diff --git a/project/DDL.sql b/project/DDL.sql
new file mode 100644
index 0000000..9ef804f
--- /dev/null
+++ b/project/DDL.sql
@@ -0,0 +1,75 @@
+--drop tables & views
+drop view admission;
+drop table eligible;
+drop table student;
+drop table examinee;
+drop table profile;
+drop table applicant;
+drop table department;
+
+
+--profile
+create table profile(
+			reg_no varchar(30) primary key,
+			hsc_roll varchar(30) not null,
+			name varchar(30) not null, 
+			father_name varchar(30) not null,
+			mother_name varchar(30) not null,
+			birth_date date not null,
+			address varchar(30) not null,
+			email varchar(30) unique not null,
+			religion varchar(30) not null check (religion in ('Islam','Hindu','Budhha','Christ'))
+);
+
+--applicant
+create table applicant(
+			applicant_id varchar(30) primary key,
+			exam_venue varchar(30) not null,
+			apply_time timestamp not null
+);
+
+--eligible
+create table eligible(
+			reg_no varchar(30),
+			applicant_id varchar(30),
+			hsc_mark numeric(3) not null check (hsc_mark<=600),
+			hsc_gpa numeric(3,2) not null check(hsc_gpa<=5.00),
+			ssc_gpa numeric(3,2) not null check(ssc_gpa<=5.00), 
+			eligibility varchar(5) not null check(eligibility in ('yes','no')),
+			foreign key (reg_no) references profile (reg_no),
+			foreign key (applicant_id) references applicant (applicant_id)
+			on delete cascade
+);
+
+--examinee
+create table examinee(
+			applicant_id varchar(30),
+			phy_mark numeric(3) not null check (phy_mark<=150),
+			chem_mark numeric(3) not null check (chem_mark<=150),
+			math_mark numeric(3) not null check (math_mark<=150),
+			eng_mark numeric(3) not null check (eng_mark<=50),
+			gpa_mark numeric(3) not null check (gpa_mark<=100),
+			total_mark numeric(3) check (total_mark<=600),
+			merit_place numeric(5) primary key,
+			foreign key (applicant_id) references applicant(applicant_id)
+			on delete cascade
+);
+
+--department
+create table department(
+			roll_no varchar(30) primary key,
+			dept_name varchar(30) not null,
+			dept_id numeric(2) not null,
+			faculty varchar(30) not null
+);
+
+--student
+create table student(
+			merit_place numeric(5) not null,
+			roll_no varchar(30) not null,
+			dept_choice varchar(30) not null,
+			priority numeric(2) not null,
+			foreign key (merit_place) references examinee(merit_place),
+			foreign key (roll_no) references department(roll_no)
+			on delete cascade
+);
diff --git a/project/DML.sql b/project/DML.sql
new file mode 100644
index 0000000..2b480d3
--- /dev/null
+++ b/project/DML.sql
@@ -0,0 +1,59 @@
+--pagesize & linesize
+set pagesize 1500;
+set linesize 300;
+
+-- select
+select * from profile;
+select name from profile;
+
+--update & delete
+INSERT INTO applicant VALUES ('A016', 'Venue1', timestamp '2023-05-20 09:00:00');
+update applicant set exam_venue = 'Venue5' where applicant_id = 'A016';
+delete from applicant where applicant_id = 'A016';
+
+--union, intersect, except
+select applicant_id,apply_time from applicant where extract (hour from apply_time)>10 
+union
+select applicant_id,apply_time from applicant where extract (hour from apply_time)<16;  
+
+--with clause
+with avg_number(hsc_mark) as (select avg(hsc_mark) from eligible)
+select * from eligible,avg_number where eligible.hsc_mark > avg_number.hsc_mark; 
+
+--aggregate
+select count (distinct hsc_gpa) as gpa_hsc from eligible; 
+select max (total_mark) as exam_marks from examinee; 
+
+--group by & having
+select faculty,count(distinct dept_name) as number_of_dept from department group by faculty;
