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This is the query image:
This result should appear as follows:
This is my query: select id, name, total where student.id= marks.sutdent_id
You should group on the student id and name and sum the marks:
SELECT s.id, s.name, SUM(e.marks) AS total
FROM student s
JOIN exam e ON s.id = e.stud_id
GROUP BY s.id, s.name
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how to rank each country based on number of people in SQL.
Try
SELECT * FROM (
SELECT country, count(people) as count FROM your_table GROUP BY country
) ORDER BY count DESC
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I need help regarding SQL joins, i am trying join two tables as shown in below images
I guess you can try the below query to get the desired result -
SELECT CASE WHEN CT.partner2 IS NULL
THEN C.partner_id
ELSE CT.partner1
END Partner1,
CT.partner2,
C.Type,
C.Company_name,
C.First_name,
CT.city,
CT.Phone,
CT.Email
FROM CUSTOMER C
LEFT JOIN CONTACTS CT ON C.partner_id = CT.partner2
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Answer should be McDormand
here is the movie table
here is the acts table
You can try the below - DEMO Here
SELECT a.actor
FROM movies m
INNER JOIN actors a ON a.title = m.title
WHERE m.director = 'Coen'
group by a.actor
having count(*)=(select count(distinct title) from movies where director = 'Coen')
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I have a table name customers with two columns, case id and owner. I need to write a query to select random 5 caseids for every name in owner column.please help
For a start, you need something like:
SELECT TOP 5
ID,
[Case ID],
[Owner],
Rnd(-Timer()*[ID]) AS RandomRecord
FROM
[Cases]
ORDER BY
Rnd(-Timer()*[ID]);
to be used as a subquery filtered on OwnerID of your Owners' table.
I once posted an article on this with a lot more details:
Random Rows in Microsoft Access
You can use in:
select t.*
from t
where t.id in (select top 5 id
from t as t2
where t2.name = t.name
order by Rnd(-Timer()*[ID])
);
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How do I write a query in sql to update the salary of each instructor to 10,000 times the number of course sections they have taught given the schema below?
Here is the schema of the database:
Query:
UPDATE instructor
SET salary = 10000 *
(SELECT COUNT(*) FROM section s
JOIN teaches t ON s.sec_id = t.sec_id
JOIN instructor i ON t.id = i.id
WHERE i.id = instructor.id);