sql queries questions

Select st.StudentID, Ex.Result from student st, Exam as Ex where st.studentID = Ex. StudentID

SELECT E.EmpFname, E.EmpLname, P.EmpPosition 
FROM EmployeeInfo E INNER JOIN EmployeePosition P ON
E.EmpID = P.EmpID AND P.EmpPosition IN ('Manager');

SELECT SUBSTRING(Address, 1, CHARINDEX('(',Address)) FROM EmployeeInfo;