+select faculty,count(distinct dept_name) as number_of_dept from department group by faculty having count(dept_name) > 2;
+
+--nested subquery
+select name from profile where reg_no = 
+(select reg_no from eligible where applicant_id =
+(select applicant_id from examinee where merit_place = 1 ));
+
+--set membership
+select name from profile where reg_no in
+(select reg_no from eligible where applicant_id in 
+(select applicant_id from examinee where merit_place >=1 and merit_place <=5 ));
+
+--string
+select dept_name,faculty from department where dept_name like '%Engineer%'; 
+
+--join operations
+select applicant_id,total_mark,merit_place,roll_no from examinee natural join student order by merit_place asc;
+select name,merit_place from profile join eligible on profile.reg_no = eligible.reg_no join examinee on eligible.applicant_id = examinee.applicant_id where merit_place<4 order by merit_place asc; 
+
+--views
+create view admission as select name,p.reg_no,a.applicant_id,hsc_gpa,ssc_gpa,gpa_mark,phy_mark,math_mark,chem_mark,eng_mark,total_mark,
+e.merit_place,s.roll_no,dept_name,dept_id,faculty from profile p join eligible eg  on p.reg_no = eg.reg_no
+join applicant a on a.applicant_id = eg.applicant_id
+join examinee e on e.applicant_id = a.applicant_id
+join student s on s.merit_place = e.merit_place
+join department d on d.roll_no = s.roll_no; 
+<<<<<<< HEAD
+select * from admission;
+=======
+select * from admission;
+>>>>>>> d3c61a4cb8141bb22c264f82bf7fb81d38d7b22f
diff --git a/project/INSERT_DATA.sql b/project/INSERT_DATA.sql
new file mode 100644
index 0000000..6a9af9c
--- /dev/null
+++ b/project/INSERT_DATA.sql
@@ -0,0 +1,89 @@
+--INSERT INTO profile (reg_no, hsc_roll, name, father_name, mother_name, birth_date, address, email, religion) VALUES
+INSERT INTO profile VALUES ('R001', 'HSC001', 'John Doe', 'Michael Doe', 'Jane Doe', date '2000-01-01', '123 Main St', 'johndoe@example.com', 'Islam');
+INSERT INTO profile VALUES ('R002', 'HSC002', 'Jane Smith', 'David Smith', 'Mary Smith', date '1998-05-15', '456 Elm St', 'janesmith@example.com', 'Hindu');
+INSERT INTO profile VALUES ('R003', 'HSC003', 'Robert Johnson', 'Thomas Johnson', 'Sarah Johnson', date '1999-08-22', '789 Oak St', 'robertjohnson@example.com', 'Budhha');
+INSERT INTO profile VALUES ('R004', 'HSC004', 'Emily Davis', 'Daniel Davis', 'Laura Davis', date '2001-03-10', '321 Pine St', 'emilydavis@example.com', 'Christ');
+INSERT INTO profile VALUES ('R005', 'HSC005', 'Michael Wilson', 'John Wilson', 'Emily Wilson', date '2002-07-17', '567 Maple St', 'michaelwilson@example.com', 'Islam');
+INSERT INTO profile VALUES ('R006', 'HSC006', 'Sarah Thompson', 'James Thompson', 'Jennifer Thompson', date '1999-11-05', '890 Cedar St', 'sarahthompson@example.com', 'Hindu');
+INSERT INTO profile VALUES ('R007', 'HSC007', 'Matthew Lee', 'Brian Lee', 'Karen Lee', date '1999-02-28', '234 Birch St', 'matthewlee@example.com', 'Budhha');
+INSERT INTO profile VALUES ('R008', 'HSC008', 'Olivia Martinez', 'Joseph Martinez', 'Maria Martinez', date '2000-06-12', '678 Oak St', 'oliviamartinez@example.com', 'Christ');
+INSERT INTO profile VALUES ('R009', 'HSC009', 'Christopher Harris', 'William Harris', 'Jessica Harris', date '2000-09-20', '912 Pine St', 'christopherharris@example.com', 'Islam');
+INSERT INTO profile VALUES ('R010', 'HSC010', 'Ava Clark', 'Christopher Clark', 'Samantha Clark', date '2001-12-08', '345 Maple St', 'avaclark@example.com', 'Hindu');
