Consider the relations
EMP(ENO,ENAME,AGE,BASIC_SALARY)
WORK_IN(ENO,DNO)
DEPT(DNO,DNAME,CITY)
Express the following queries in SQL
(i) Find names of employees who work in a deptt. in Delhi.
(ii) Get the deptt. number in which more than one employee is working.
(iii) Find name of employee who earns highest salary in ‘HR' department.

(i) select ENAME from EMP, WORK_IN, DEPT where EMP.ENo= WORK_IN.ENO and WORK_IN.DNO= DEPT.DNO and CITY= ‘Delhi';
(ii) select DNO from WORK_IN group by DNO having count(*) >1
(iii) select ENAME from EMP e where BASIC_SALARY >= (select max(BASIC_SALARY) from DEPT,WORK_IN where DNAME = ‘HR' and e.ENO = WORK_IN.ENO and WORK_IN. DNO= DEPT.DNO)