Aggregate function after XMLTABLE returns empty result set
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I'm having troubles with a query in which I use the LISTAGG() function.
I start from table one in this form:
A B
1 a:b:e
2 c:d:f
Then I transform it in table two this form:
A B
1 a
1 b
1 e
2 c
2 d
2 f
Using this query:
SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Then I perform a
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM two
GROUP BY A
to go back again to the form:
A B
1 a,b,e
2 c,d,f
The problem is that in the end the query returns an empty result set:
A B
Instead of the one I'm expecting.
Unfortunately I can't recreate my problem with a simpler query and I cannot share the original query because it contains sensitive information.
I'm hoping this might be a known problem or maybe related to the field data type. I tried to add a TO_CHAR(B) inside the LISTAGG() function but with no success.
sql oracle
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
add a comment |
I'm having troubles with a query in which I use the LISTAGG() function.
I start from table one in this form:
A B
1 a:b:e
2 c:d:f
Then I transform it in table two this form:
A B
1 a
1 b
1 e
2 c
2 d
2 f
Using this query:
SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Then I perform a
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM two
GROUP BY A
to go back again to the form:
A B
1 a,b,e
2 c,d,f
The problem is that in the end the query returns an empty result set:
A B
Instead of the one I'm expecting.
Unfortunately I can't recreate my problem with a simpler query and I cannot share the original query because it contains sensitive information.
I'm hoping this might be a known problem or maybe related to the field data type. I tried to add a TO_CHAR(B) inside the LISTAGG() function but with no success.
sql oracle
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
2
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54
add a comment |
I'm having troubles with a query in which I use the LISTAGG() function.
I start from table one in this form:
A B
1 a:b:e
2 c:d:f
Then I transform it in table two this form:
A B
1 a
1 b
1 e
2 c
2 d
2 f
Using this query:
SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Then I perform a
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM two
GROUP BY A
to go back again to the form:
A B
1 a,b,e
2 c,d,f
The problem is that in the end the query returns an empty result set:
A B
Instead of the one I'm expecting.
Unfortunately I can't recreate my problem with a simpler query and I cannot share the original query because it contains sensitive information.
I'm hoping this might be a known problem or maybe related to the field data type. I tried to add a TO_CHAR(B) inside the LISTAGG() function but with no success.
sql oracle
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
I'm having troubles with a query in which I use the LISTAGG() function.
I start from table one in this form:
A B
1 a:b:e
2 c:d:f
Then I transform it in table two this form:
A B
1 a
1 b
1 e
2 c
2 d
2 f
Using this query:
SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Then I perform a
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM two
GROUP BY A
to go back again to the form:
A B
1 a,b,e
2 c,d,f
The problem is that in the end the query returns an empty result set:
A B
Instead of the one I'm expecting.
Unfortunately I can't recreate my problem with a simpler query and I cannot share the original query because it contains sensitive information.
I'm hoping this might be a known problem or maybe related to the field data type. I tried to add a TO_CHAR(B) inside the LISTAGG() function but with no success.
sql oracle
sql oracle
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
edited Nov 23 '18 at 14:00
jackscorrow
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
asked Nov 23 '18 at 11:26
jackscorrowjackscorrow
336317
336317
why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
2
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54
add a comment |
why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
2
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54
why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
2
2
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54
add a comment |
3 Answers
3
active
oldest
votes
You can try below
DEMO
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM
(SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
) two GROUP BY A
OUTPUT:
A B
1 a, b, e
2 c, d, f
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
add a comment |
this will work:
select a.*,REPLACE(a.B, ':', ',') from NS a;
sql fiddle:http://sqlfiddle.com/#!9/2c1e9d/2/0
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
add a comment |
My hunch about possible data type issues was correct.
The function xmltable returns a column of type XMLTYPE, in my case column B. The aggregate function failed whenever trying to aggregate a field of that data type.
I fixed the problem by converting the XMLTYPE column to string obtaining this query:
SELECT A,
trim((COLUMN_VALUE).getstringval()) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Using this query the returned result is correct.
Many thanks to everybody who tried to help.