+INSERT INTO profile VALUES ('R011', 'HSC011', 'David Rodriguez', 'Andrew Rodriguez', 'Elizabeth Rodriguez', date '1998-04-18', '567 Cedar St', 'davidrodriguez@example.com', 'Budhha');
+INSERT INTO profile VALUES ('R012', 'HSC012', 'Sophia Walker', 'Jason Walker', 'Kimberly Walker', date '1999-07-25', '890 Birch St', 'sophiawalker@example.com', 'Christ');
+INSERT INTO profile VALUES ('R013', 'HSC013', 'Daniel Green', 'Mark Green', 'Patricia Green', date '2002-10-14', '123 Oak St', 'danielgreen@example.com', 'Islam');
+INSERT INTO profile VALUES ('R014', 'HSC014', 'Mia Lewis', 'Robert Lewis', 'Susan Lewis', date '2001-01-31', '456 Pine St', 'mialewis@example.com', 'Hindu');
+INSERT INTO profile VALUES ('R015', 'HSC015', 'Andrew Hill', 'David Hill', 'Nancy Hill', date '2000-06-27', '789 Maple St', 'andrewhill@example.com','Islam');
+
+--INSERT INTO applicant (applicant_id, exam_venue, apply_time) VALUES
+INSERT INTO applicant VALUES ('A001', 'Venue1', timestamp '2023-05-18 09:00:00');
+INSERT INTO applicant VALUES ('A002', 'Venue2', timestamp '2023-05-18 10:15:00');
+INSERT INTO applicant VALUES ('A003', 'Venue1', timestamp '2023-05-18 11:30:00');
+INSERT INTO applicant VALUES ('A004', 'Venue3', timestamp '2023-05-18 13:00:00');
+INSERT INTO applicant VALUES ('A005', 'Venue2', timestamp '2023-05-18 14:30:00');
+INSERT INTO applicant VALUES ('A006', 'Venue4', timestamp '2023-05-18 15:45:00');
+INSERT INTO applicant VALUES ('A007', 'Venue3', timestamp '2023-05-18 17:00:00');
+INSERT INTO applicant VALUES ('A008', 'Venue5', timestamp '2023-05-19 09:30:00');
+INSERT INTO applicant VALUES ('A009', 'Venue2', timestamp '2023-05-19 10:45:00');
+INSERT INTO applicant VALUES ('A010', 'Venue1', timestamp '2023-05-19 12:00:00');
+INSERT INTO applicant VALUES ('A011', 'Venue4', timestamp '2023-05-19 13:15:00');
+INSERT INTO applicant VALUES ('A012', 'Venue5', timestamp '2023-05-19 14:30:00');
+INSERT INTO applicant VALUES ('A013', 'Venue3', timestamp '2023-05-19 15:45:00');
+INSERT INTO applicant VALUES ('A014', 'Venue2', timestamp '2023-05-19 17:00:00');
+INSERT INTO applicant VALUES ('A015', 'Venue1', timestamp '2023-05-20 09:00:00');
+
+--INSERT INTO eligible INSERT INTO eligible VALUES (reg_no, applicant_id, hsc_mark, hsc_gpa, ssc_gpa, eligibility) VALUES
+INSERT INTO eligible VALUES ('R001', 'A001', 580, 4.50, 4.00, 'yes');
+INSERT INTO eligible VALUES ('R002', 'A002', 550, 4.00, 3.50, 'yes');
+INSERT INTO eligible VALUES ('R003', 'A003', 600, 5.00, 4.50, 'yes');
+INSERT INTO eligible VALUES ('R004', 'A004', 540, 3.75, 3.25, 'no');
+INSERT INTO eligible VALUES ('R005', 'A005', 590, 4.80, 4.20, 'yes');
+INSERT INTO eligible VALUES ('R006', 'A006', 510, 3.50, 3.00, 'yes');
+INSERT INTO eligible VALUES ('R007', 'A007', 570, 4.30, 3.75, 'yes');
+INSERT INTO eligible VALUES ('R008', 'A008', 480, 3.00, 2.75, 'no');
+INSERT INTO eligible VALUES ('R009', 'A009', 560, 4.20, 3.50, 'yes');
+INSERT INTO eligible VALUES ('R010', 'A010', 520, 3.80, 3.25, 'yes');
+INSERT INTO eligible VALUES ('R011', 'A011', 590, 4.80, 4.20, 'yes');
+INSERT INTO eligible VALUES ('R012', 'A012', 500, 3.25, 2.75, 'no');
+INSERT INTO eligible VALUES ('R013', 'A013', 550, 4.00, 3.50, 'yes');
+INSERT INTO eligible VALUES ('R014', 'A014', 580, 4.50, 4.00, 'yes');
+INSERT INTO eligible VALUES ('R015', 'A015', 530, 3.60, 3.00, 'yes');
+
+--INSERT INTO examinee (applicant_id, phy_mark, chem_mark, math_mark, eng_mark, gpa_mark, total_mark, merit_place) VALUES
+INSERT INTO examinee VALUES ('A001', 120, 140, 145, 40, 85, 530, 2);
+INSERT INTO examinee VALUES ('A002', 110, 130, 135, 38, 75, 488, 6);
