Queries

1:select * from all_objects

where object_name like '%JOB%'

and object_type = 'TABLES';

2:select * from emp

where hiredate>'01-JAN-81';

3:select * from emp

where hiredate>'01-JAN-81'

and sal>=3000;

4:select * from emp

where deptno in(20,30);

5:select * from emp

where ename like 'S%';

6:select * from emp

where ename like 'S%T'; name starts with S and ends with T

7:select * from emp

where mgr is null;

8:Select * Use of nvl

from emp

where nvl(mgr,0)=0;

9:Select *

from emp

where deptno=20

or deptno=100;

10:Select *

from emp

where deptno not in(20,30);

11:Select sal + 50 from emp;

12:Select * from emp

where (deptno=20

or deptno=30)

and sal>=3000;

13:Select * from emp

order by hiredate;

14:Select * from emp

order by hiredate desc;

15:Select * from emp

where deptno='&deptno';

16:Select * from emp

where deptno='&&deptno'

and job='&job';

17:select empno,ename,job,&column

from emp

where &condition

order by &column;

18:select sysdate

from dual;

19:select count (*) from emp;

20:select

initcap(ename),lower(ename),upper(ename),concat(ename,mgr),substr(ename,1,3),length(ename)

from emp;

21:select * from emp

where substr(job,6,8)='MAN';

or

select * from emp

where substr(job,6)='MAN';

22:select instr(job,'MAN')

from emp;

23:select substr(job,instr(job,'MAN'))

from emp;

24:select * from emp

where substr(job,instr(job,'MAN'))='MAN';

25:Select * from emp where substr(job,instr(job,'MAN'),instr(job,'MAN')+2)='MAN'

26:Select replace('SMITH','M','A')

from emp;

27:Select trim('H' from 'SMITH') new

from emp;

28:select ename,instr(ename,'A') new

from emp;

29:select trunc(99.99,-1),trunc(99.29,-1)

from dual;

30:select to_char(sysdate,'DD MONTH YYYY')

from dual;

31:select to_char(sysdate,'DD MONTH YYYY hh:mm:ss')

from dual;

32:select to_char(sysdate,'DD MONTH YYYY hh:mi:ss')

from dual;

33:select months_between(sysdate,hiredate) months

from emp;

34:select months_between(sysdate,hiredate) months,(sysdate-hiredate)/7 weeks

from emp;

35:select commission_pct, nvl(commission_pct ,.5) newcommission

from employees;

36:select first_name||' '||last_name "Full Name"

from employees;

37:select concat(concat(first_name,' '),last_name) "Full Name"

from employees;

or

select concat(first_name,concat(' ',last_name)) "Full Name"

from employees;

38:select 'Employee ' || concat(first_name,concat(' ',last_name))||' '|| 'belong''s to'||' '||

department_id

from employees;

39:SELECT upper(first_name),upper(concat(last_name,'_US')) new

from employees;

39:select round(to_date('25-JUL-03'),'MONTH') Important

from dual;

40:SELECT concat(first_name,last_name), TO_CHAR(hire_date,

'fmDdspth "of" Month RR fmHH24:MI:SS AM')

HIREDATE

FROM employees;

41:SELECT to_char(salary,'$00000')

from employees;

41:Select last_name, job_id, salary,

CASE job_id WHEN 'IT_PROG' THEN 1.10*salary

WHEN 'ST_CLERK' THEN 1.15*salary

WHEN 'SA_REP' THEN 1.20*salary

ELSE salary END "REVISED SALARY"

from employees;

42:Select count(*),department_id

from employees

group by department_id;

***********************Home Work*****************************************

1:Select last_name

from employees

where last_name like 'J%'

or last_name like 'K%'

or last_name like 'L%'

or last_name like 'M%';

or

Select last_name

from employees

where substr(last_name,1,1)in('J','K','L','M');

2:select * from employees

where job_id='ST_CLERK'

and hire_date > '31-DEC-1997';

3:select last_name,job_id,salary,commission_pct

from employees

where commission_pct is not null

order by commission_pct desc;

4:SELECT last_name,salary,commission_pct,

DECODE(commission_pct,null,'No','Yes')

REVISED_SALARY

FROM employees;

5:Select last_name,months_between(sysdate , hire_date)/12 "Length Of

Service",trunc(months_between(sysdate , hire_date)/12) "Years",

trunc(mod(months_between(sysdate , hire_date),12)) "Months"

from employees

order by months_between(sysdate , hire_date)/12 desc;

