how do I count the data plus list the data
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0
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I am very very new to SQL
For example, a student with 2 As and 3 Cs will produce two records: sid, A, 2; sid, C, 3. If the student doesn't have any grades I don't want them listed
select sid, count(grade) from enrollments
group by sid
Example of what I want:
sid grade
123 A,2; C,3
456 A,3; B,1
sql oracle
edited Nov 9 at 19:26
Littlefoot
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
add a comment |
up vote
0
down vote
favorite
I am very very new to SQL
For example, a student with 2 As and 3 Cs will produce two records: sid, A, 2; sid, C, 3. If the student doesn't have any grades I don't want them listed
select sid, count(grade) from enrollments
group by sid
Example of what I want:
sid grade
123 A,2; C,3
456 A,3; B,1
sql oracle
edited Nov 9 at 19:26
Littlefoot
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I am very very new to SQL
For example, a student with 2 As and 3 Cs will produce two records: sid, A, 2; sid, C, 3. If the student doesn't have any grades I don't want them listed
select sid, count(grade) from enrollments
group by sid
Example of what I want:
sid grade
123 A,2; C,3
456 A,3; B,1
sql oracle
edited Nov 9 at 19:26
Littlefoot
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
I am very very new to SQL
For example, a student with 2 As and 3 Cs will produce two records: sid, A, 2; sid, C, 3. If the student doesn't have any grades I don't want them listed
select sid, count(grade) from enrollments
group by sid
Example of what I want:
sid grade
123 A,2; C,3
456 A,3; B,1
sql oracle
sql oracle
edited Nov 9 at 19:26
Littlefoot
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
edited Nov 9 at 19:26
Littlefoot
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
edited Nov 9 at 19:26
Littlefoot
19.6k71433
edited Nov 9 at 19:26
Littlefoot
19.6k71433
edited Nov 9 at 19:26
Littlefoot
19.6k71433
19.6k71433
asked Nov 9 at 19:20
Hollywoodhd
42
asked Nov 9 at 19:20
Hollywoodhd
42
asked Nov 9 at 19:20
Hollywoodhd
42
42
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
1
down vote
I think this should work for you.
select sid,
listagg(gradecount, '; ') within group (order by gradecount) as grade
from (
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
) studentgradecount
group by sid;
If it seems confusing, try running the inner query by itself to see what it does:
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
answered Nov 9 at 20:33
kfinity
2,7391614
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
up vote
1
down vote
I think this should work for you.
select sid,
listagg(gradecount, '; ') within group (order by gradecount) as grade
from (
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
) studentgradecount
group by sid;
If it seems confusing, try running the inner query by itself to see what it does:
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
answered Nov 9 at 20:33
kfinity
2,7391614
add a comment |
up vote
1
down vote
I think this should work for you.
select sid,
listagg(gradecount, '; ') within group (order by gradecount) as grade
from (
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
) studentgradecount
group by sid;
If it seems confusing, try running the inner query by itself to see what it does:
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
answered Nov 9 at 20:33
kfinity
2,7391614
add a comment |
up vote
1
down vote
up vote
1
down vote
I think this should work for you.
select sid,
listagg(gradecount, '; ') within group (order by gradecount) as grade
from (
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
) studentgradecount
group by sid;
If it seems confusing, try running the inner query by itself to see what it does:
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
answered Nov 9 at 20:33
kfinity
2,7391614
I think this should work for you.
select sid,
listagg(gradecount, '; ') within group (order by gradecount) as grade
from (
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
) studentgradecount
group by sid;
If it seems confusing, try running the inner query by itself to see what it does:
select sid, grade || ',' || count(1) as gradecount
from enrollments
where grade is not null
group by sid, grade
answered Nov 9 at 20:33
kfinity
2,7391614
answered Nov 9 at 20:33
kfinity
2,7391614
answered Nov 9 at 20:33
kfinity
2,7391614
answered Nov 9 at 20:33
kfinity
2,7391614
2,7391614
add a comment |
add a comment |
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