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Solved
query to parse string
Posted on 2014-01-10
I have a table with two columns..
I am just displaying one record for brevity
COL_STR KEY
COL_A, COL_B, COL_C, COL_D COL_A
I need a query to process the above two values and return the following
return_val
TGT.COL_B = SRC.COLB
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
i would like the value in the key column to be excluded (in the above example COL_A)
if key has following
COL_A, COL_B
the output should be:
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
Please let me know if this is possible..
Thanks,
I am just displaying one record for brevity
COL_STR KEY
COL_A, COL_B, COL_C, COL_D COL_A
I need a query to process the above two values and return the following
return_val
TGT.COL_B = SRC.COLB
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
i would like the value in the key column to be excluded (in the above example COL_A)
if key has following
COL_A, COL_B
the output should be:
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
Please let me know if this is possible..
Thanks,
[X]
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8 Comments
Active today
This should work in 10.2.0.1 and above
I made the assumption that you would have 10 columns or less. If that's not true, simply bump up the LEVEL <= 10 to something large enough to accomodate your data
SELECT 'TGT.' || str || ' = ' || 'SRC.' || str
FROM (SELECT REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
str
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
IS NOT NULL
MINUS
SELECT REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
IS NOT NULL)
I made the assumption that you would have 10 columns or less. If that's not true, simply bump up the LEVEL <= 10 to something large enough to accomodate your data
SELECT 'TGT.' || str || ' = ' || 'SRC.' || str
FROM (SELECT REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
str
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
IS NOT NULL
MINUS
SELECT REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
IS NOT NULL)
Active today
Assuming there is an id column or some other values in your table that you want to keep track of with each row simply add it to the selects...
For example, using an ID column...
SELECT id, 'TGT.' || str || ' = ' || 'SRC.' || str
FROM (SELECT id,
REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
str
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
IS NOT NULL
MINUS
SELECT id,
REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
IS NOT NULL)
For example, using an ID column...
SELECT id, 'TGT.' || str || ' = ' || 'SRC.' || str
FROM (SELECT id,
REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
str
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
col_str,
'[^ ,]+',
1,
n
)
IS NOT NULL
MINUS
SELECT id,
REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
FROM yourtable,
( SELECT LEVEL n
FROM DUAL
CONNECT BY LEVEL <= 10)
WHERE REGEXP_SUBSTR(
key,
'[^ ,]+',
1,
n
)
IS NOT NULL)
Active today
You're always doing a great job here at EE, sdstuber. But I think it would be nice, if you might explain your (awesome) SQL statements a bit more to the asker (so they may learn better to use and adept).
Just a thought ;-) Keep going!
Kind regards,
Alex
Just a thought ;-) Keep going!
Kind regards,
Alex
Active today
Thanks sdstuber..It works..but I need to do this procedurally in a dynamic sql and generate a merge statement..i will close this and open and another question with more details
Thanks
Thanks
Active today
Sdstuber..Is there a way to get result it as one value rather than multiple records
I just want the result as a value not the records, the above example gives me 3 records instead of record with:
TGT.COL_B = SRC.COLB
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
Thanks
I just want the result as a value not the records, the above example gives me 3 records instead of record with:
TGT.COL_B = SRC.COLB
TGT.COL_C = SRC.COL_C
TGT.COL_D = SRC.COL_D
Thanks
Active today
As I have closed this..I have opened a new one..
http://www.experts-exchange.com/Database/Oracle/Q_28335896.html
Thanks
http://www.experts-exchange.com/Database/Oracle/Q_28335896.html
Thanks
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