*****************************Joins***************************************

43:select

emp.first_name,emp.last_name,emp.employee_id,emp.department_id,dept.department_name

from employees emp,

departments dept

where emp.department_id=dept.department_id;

44:select e.first_name,e.last_name,e.employee_id,e.department_id,d.department_name

from employees e , departments d

where e.department_id=d.department_id

and e.department_id=20;

45:select e.first_name,e.last_name,e.employee_id,e.department_id,d.department_name,l.location_id

from employees e join departments d

on d.department_id=e.department_id

join locations l

on d.location_id=l.location_id;

46:select e.first_name,e.last_name,e.department_id,d.department_name

from employees e left outer join departments d

on e.department_id=d.department_id;

47:select e.first_name,e.last_name,e.department_id,d.department_name

from employees e right outer join departments d

on e.department_id=d.department_id;

48:Select * from employees

where job_id in

(select job_id from employees where employee_id=141);

49:select last_name,job_id,salary

from employees

where salary=(select min(salary) from employees);

******We cannot use group functions with where clause,we have to use having clause for this......

50:select department_id,avg(salary)

from employees

group by department_id

having avg(salary)>8000;

**************************Home Work**************************************

1:Select e.first_name,e.last_name,e.employee_id,m.employee_id

manager_id,m.first_name,m.last_name

from employees e join employees m

on (e.manager_id=m.employee_id);

2:select e.last_name employee,m.last_name manager,m.salary manager_salary,j.grade_level

from employees e join employees m

on (e.manager_id=m.employee_id)

join job_grades j

on m.salary BETWEEN j.lowest_sal AND j.highest_sal

where m.salary>15000;

3:select d.department_id "Department id" , d.department_name "Department

name",count(employee_id) "Number of employees",avg(salary) "Average

salary",f.last_name,f.salary,f.job_id

from employees e join departments d

on e.department_id=d.department_id

join employees f

on (f.department_id = e.department_id)

group by d.department_id ,d.department_name,f.job_id,f.last_name,f.salary

order by department_name;(Sure)

4:Select department_id,min(salary)

from employees

group by department_id

having avg(salary) = (Select max(avg(salary)) from employees

group by department_id);

5:select e.department_id "Department id" , d.department_name "Department

name",count(employee_id) "Number of employees"

from employees e join departments d

on e.department_id=d.department_id

group by e.department_id ,d.department_name

having count(employee_id)=(select max(count(employee_id)) from employees group by

department_id);

*************************Set Operators***********************************

51:select employee_id,department_id,job_id,null start_date,null end_date from employees

union

select employee_id,department_id,job_id,start_date,end_date from job_history

order by employee_id;

52:column page noprint

select 'I am learning',2 page from dual

union

select 'Oracle',1 page from dual

order by page;

***************************PL/SQL****************************************

1:set serveroutput on

begin

dbms_output.put_line('Hello World');

end;

2:Select 'father'||''''||'s day' New

from dual;

3:set serveroutput on

variable basic_percent number;

variable pf_percent number;

set autoprint on

declare

today date:=sysdate;

tomorrow today %type;

begin

:basic_percent:=45;

:pf_percent:=12;

tomorrow := sysdate+1;

dbms_output.put_line('Hello World');

dbms_output.put_line('Today is -' || today );

dbms_output.put_line('Tomorrow is -' || tomorrow );

end;

4:set serveroutput on

DECLARE

weight NUMBER(3) := 600;

message VARCHAR2(255) := 'Product 10012';

new_locn VARCHAR2(50) := 'Asia';

BEGIN

DECLARE

weight NUMBER(3) := 1;

message VARCHAR2(255) := 'Product 11001';

new_locn VARCHAR2(50) := 'Europe';

BEGIN

weight := weight + 1;

new_locn := 'Western ' || new_locn;

dbms_output.put_line('weight at position 1 is ' || weight);

dbms_output.put_line('Location at position 1 is ' ||new_locn);

END;

weight := weight + 1;

message := message || ' is in stock';

new_locn := 'Western ' || new_locn;

dbms_output.put_line('Message at position 2 is ' || message);

dbms_output.put_line('Weight at position 2 is ' || weight);

dbms_output.put_line('Location at position 2 is ' ||new_locn);

END;

5:set serveroutput on

DECLARE

customer VARCHAR2(50) := 'Womansport';

credit_rating VARCHAR2(50) := 'EXCELLENT';

name VARCHAR2(25) := 'Adidas';

