from dual union all
select 22,36 from dual union all
select 232,22 from dual union all
select 232,26 from dual union all
select 232,27 from dual union all
select 233,88 from dual union all
select 233,86 from dual union all
select 233,85 from dual union all
select 233,87 from dual union all
select 233,89 from dual union all
select 233,82 from dual union all
select 235,56 from dual union all
select 235,53 from dual union all
select 235,87 from dual union all
select 235,86 from dual