Returns ID's where 2nd columns is not unique.
In SQL, I am trying to find a formula that finds ID's with exactly the same tagnumbers as a different ID. So for:
ID Tagnumber
1 44
1 45
2 45
2 44
3 42
3 44
3 44
4 55
4 55
4 55
4 55
It should return 1 and 2, because these ID's have a tagnumber composition that is not unique. The order or the amount of tag ID's does not matter, if the same tag id's also exist under a different ID, it should be returned. Any help is appreciated!
mysql sql
asked Nov 22 at 12:24
Dechesne
155
add a comment |
In SQL, I am trying to find a formula that finds ID's with exactly the same tagnumbers as a different ID. So for:
ID Tagnumber
1 44
1 45
2 45
2 44
3 42
3 44
3 44
4 55
4 55
4 55
4 55
It should return 1 and 2, because these ID's have a tagnumber composition that is not unique. The order or the amount of tag ID's does not matter, if the same tag id's also exist under a different ID, it should be returned. Any help is appreciated!
mysql sql
asked Nov 22 at 12:24
Dechesne
155
add a comment |
In SQL, I am trying to find a formula that finds ID's with exactly the same tagnumbers as a different ID. So for:
ID Tagnumber
1 44
1 45
2 45
2 44
3 42
3 44
3 44
4 55
4 55
4 55
4 55
It should return 1 and 2, because these ID's have a tagnumber composition that is not unique. The order or the amount of tag ID's does not matter, if the same tag id's also exist under a different ID, it should be returned. Any help is appreciated!
mysql sql
asked Nov 22 at 12:24
Dechesne
155
In SQL, I am trying to find a formula that finds ID's with exactly the same tagnumbers as a different ID. So for:
ID Tagnumber
1 44
1 45
2 45
2 44
3 42
3 44
3 44
4 55
4 55
4 55
4 55
It should return 1 and 2, because these ID's have a tagnumber composition that is not unique. The order or the amount of tag ID's does not matter, if the same tag id's also exist under a different ID, it should be returned. Any help is appreciated!
mysql sql
mysql sql
asked Nov 22 at 12:24
Dechesne
155
asked Nov 22 at 12:24
Dechesne
155
edited Nov 22 at 12:26
asked Nov 22 at 12:24
Dechesne
155
asked Nov 22 at 12:24
Dechesne
155
asked Nov 22 at 12:24
Dechesne
155
155
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You can use aggregation:
select tags, group_concat(id order by id) as ids
from (select id, group_concat(tagnumber order by tagnumber) as tags
from t
group by id
) i
group by tags
having count(*) > 1;
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can use aggregation:
select tags, group_concat(id order by id) as ids
from (select id, group_concat(tagnumber order by tagnumber) as tags
from t
group by id
) i
group by tags
having count(*) > 1;
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
add a comment |
You can use aggregation:
select tags, group_concat(id order by id) as ids
from (select id, group_concat(tagnumber order by tagnumber) as tags
from t
group by id
) i
group by tags
having count(*) > 1;
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
add a comment |
You can use aggregation:
select tags, group_concat(id order by id) as ids
from (select id, group_concat(tagnumber order by tagnumber) as tags
from t
group by id
) i
group by tags
having count(*) > 1;
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
You can use aggregation:
select tags, group_concat(id order by id) as ids
from (select id, group_concat(tagnumber order by tagnumber) as tags
from t
group by id
) i
group by tags
having count(*) > 1;
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
answered Nov 22 at 12:25
Gordon Linoff
755k35290398
755k35290398
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
add a comment |
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
Getting an error: "unknown column 'tagnumber' in 'field list'" I checked the column at it should be correct.
– Dechesne
Nov 22 at 12:49
1
1
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
@Dechesne this answer is correct. I interpreted it wrong. Removing my answer.
– Madhur Bhaiya
Nov 22 at 16:22
1
1
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
Thanks for your help Madhur.
– Dechesne
Nov 22 at 17:30
add a comment |
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