BEGIN

DECLARE

customer NUMBER(7) := 201;

name VARCHAR2(25) := 'Unisports';

BEGIN

credit_rating :='GOOD';

dbms_output.put_line('Customer at position 1 is '||customer);

dbms_output.put_line('Name at position 1 is '||name);

dbms_output.put_line('Credit rating at position 1 is '||credit_rating);

END;

dbms_output.put_line('Customer at position 2 is '||customer);

dbms_output.put_line('Name at position 2 is '||name);

dbms_output.put_line('Credit rating at position 2 is '||credit_rating);

END;

6:set serveroutput on

--Creating bind variables

variable basic_percent number;

variable pf_percent number;

set autoprint on

declare

today date:=sysdate;

tomorrow today %type;

fname varchar2(15);

emp_sal number(10);

begin

/* Initializing the

bind variables */

tomorrow := sysdate+1;

SELECT first_name, salary

INTO fname, emp_sal FROM employees

WHERE employee_id=100;

:basic_percent:=.45 * emp_sal;

:pf_percent:=.12 * :basic_percent;

dbms_output.put_line('Hello '|| fname);

dbms_output.put_line('Your salary is ' || emp_sal );

dbms_output.put_line('Your contribution towards PF is ' || :pf_percent );

end;

7:set verify off

set serveroutput on

ACCEPT empno PROMPT 'Please enter your employee

id.'

--Creating bind variables

variable basic_percent number;

variable pf_percent number;

set autoprint on

declare

today date:=sysdate;

tomorrow today %type;

fname varchar2(15);

emp_sal number(10);

empno number(10)= &empno;

begin

/* Initializing the

bind variables */

tomorrow := sysdate+1;

SELECT first_name, salary,employee_id

INTO fname, emp_sal,empno FROM employees

WHERE employee_id=100;

:basic_percent:=.45 * emp_sal;

:pf_percent:=.12 * :basic_percent;

dbms_output.put_line('Hello '|| fname);

dbms_output.put_line('Your salary is ' || emp_sal );

dbms_output.put_line('Your contribution towards PF is ' || :pf_percent );

end;

8: set serveroutput on

declare

empno number(6) := &empno;

deptno number(6) := &deptno;

begin

EXECUTE IMMEDIATE ' create table employee_details as

select * from employees ';

end;

********************PL/SQL Practice 4************************************

1: set serveroutput on

declare

max_deptno number(10);

begin

select max(department_id)

into max_deptno from departments;

dbms_output.put_line('The maximum department no. is '||max_deptno);

end;

2:set serveroutput on

variable dept_id number;

set autoprint on

declare

max_deptno number;

dept_name departments.department_name%type:='Education';

begin

select max(department_id)

into max_deptno from departments;

:dept_id:=max_deptno + 10;

INSERT into departments(department_id,department_name, location_id) values( :dept_id, dept_name,

null);

dbms_output.put_line('The maximum department no. is '||max_deptno);

dbms_output.put_line('sql%rowcount gives '||sql%rowcount);

end;

/

select * from departments

where department_id=:dept_id;

3: set serveroutput on

variable dept_id number;

set autoprint on

declare

max_deptno number;

dept_name departments.department_name%type:='Education';

begin

select max(department_id)

into max_deptno from departments;

:dept_id:=max_deptno + 10;

INSERT into departments(department_id,department_name, location_id) values( :dept_id, dept_name,

null);

delete from departments

where department_id=1000;

update departments

set location_id=3000

where location_id=:dept_id;

/**dbms_output.put_line('The maximum department no. is '||max_deptno);

dbms_output.put_line('sql%rowcount gives '||sql%rowcount);**/

end;

/

select * from departments

where department_id=:dept_id;

delete from departments

where department_id=:dept_id;

***********************Practice 5****************************************

1: BEGIN

FOR i in 1..10 LOOP

IF i = 6 or i = 8 THEN

null;

ELSE

INSERT INTO messages(results)

VALUES (i);

END IF;

END LOOP;

COMMIT;

END;

/

select * from messages;

2:

****************************Practice 6***********************************

1:set serveroutput on

set verify off

define countryid = CA;

declare

country_record countries%Rowtype;

begin

select * into country_record from countries

where country_id = '&countryid';

dbms_output.put_line('country id: '||country_record.country_id);

dbms_output.put_line('country name: '||country_record.country_name);

dbms_output.put_line('region: '||country_record.region_id);

end;

2: