126.
Display ename,sal and deptno for each employee who earn a sal greater than the
avg of their department order by deptno
select
ename,sal,deptno from emp e where sal >(select avg(sal) from emp where
deptno=e.deptno) order by deptno;;
127.
Display the department where there are no employees;
select
deptno,dname from dept where deptno not in(select distinct(deptno) from emp);
128.
Display the dept no with highes tannual remuneration bill as compensation.
select
deptno,sum(sal) from emp group by deptno having sum(sal) = (select
mac(sum(sal)) from emp group by deptno);
129.
In which year did most people join the company. Diaplay the year and number of
employees(hey try out)
select
max(aa) from (select count(*) aa, to _char(hiredate,'yyyy') dd from emp group
by to_char(hiredate,'yyyy'))
130.
Display avg sal figure for the dept
select
deptno,avg(sal) from emp group byu deptno;
131.
write a query of display against the row of the most recently hired employee.
Display ename hire date and column
max
date showing.
select
empno, hiredate from emp where hiredate=(select max (hiredate) from emp);
132.
Display employees who can earn more than lowest sal in dept no 30
select
* from emp where sal>(select min(sal) from deptno=30);
133.
Find employees who can earn more than every employees in dept no 30
select
* from emp where sal>(select max(sal) from emp where deptno=30);
select
* from emp where sal>all(select sal from emp where deptn0=30);
134.
select dept name dept no and sum of sal
break
on deptno on dname;
select
e.deptno,d.dname,sal fdrom emp e, dept d
where
e.deptno=d.deptno
order
by e.deptno;
135.
find out avg sal and ave total remainders for each job type
136.
find all dept's which have more than 3 employees.
select
deptno from emp group by deptno having count(*)>3;
137.
Display the half of the enames in upper case and remaining lowe case.
select
concat(upper(substr(ename,0,lengh(ename)/2)), lower
(substr(ename,lengh(ename)/2+1,lenght(ename)))) from emp;
138.
select ename if ename exists more than once.
select
distinct(ename) from emp e where ename in(select ename from emp where
e.empno<>empno);
139.
Display all enames in reverse order
select
ename from emp order by ename desc
140.
Display those employee whose joining of month and grade is equal.
select
empno,ename from emp e,salgrade s where e.sal between s.losal and s.hisal and
to_char(hiredate,'mm')=grade;
141.
Display those employee whose joining date is avaiable in dept no
select
* from emp where to_char(hiredate,'dd')=deptno;
142.
Display those employee name as follows A allen, B black
select
substr(ename,1,1)||' ' || ename from emp;
143.
List out the employees ename,sal pf from emp
select
ename,sal,sal*15/100 pf from emp
144.
Display RSPS from emp without using updating,inserting
Create
table emp with only one column empno
create
table emp(empno number(5));
145.
Add this column to emp table ename varchar(20)
alter
table emp add ename varchar2(20) not null;
146.
opps I forgot to give the primary Key constrains. Add it now.
Alter
table emp add constrains emp_empno primary key(empno);
147. now increase the length of ename column to 30
characters,
alter
table emp modify ename varchar2(30);
148.
Add salary column to emp table.
alter
table emp add sal number(7,2);
149.
I wan tto give a validation saying that sal cannot be greater 10,000(note give
a name to this comumn)
Alter
table emp add constraints emp_sal_check check(sal<10000);
150.
For the time begin I have decided that i will not impose this validation. My
boss has agreed to pay more than 10,0000
Alter
table emp disable constrainsts emp_sal_check;
151.
My boss has changed his mind. now he doesn't want to pay more than 10,000. so
revoke that salary constraints
Alter
table emp enable constraints emp_sal_check;
152.
Add column called a s mgr to your emp table.
Alter
table emp add mgr number(5);
153.
Oh ths column should be related to empno. give a command to add this constrains
Alter
table emp add constraint emp_mgr foreign key(empno);
154.
Add dept no column to your emp table
alter
table emp add deptno number(3);
155.
This dept no column should be related to deptno column to dept table
alter
table emp1 add constraints emp1_deptno foreign key(deptno) referemces
dept(deptno);
156.
Create table called as new emp. using single command create this table as welll
as to get data into this table (use create table as)
create
table newemp as select * from emp;
157.
create table called as newemp. The table should contains only empno,ename,dname
create
table newemp as select empno,ename,dname from emp e, dept d where
e,deptno=d.deptno;
158.
Delete the rows of employees who are workingin the company for more than 3
years
delete
from emp where floor(susdate-hiredaye)>2*365;
159.
Provide a commission to employees who are not earning any commission.
update
emo set comm=300 where comm is null;
160.
If any employees has commsision his commsision should be incremented by 10% of
his salary
update
emp set comm=comm*10/100 where comm is not null;
161.
Display employees name and department name for each employee
select
ename,dename from emp e,dept d where e.deptno=d.deptno
162.
DIsplay employee number, name and location of the department in which he is
working
select
empno,ename, loc from emp e, dept d where e.deptno=d.deptno
163.
display ename, dname even if the employees in a particular department(use outer
join)
select
ename,dname from emp e,dept d where e.deptno(+)=d.deptno;
164.
Display employee name and his manager name
select
e.ename,m.ename from emp e, emp m where e.mgr=m.empno;
165.
Display the department name along with total salary in each department.
select
deptno,sum(sal) from emp group by deptno;
166.Display
the department name and total number of employees in each department
select
deptno,count(*) from emp group by deptno;
167.
Alter table emp1 add constrains emp1_deptno foreign key(deptno) references
dept(deptno)
delete
from emp where job name in clerk
carscedMgan_ru-Berkeley Jason Brandt https://wakelet.com/wake/ZwHBMnJID_jW9VP2pxbVv
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