How to retrieve the parent and the child in different columns when they exist in a single column.
For example, my table contains data in a column as follows.
COLUMN_DATA
-------------------------
A00 FOOD 0
A01 0 DENTAL
A02 0 PLASMA
A01A0 CLEAR
A02A0 CHANNEL
A01A1 ANTACIDS
A01A2 ANTACIDS + Napthalone
A01A3 ANTACIDS + Olive
A02A1 ACIDS
A02A2 PLASMAACIDS
Now, there is a relationship between codes. Four level hierarchy is maintained. EG - A01A1-> A01A0-> A01-> A00 0 0
I want to receive data as in the format below:
T4_CODE T4_DESC T3_CODE T3_DESC T2_CODE T2_DESC T1_CODE T1_DESC
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ANTACIDS A01A PLAIN A01 DENTAL A01A1 A DIGESTIVE
A01A2 ANTIACIDES + Napthalone A01A PLAIN A01 DENTAL a DIGESTIVE
A01A3 ANTIACIDES + Olive A01A PLAIN A01 DENTAL a DIGESTIVE
A02A1 ACIDS A02A CANAL A02 PLASMA A ALIMENTARY
A02A2 PLASMAACIDS A02A A02 PLASMA CHANNEL HAS DIGESTIVE
So we must derive the level four of codes and their descriptions in different columns.
Any help is really appreciated.
Thanks in advance.
And I got a simpler and more efficient way to do ds.
with t as
(select text
case
When substr (text, 4, 1) = ""
then rtrim (substr (text, 1, 3), ' 0')
of another rtrim (substr (text, 1.5), ' 0')
end of the code
, substr (text, 7) descript
of lc_load
)
t2 as
(select
case length (t.code)
When 1
then 1
When 3
then 2
When 4
then 3
When 5
then 4
end lvl
, t.*
t
)
Select t2_4.code
t2_4.descript
t2_3.code
t2_3.descript
t2_2.code
t2_2.descript
t2_1.code
t2_1.descript
of t2_1 t2
Join t2 t2_2
on t2_1.code = substr (t2_2.code, 1, 1)
Join t2 t2_3
on t2_2.code = substr (t2_3.code, 1, 3)
Join t2 t2_4
on t2_3.code = substr (t2_4.code, 1, 4)
where t2_1.lvl = 1
and t2_2.lvl = 2
and t2_3.lvl = 3
and t2_4.lvl = 4
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