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DDL.sql

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+show user
+select table_name from user_tables;
+
+drop table Admitted_Patients;
+drop table Appointment;
+drop table medical_history;
+drop table Patient;
+drop table Doctor;
+show linesize;
+show pagesize;
+set linesize 500;
+set pagesize 500;
+
+--DemoTables for showing on delete cascade
+
+create table Doctor
+  (
+  name varchar(10) not null,
+  id number primary key check (id>=0),
+  unit varchar(20) not null,
+  Constraint UnitIn check
+  (unit in ('burn','surgery')
+  )
+  );
+desc Doctor;
+alter table Doctor add experience varchar(10);
+alter table Doctor add age varchar(10);
+desc Doctor;
+alter table Doctor modify age number;
+desc Doctor;
+alter table Doctor modify age number check (age>=20 and age<=80);
+desc Doctor;
+alter table Doctor rename column id to doc_id;
+desc Doctor;
+alter table Doctor rename column doc_id to id;
+desc Doctor;
+alter table Doctor rename to DemoDoctor;
+desc DemoDoctor;
+alter table DemoDoctor rename to Doctor;
+desc Doctor;
+alter table Doctor drop column experience;
+desc Doctor;
+insert into Doctor values ('abc','1','burn','20');
+select * from Doctor;
+--does not satisfy constraint
+--insert into Doctor values (null,'1','burn','20');
+--insert into Doctor (id,unit,age) values ('2','burn','20');
+--insert into Doctor values ('abc','3','burn','10');
+--insert into Doctor values ('abc','3','Neurology','10');
+--select * from Doctor;
+
+create table admitted_patients
+  (doctor_id number PRIMARY KEY,
+   patient_name varchar(20),
+   foreign key (doctor_id) references Doctor (id)
+   on delete cascade);
+desc admitted_patients;
+
+insert into admitted_patients values ('1','abc');
+select * from admitted_patients;
+delete from Doctor where id=1;
+select * from Doctor;
+select * from admitted_patients;
+drop table admitted_patients;
+drop table Doctor;
+
+
+--Doctor
+create table Doctor
+(
+     doctor_id int,
+     doctor_name varchar(30) not null,
+     unit varchar(30) not null,
+     email varchar(30) unique not null,
+     phone_no varchar(15) unique not null,
+     primary key (doctor_id),
+     Constraint UnitIn check
+     (unit in ('burn','surgery','ICU','emergency medicine','NICU','neurology','nephrology',
+     'cardiology','orthopedics','psychiatry','pediatrics','oncology','CCU')
+     )
+);
+
+desc Doctor;
+
+
+--Patient
+create table Patient
+(
+patient_id int primary key,
+patient_name varchar(30) not null,
+email varchar(30) unique,
+phone_no varchar(15) unique not null,
+age number check(age>=0),
+gender varchar(2) not null
+);
+desc patient;
+
+--alter table
+alter table patient add gender1 varchar(2);
+desc patient;
+alter table patient modify gender1 number;
+desc patient;
+alter table patient rename column gender1 to gender2;
+desc patient;
+alter table patient drop column gender2;
+desc patient;
+
+
+--medical_history
+Create table medical_history
+(
+patient_id int not null ,
+condition varchar(50) not null,
+treatment_history varchar (50),
+foreign key (patient_id) references Patient
+);
+desc medical_history;
+
+
+--Admitted_Patients
+Create table Admitted_Patients
+(
+doctor_id int not null,
+patient_id int ,
+ward varchar(30) not null,
+condition varchar(50) not null,
+admit_date Date not null,
+release_date Date,
+primary key(patient_id),
+foreign key (doctor_id) references Doctor,
+foreign key (patient_id) references Patient (patient_id),
+CONSTRAINT duration CHECK
+(
+release_date>=admit_date
+),
+CONSTRAINT wardin CHECK
+(
+ward in ('burn','ICU','emergency medicine','NICU','nephrology',
+     'orthopedics','psychiatry','children','CCU')
+)
+);
+desc Admitted_Patients;
+
+
+--Appointment
+Create table Appointment
+(doctor_id int not null,
+patient_id int not null,
+Appointment_date Date not null,
+Appointment_time varchar(20) not null,
+primary key(doctor_id,patient_id),
+foreign key (doctor_id) references Doctor,
+foreign key (patient_id) references Patient
+);
+desc Appointment;
+
+
+
+
+
+
+
+