Select e.EMPLOYEEID, e.EMPLOYEEENAME, e.spouseid, s.SKILLTYPE, sl.SKILLID  from Employee_t e, SKILL_T s, SKILLSET_T sl
where e.EMPLOYEEID = sl.EMPLOYEEID AND s.SKILLID = sl.SKILLID and e.SPOUSEID is not null; --#1

Select * from DEPARTMENT_T d, Vendor_t v , EQUIPMENT_VENDOR_T el, EQUIPMENTS_T e
where
d.DEPARTMENTID = v.DEPARTMENTID and
e.EQUIPMENTID = el.EQUIPMENTID and
v.vendorid = el.VENDORID; --#2