+INSERT INTO examinee VALUES ('A003', 145, 150, 150, 48, 95, 588, 1);
+INSERT INTO examinee VALUES ('A005', 100, 120, 125, 35, 90, 470, 8);
+INSERT INTO examinee VALUES ('A006', 130, 145, 140, 42, 65, 522, 4);
+INSERT INTO examinee VALUES ('A007', 90, 110, 115, 32, 80, 427, 10);
+INSERT INTO examinee VALUES ('A009', 115, 135, 130, 37, 77, 494, 5);
+INSERT INTO examinee VALUES ('A010', 80, 100, 105, 30, 71, 386, 11);
+INSERT INTO examinee VALUES ('A011', 105, 125, 120, 36, 90, 476, 7);
+INSERT INTO examinee VALUES ('A013', 95, 115, 110, 33, 75, 428, 9);
+INSERT INTO examinee VALUES ('A014', 125, 140, 135, 41, 85, 526, 3);
+INSERT INTO examinee VALUES ('A015', 85, 105, 100, 29, 66, 385, 12);
+
+--INSERT INTO department (roll_no, dept_name, dept_id, faculty) VALUES
+INSERT INTO department VALUES ('R001', 'Computer Science', 07, 'Faculty of Science');
+INSERT INTO department VALUES ('R002', 'Electrical Engineering', 01, 'Faculty of Engineering');
+INSERT INTO department VALUES ('R003', 'Mechanical Engineering', 05, 'Faculty of Engineering');
+INSERT INTO department VALUES ('R004', 'Chemistry', 15, 'Faculty of Science');
+INSERT INTO department VALUES ('R005', 'Physics', 13, 'Faculty of Science');
+INSERT INTO department VALUES ('R006', 'English Literature', 19, 'Faculty of Arts');
+INSERT INTO department VALUES ('R007', 'Business Administration', 17, 'Faculty of Business');
+INSERT INTO department VALUES ('R008', 'Mathematics', 09, 'Faculty of Science');
+INSERT INTO department VALUES ('R009', 'Civil Engineering', 03, 'Faculty of Engineering');
+INSERT INTO department VALUES ('R010', 'Biology', 11, 'Faculty of Science');
+
+--INSERT INTO student (merit_place, roll_no, dept_choice, priority) VALUES
+INSERT INTO student VALUES (1, 'R001', 'Computer Science', 1);
+INSERT INTO student VALUES (2, 'R002', 'Electrical Engineering', 1);
+INSERT INTO student VALUES (3, 'R003', 'Mechanical Engineering', 1);
+INSERT INTO student VALUES (4, 'R004', 'Chemistry', 2);
+INSERT INTO student VALUES (5, 'R005', 'Physics', 2);
+INSERT INTO student VALUES (6, 'R006', 'English Literature', 3);
+INSERT INTO student VALUES (7, 'R007', 'Business Administration', 5);
+INSERT INTO student VALUES (8, 'R008', 'Mathematics', 4);
+INSERT INTO student VALUES (9, 'R009', 'Civil Engineering', 1);
+INSERT INTO student VALUES (10, 'R010', 'Biology', 6);
+
diff --git a/project/PLSQL.sql b/project/PLSQL.sql
new file mode 100644
index 0000000..7983458
--- /dev/null
+++ b/project/PLSQL.sql
@@ -0,0 +1,137 @@
+--variable declare and print value
+set serveroutput on
+declare
+roll department.roll_no%type;
+dept department.dept_name%type;
+faculty department.faculty%type;
+begin
+select dept_name,roll_no,faculty into dept,roll,faculty from department where dept_id=07;
+dbms_output.put_line('Roll: '||roll||' Dept: '||dept||' Faculty: '||faculty);
+end;
+/
+
+--insert and set default value
+set serveroutput on
+declare
+roll department.roll_no%type:='R016';
+dept department.dept_name%type:='CSE';
+faculty department.faculty%type:='EEE';
+id department.dept_id%type:='07';
+begin
+insert into department VALUES(roll,dept,id,faculty);
+end;
+/
+select * from department where roll_no='R016';
+
+--row type
+set serveroutput on
+declare
+dept_row department%rowtype;
+begin
+select roll_no, dept_name, dept_id, faculty into dept_row
+from department where roll_no='R010';
+dbms_output.put_line('Roll: '||dept_row.roll_no||' Dept: '||dept_row.dept_name||' Faculty: '||dept_row.faculty);
+end;
+/
+
+--cursor and row count with while loop
+set serveroutput on