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can try below
DEMO
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM
(SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
) two GROUP BY A
OUTPUT:
A B
1 a, b, e
2 c, d, f
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
add a comment |
You can try below
DEMO
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM
(SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
) two GROUP BY A
OUTPUT:
A B
1 a, b, e
2 c, d, f
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
add a comment |
You can try below
DEMO
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM
(SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
) two GROUP BY A
OUTPUT:
A B
1 a, b, e
2 c, d, f
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
You can try below
DEMO
SELECT A,
LISTAGG(B, ', ') WITHIN GROUP (ORDER BY B)
FROM
(SELECT A,
trim(COLUMN_VALUE) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
) two GROUP BY A
OUTPUT:
A B
1 a, b, e
2 c, d, f
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
answered Nov 23 '18 at 11:30
fa06fa06
19k21019
19k21019
add a comment |
add a comment |
this will work:
select a.*,REPLACE(a.B, ':', ',') from NS a;
sql fiddle:http://sqlfiddle.com/#!9/2c1e9d/2/0
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
add a comment |
this will work:
select a.*,REPLACE(a.B, ':', ',') from NS a;
sql fiddle:http://sqlfiddle.com/#!9/2c1e9d/2/0
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
add a comment |
this will work:
select a.*,REPLACE(a.B, ':', ',') from NS a;
sql fiddle:http://sqlfiddle.com/#!9/2c1e9d/2/0
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
this will work:
select a.*,REPLACE(a.B, ':', ',') from NS a;
sql fiddle:http://sqlfiddle.com/#!9/2c1e9d/2/0
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
answered Nov 23 '18 at 11:44
nikhil sugandhnikhil sugandh
1,3542820
1,3542820
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
add a comment |
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
My aim is not to replace the ":" with ",". The example I posted here is a simplification. Once I have my table two I have to filter out some rows and then put it back in the previous form. In my question I din't include this passage because I've seen that the result is the same even if I do just the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:52
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
@jackscorrow whats your original question then post that??
– nikhil sugandh
Nov 23 '18 at 18:19
add a comment |
My hunch about possible data type issues was correct.
The function xmltable returns a column of type XMLTYPE, in my case column B. The aggregate function failed whenever trying to aggregate a field of that data type.
I fixed the problem by converting the XMLTYPE column to string obtaining this query:
SELECT A,
trim((COLUMN_VALUE).getstringval()) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Using this query the returned result is correct.
Many thanks to everybody who tried to help.
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
add a comment |
My hunch about possible data type issues was correct.
The function xmltable returns a column of type XMLTYPE, in my case column B. The aggregate function failed whenever trying to aggregate a field of that data type.
I fixed the problem by converting the XMLTYPE column to string obtaining this query:
SELECT A,
trim((COLUMN_VALUE).getstringval()) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Using this query the returned result is correct.
Many thanks to everybody who tried to help.
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
add a comment |
My hunch about possible data type issues was correct.
The function xmltable returns a column of type XMLTYPE, in my case column B. The aggregate function failed whenever trying to aggregate a field of that data type.
I fixed the problem by converting the XMLTYPE column to string obtaining this query:
SELECT A,
trim((COLUMN_VALUE).getstringval()) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Using this query the returned result is correct.
Many thanks to everybody who tried to help.
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
My hunch about possible data type issues was correct.
The function xmltable returns a column of type XMLTYPE, in my case column B. The aggregate function failed whenever trying to aggregate a field of that data type.
I fixed the problem by converting the XMLTYPE column to string obtaining this query:
SELECT A,
trim((COLUMN_VALUE).getstringval()) B
FROM one,
xmltable(('"'
|| REPLACE(B, ':', '","')
|| '"'))
Using this query the returned result is correct.
Many thanks to everybody who tried to help.
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
answered Nov 23 '18 at 14:06
jackscorrowjackscorrow
336317
336317
add a comment |
add a comment |
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why are you converting from one table to another just do replace
– nikhil sugandh
Nov 23 '18 at 12:17
2
Your queries work correctly for me (although @nikhilsugandh's comment above and answer below are relevant). Something that you're not showing us is causing the problem, not any of the above. Best of luck.
– Bob Jarvis
Nov 23 '18 at 12:21
@BobJarvis In my original query I just perform a join with table two in order to filter out some rows later and then I put it back in the original form using LISTAGG. Here I din't include this passage because I've seen that the result is the same even if I don't execute the join, resulting in the steps that I listed above
– jackscorrow
Nov 23 '18 at 12:54