How to find least group of students
-1
I have this tables:
Student - Id, FirstName, LastName, Age
Group - Id, Name
Student_Group - Student_Id, Group_Id
I need to find least group of student. I have tried many times. I would be so glad if somebody helped.
sql
sql-server join many-to-many asked Nov 14 '18 at 13:10
Nasirli01
236
|
show 1 more comment
-1
I have this tables:
Student - Id, FirstName, LastName, Age
Group - Id, Name
Student_Group - Student_Id, Group_Id
I need to find least group of student. I have tried many times. I would be so glad if somebody helped.
sql
sql-server join many-to-many asked Nov 14 '18 at 13:10
Nasirli01
236
Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23
|
show 1 more comment
-1
-1
-1
I have this tables:
Student - Id, FirstName, LastName, Age
Group - Id, Name
Student_Group - Student_Id, Group_Id
I need to find least group of student. I have tried many times. I would be so glad if somebody helped.
sql
sql-server join many-to-many asked Nov 14 '18 at 13:10
Nasirli01
236
I have this tables:
Student - Id, FirstName, LastName, Age
Group - Id, Name
Student_Group - Student_Id, Group_Id
I need to find least group of student. I have tried many times. I would be so glad if somebody helped.
sql
sql-server join many-to-many sql
sql-server join many-to-many asked Nov 14 '18 at 13:10
Nasirli01
236
asked Nov 14 '18 at 13:10
Nasirli01
236
asked Nov 14 '18 at 13:10
Nasirli01
236
asked Nov 14 '18 at 13:10
Nasirli01
236
asked Nov 14 '18 at 13:10
Nasirli01
236
236
Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23
|
show 1 more comment
Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23
Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23
|
show 1 more comment
2 Answers
2
active
oldest
votes
2
Have you tried to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
WHERE count(sg.student_id) >0
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
?
If you want also the groups with 0 students you should to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
answered Nov 14 '18 at 13:22
David Marabottini
1707
add a comment |
2
--If you just need the group with the least members,
--Group By and Count will work to find the Group with the least members
--Then use select top 1 record and order by GroupCount Ascending
SELECT TOP 1 Group_Id, COUNT(Group_Id) AS [GroupCount]
FROM Student_Group
GROUP BY Group_Id
ORDER BY [GroupCount]
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
|
show 1 more comment
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
2
Have you tried to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
WHERE count(sg.student_id) >0
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
?
If you want also the groups with 0 students you should to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
answered Nov 14 '18 at 13:22
David Marabottini
1707
add a comment |
2
Have you tried to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
WHERE count(sg.student_id) >0
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
?
If you want also the groups with 0 students you should to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
answered Nov 14 '18 at 13:22
David Marabottini
1707
add a comment |
2
2
2
Have you tried to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
WHERE count(sg.student_id) >0
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
?
If you want also the groups with 0 students you should to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
answered Nov 14 '18 at 13:22
David Marabottini
1707
Have you tried to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
WHERE count(sg.student_id) >0
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
?
If you want also the groups with 0 students you should to do
SELECT top 1 g.name
FROM group g INNER JOIN Student_group sg ON g.id = sg.Group_Id
ORDER BY count(sg.student_id)
GROUP BY sg.group_id
answered Nov 14 '18 at 13:22
David Marabottini
1707
edited Nov 14 '18 at 13:28
answered Nov 14 '18 at 13:22
David Marabottini
1707
answered Nov 14 '18 at 13:22
David Marabottini
1707
answered Nov 14 '18 at 13:22
David Marabottini
1707
1707
add a comment |
add a comment |
2
--If you just need the group with the least members,
--Group By and Count will work to find the Group with the least members
--Then use select top 1 record and order by GroupCount Ascending
SELECT TOP 1 Group_Id, COUNT(Group_Id) AS [GroupCount]
FROM Student_Group
GROUP BY Group_Id
ORDER BY [GroupCount]
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
|
show 1 more comment
2
--If you just need the group with the least members,
--Group By and Count will work to find the Group with the least members
--Then use select top 1 record and order by GroupCount Ascending
SELECT TOP 1 Group_Id, COUNT(Group_Id) AS [GroupCount]
FROM Student_Group
GROUP BY Group_Id
ORDER BY [GroupCount]
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
|
show 1 more comment
2
2
2
--If you just need the group with the least members,
--Group By and Count will work to find the Group with the least members
--Then use select top 1 record and order by GroupCount Ascending
SELECT TOP 1 Group_Id, COUNT(Group_Id) AS [GroupCount]
FROM Student_Group
GROUP BY Group_Id
ORDER BY [GroupCount]
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
--If you just need the group with the least members,
--Group By and Count will work to find the Group with the least members
--Then use select top 1 record and order by GroupCount Ascending
SELECT TOP 1 Group_Id, COUNT(Group_Id) AS [GroupCount]
FROM Student_Group
GROUP BY Group_Id
ORDER BY [GroupCount]
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
answered Nov 14 '18 at 13:14
Ryan Wilson
3,5491518
3,5491518
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
|
show 1 more comment
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
1
1
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
How can you possibly answer this question when we have no idea what "least" is?
– DavidG
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
I think "least" is pretty self-explanatory
– Ryan Wilson
Nov 14 '18 at 13:16
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
That's not what the question asked, it asked "I need to find least group of student. "
– Ryan Wilson
Nov 14 '18 at 13:17
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG No where in the post does it say that.
– Ryan Wilson
Nov 14 '18 at 13:18
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
@DavidG I based my answer off of what the post does ask for, not some imaginary scenario Oh, look, the OP just verified my answer
– Ryan Wilson
Nov 14 '18 at 13:19
|
show 1 more comment
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Add some sample table data and the expected result - all as formatted text, not images. Also show us your best query attempt.
– jarlh
Nov 14 '18 at 13:12
What exactly would be the least group?
– Salman A
Nov 14 '18 at 13:13
What is your definition of "least"? Fewest members? Youngest age?
– DavidG
Nov 14 '18 at 13:13
Fewest group as student count. My English very bad. That's why I'm sorry
– Nasirli01
Nov 14 '18 at 13:20
Could you provide that sample data and expected results that Jarlh asked for, please?
– Larnu
Nov 14 '18 at 13:23