+declare
+cursor c is select roll_no,dept_name from department;
+dept_row department%rowtype;
+begin
+open c;
+fetch c into dept_row.roll_no,dept_row.dept_name;
+while c%found loop
+dbms_output.put_line('Roll: '||dept_row.roll_no||' Dept: '||dept_row.dept_name);
+dbms_output.put_line('Count: '||c%rowcount);
+fetch c into dept_row.roll_no,dept_row.dept_name;
+end loop;
+close c;
+end;
+/
+
+--if/elseif/else
+set serveroutput on
+declare
+cursor c is select reg_no,hsc_mark from eligible;
+e_row eligible%rowtype;
+begin
+open c;
+fetch c into e_row.reg_no, e_row.hsc_mark;
+while c%found loop
+if e_row.hsc_mark>540
+then dbms_output.put_line('Reg_no: '||e_row.reg_no||' HSC_Mark: '||e_row.hsc_mark||'Student rating: Outstanding');
+elsif e_row.hsc_mark>500
+then dbms_output.put_line('Reg_no: '||e_row.reg_no||' HSC_Mark: '||e_row.hsc_mark||'Student rating: Good');
+else
+dbms_output.put_line('Reg_no: '||e_row.reg_no||' HSC_Mark: '||e_row.hsc_mark||'Student rating: Medium');
+end if;
+dbms_output.put_line('Count: '||c%rowcount);
+fetch c into e_row.reg_no, e_row.hsc_mark;
+end loop;
+close c;
+end;
+/
+
+--procedure
+create or replace procedure proc(
+    merit in  examinee.merit_place%type,
+    id out examinee.applicant_id%type,
+    marks out examinee.total_mark%type
+) is var varchar(30);
+begin
+select applicant_id,total_mark into id,marks from examinee where merit_place=merit;
+end;
+/
+
+set serveroutput on
+declare
+merit examinee.merit_place%type:=1;
+id examinee.applicant_id%type;
+mark examinee.total_mark%type;
+begin
+proc(merit,id,mark);
+dbms_output.put_line('Applicant_id: '||id||' Marks: '||mark||' Merit_place: '||merit);
+end;
+/
+
+--function
+create or replace function fun(
+    roll in department.roll_no%type
+) return varchar as faculty department.faculty%type;
+begin
+select faculty into faculty from department where roll_no=roll;
+return faculty;
+end;
+/
+
+set serveroutput on
+declare
+roll  department.roll_no%type:='R001';
+faculty department.faculty%type;
+dept department.dept_name%type;
+cursor c is select dept_name,faculty from department where faculty= fun(roll); 
+begin
+open c;
+fetch c into dept,faculty;
+while c%found loop
+dbms_output.put_line('Dept: '||dept||' Faculty: '||faculty);
+fetch c into dept,faculty;
+end loop;
+close c;
+end;
+/
+
+--drop procedur / function
+drop procedure proc;
+drop function fun;
+
+--trigger
+CREATE or REPLACE TRIGGER update_total_mark
+BEFORE INSERT OR UPDATE ON examinee
+REFERENCING OLD AS O NEW AS n 
+FOR EACH ROW
+BEGIN
+    n.total_mark := n.phy_mark + n.chem_mark + n.math_mark + n.eng_mark + n.gpa_mark;
+END;
diff --git a/project/marks.sql b/project/marks.sql
new file mode 100644
index 0000000..52639f0
--- /dev/null
+++ b/project/marks.sql
@@ -0,0 +1,26 @@
+create or replace procedure printMark(elg in eligible.eligibility%type) as 
+cursor mark is select applicant_id,phy_mark,chem_mark,math_mark from examinee where applicant_id in (select applicant_id from eligible where eligibility=elg);
+id examinee.applicant_id%type;
+pM examinee.phy_mark%type;
+cM examinee.chem_mark%type;
+mM examinee.math_mark%type;
+begin
+open mark;
+fetch mark into id,pM,cM,mM;
+while mark%found loop
+dbms_output.put_line('Applicant id: '||id||'  Phy_Mark: '||pM||'    Chem_Mark: '||cM||'    Math_Mark: '||mM);
+fetch mark into id,pM,cM,mM;
+end loop;
+close mark;
+end;
+/
+
+set serveroutput on
+declare
+elg eligible.eligibility%type:='yes';
+begin
+printMark(elg);
+end;
+/
+
+select applicant_id,eligibility from eligible;
\ No newline at end of file