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How to combine multiple rows of a table to a single row in sql server and join to another table

How can i merge the rows of a teachers qualification from its table to a single row and join it to another so i can search for a given condition to know if a teacher possesses the given degree/certification. Or is there a better approach other than the one i am trying to use? Thanks in advance. Second image.
SELECT
StaffTable.TeacherType,
StaffTable.StaffID,
TeacherQualificationsTable.YearOfGraduation,
TeacherQualificationsTable.SubjectMajorsCombination,
STUFF((SELECT
', ' + [DegreeObtained]
FROM
TeacherQualificationsTable FOR XML PATH('')),1,1,'') AS [DegreeObtained]
FROM
StaffTable
INNER JOIN
TeacherQualificationsTable
ON
StaffTable.StaffID = TeacherQualificationsTable.StaffID
INNER JOIN
AppointmentChronologyTable ON StaffTable.StaffID = AppointmentChronologyTable.StaffID
WHERE
(StaffTable.TeacherType = #TeacherType)
AND (StaffTable.StaffStatus = #StaffStatus)
AND DegreeObtained NOT CONTAINS ('B.Ed (Bachelor of Education)' , 'M.Ed (Master of Education)', 'G.D.E (Graduate Diploma in Education)')
ORDER BY
StaffTable.LastName,
StaffTable.FirstName,
StaffTable.MiddleName
I have a staffTable and a staffQualificationsTable (which will have multiple qualification entries for any given staff). Am required to check if some staff have some given qualifications eg 'B.Ed (Bachelor of Education)' , 'M.Ed (Master of Education)', 'G.D.E (Graduate Diploma in Education)' and return all the staff without it so they will be called to tender theirs or laid off. Please, i hope this is clearer.

How to compare/match values in sql server in two different tables

I need to have two tables.
First table (tblStudent) has fields student_id,firstname,lastname,class,rollno.
Second table(feeType) has fields class,admissionFee, tuitionFee etc.
I want to show the different fee for each class.
Like class 5 pays 600 as tuition fee where as class 6 will pay 700.
Eg. If class is 5 in first table then only the class 5 row in feeType should be shown ? How do I design tables as such? How do I join two tables? I will be using sql server 2008 and c# as frontend. Thanks from a novice.

This is the simplest type of INNER JOIN:
SELECT *
FROM tblStudent AS s
INNER JOIN feeType as f ON s.class = f.class

Your INNER JOIN would only return matching records,for non-matching records you could use a FULL JOIN and WHERE criteria to check.
SELECT *
FROM tblStudent AS s
INNER JOIN feeType as f ON s.class = f.class where s.class=null;
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This will list all the class names and their fees.
SELECT
s.class,
f.admissionFee as admission_fee,
f.tuitionFee as tuition_fee
FROM
tblStudent as s
JOIN feeType as f ON s.class = f.class
GROUP BY
s.class;
I hope this will help you to get the exact result set.

mySQL SELECT from one table, JOIN from another, then SELECT from the new one

I have an recruiting database that looks like this: Recruiter has many Students. Students have many "contacts" (how many times we have called/emailed etc.)
I want a recruiter to be able to see when the last time each student of theirs was contacted. I'm developing this app in c# and my database is mySQL.
My table names are employee, students, contact_his and the fields I want to join, given one employeeid are employee.idemployee + students.employee_id then join all of those to contact_his.students_id + students.idstudents. But I have no idea how joins work.. My current code looks like this, but it does not like it:
"SELECT students.* FROM admissions.students
WHERE students.employee_id='PASS VARIABLE HERE'
JOIN contact_his ON contact_his.students_id = s.idstudents
WHERE c.date = (SELECT MAX(date);"

SELECT s.*, MAX(h.date) last_contact
FROM students s
JOIN contact_his h ON h.students_id = s.idstudents
WHERE s.employee_id = 'PASS VARIABLE HERE'
GROUP BY s.idstudents

SQL Server: one simple question

So I have a table Transportation with columns: ClientIDAsSeller, ClientIDAsBuyer..
and a Client table with column ID (Primary key). My C# app gets a client IDs and sets in the Transportation table.
When I press execute result is null
What is problem how can I solve that?
SELECT
Clients.Name, Transportation.TransStart, Transportation.TransEnd
FROM
Transportation
INNER JOIN
Clients ON Transportation.ClientIDAsSeller = Clients.ID
AND Transportation.ClientIDAsBuyer = Clients.ID

You are likely excluding all possible result sets by only doing one join. You probably want to do:
SELECT
S.Name as SellerName
B.Name as BuyerName,
Transportation.TransStart,
Transportation.TransEnd
FROM Transportation
INNER JOIN
Clients S
ON
Transportation.ClientIDAsSeller = S.ID
INNER JOIN
Clients B
ON
Transportation.ClientIDAsBuyer = B.ID

No results from Join in Database?

i want to join two tables to get the Doctors name instead of the ID
SELECT Doctors.doct_name,
Shifts.shift_date,
Shifts.shift_day,
Shifts.shift_start,
Shifts.shift_end
FROM SHIFTS
JOIN Doctors ON Doctors.doct_id = Shifts.doct_id
the Column are shown but without any Results ,, no data from the database ?

your query looks ok.
try two seperate queries to validate the basic data:
select * from Doctors order by doct_id;
and
select * from Shifts order by doct_id;
see if you can manually spot the data issue:

Try a LEFT JOIN:
SELECT Doctors.doct_name,Shifts.shift_date,Shifts.shift_day,Shifts.shift_start,Shifts.shift_end
FROM SHIFTS
LEFT JOIN Doctors ON Doctors.doct_id = Shifts.doct_id

Try using left join and also try using Where clause with an id to check if there is really Doctors exist in both tables
SELECT Doctors.doct_name,Shifts.shift_date,Shifts.shift_day,Shifts.shift_start,Shifts.shift_end
FROM SHIFTS
LEFT JOIN Doctors ON Doctors.doct_id = Shifts.doct_id
OR
SELECT Doctors.doct_name,Shifts.shift_date,Shifts.shift_day,Shifts.shift_start,Shifts.shift_end
FROM SHIFTS
LEFT JOIN Doctors ON Doctors.doct_id = Shifts.doct_id
WHERE Doctors.doct_id = [insert doctors id here - doctors_id]