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ddl.sql

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+DROP TABLE orders;
+DROP TABLE customer;
+DROP TABLE product;
+DROP TABLE employee;
+DROP TABLE branch;
+
+
+create table branch(
+branch_id int not null,
+street varchar(40),
+city varchar(40),
+contact_no varchar(20),
+primary key (branch_id)
+);
+
+create table employee(
+employee_id int not null,
+branch_id int not null,
+name varchar(40),
+employee_type varchar(40),
+salary int,
+address varchar(40),
+phone varchar(20),
+primary key (employee_id),
+foreign key (branch_id) references branch
+);
+
+create table customer(
+customer_id int not null,
+name varchar(40),
+address varchar(40),
+phone varchar(20),
+primary key (customer_id)
+);
+
+create table product(
+product_id int not null,
+branch_id int not null,
+product_type varchar(40),
+product_size varchar(20),
+price decimal(10,2),
+primary key (product_id),
+foreign key (branch_id) references branch
+);
+
+create table orders(
+order_id int not null,
+customer_id int not null,
+product_id int not null,
+order_date varchar(40),
+delivary_location varchar(40),
+primary key(order_id),
+foreign key(customer_id) references customer,
+foreign key(product_id) references product
+);
+
+set pagesize 100
+set linesize 200
+
+--show all created table
+select table_name from user_tables;
+
+--delete a column from table
+alter table orders drop column order_date;
+
+--add a column in the table
+alter table orders add order_date varchar(40);
+
+--rename column
+alter table product rename column price to product_price;
+alter table product rename column product_price to price;
+
+--change column data type
+alter table product modify product_size varchar(40);
+
+alter table employee modify employee_type varchar(20);
+alter table employee modify name varchar(20);
+alter table employee modify address varchar(20);

dml.sql

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+insert into branch values(1,'shib bari','khulna','01*********');
+insert into branch values(2,'shonadanga','khulna','01*********');
+insert into branch values(3,'new market','dhaka','01*********');
+insert into branch values(4,'new market','khulna','01*********');
+insert into branch values(5,'daulotpur','khulna','01*********');
+insert into branch values(6,'bhanga','faridpur','01*********');
+insert into branch values(7,'mirpur-10','dhaka','01*********');
+insert into branch values(8,'gulshan-12','dhaka','01*********');
+insert into branch values(9,'shahabag','dhaka','01*********');
+insert into branch values(10,'fulbariget','khulna','01*********');
+
+
+insert into employee values(1,1,'sadi','manager',30000,'khulna','01*********');
+insert into employee values(2,1,'asif','salesman',10000,'khulna','01*********');
+insert into employee values(3,2,'atik','salesman',10000,'khulna','01*********');
+insert into employee values(4,3,'salman','cashier',20000,'dhaka','01*********');
+insert into employee values(5,2,'rahim','manager',30000,'khulna','01*********');
+insert into employee values(6,3,'sabbir','salesman',10000,'dhaka','01*********');
+insert into employee values(7,4,'abrar','manager',30000,'khulna','01*********');
+insert into employee values(8,10,'safwan','cashier',20000,'khulna','01*********');
+insert into employee values(9,4,'shuvro','salesman',10000,'khulna','01*********');
+insert into employee values(10,4,'naieem','salesman',10000,'khulna','01*********');
+
+
+insert into customer values(1,'sadi','daulotpur,khulna','01*********');
+insert into customer values(2,'asif','fulbariget,khulna','01*********');
+insert into customer values(3,'atik','banani,dhaka','01*********');
+insert into customer values(4,'shafiqul','boyra,khulna','01*********');
+insert into customer values(5,'hadi','bhanga,faridpur','01*********');
+insert into customer values(6,'zunnun','fultala,khulna','01*********');
+insert into customer values(7,'shonjoy','shibbari,khulna','01*********');
+insert into customer values(8,'ashfaq','cumilla','01*********');
+insert into customer values(9,'hasib','varamara,kushtia','01*********');
+insert into customer values(10,'naieem','daulotpur,khulna','01*********');
+
+
+insert into product values(1,1,'shirt','L',1299.99);
+insert into product values(2,1,'pant','34',1099.99);
+insert into product values(3,1,'shirt','xL',1599.99);
+insert into product values(4,1,'t-shirt','M',699.99);
+insert into product values(5,4,'shirt','L',1299.99);
+insert into product values(6,4,'t-shirt','S',599.99);
+insert into product values(7,4,'jacket','xL',2299.99);
+insert into product values(8,4,'shirt','xxL',1899.99);
+insert into product values(9,3,'shirt','L',1299.99);
+insert into product values(10,3,'pant','32',1599.99);
+
+
+insert into orders values(1,1,1,'01-01-2023','daulotpur,khulna');
+insert into orders values(2,1,2,'01-01-2023','daulotpur,khulna');
+insert into orders values(3,2,1,'01-01-2023','daulotpur,khulna');
+insert into orders values(4,2,4,'01-01-2023','daulotpur,khulna');
+insert into orders values(5,2,3,'01-01-2023','daulotpur,khulna');
+insert into orders values(6,3,9,'01-01-2023','daulotpur,khulna');
+insert into orders values(7,3,10,'01-01-2023','daulotpur,khulna');
+insert into orders values(8,3,1,'01-01-2023','daulotpur,khulna');
+insert into orders values(9,4,7,'01-01-2023','daulotpur,khulna');
+insert into orders values(10,4,6,'01-01-2023','daulotpur,khulna');
+
+
+select * from branch;
+select * from employee;
+select * from customer;
+select * from product;
+select * from orders;
+
+--all order made by sadi
+select * from orders where customer_id=(select customer_id from customer where name='sadi');
+
+--all order placed in shib bari branch
+select * from orders where product_id IN(select product_id from product where branch_id=(select branch_id from branch where street='shib bari'));
+
+--update salary of salesman
+update employee set salary=15000 where employee_type='salesman';
+select * from employee;
+
+--all shirt and tshirt
+select product_type,product_size,price from product where product_type like 's%' or product_type like 't%';
+
+--all shirt 
+select product_type,product_size,price from product where product_type like 's%' and product_type like 't%';
+
+
+--avarage price of shirt,t-shirt,pant,jacket
+select product_type,avg(price) from product group by product_type;
+
+--avarage price greater than 1000;
+select product_type,avg(price) from product group by product_type having avg(price)>1000;
+
+--product with maximum price
+with max_price(price) as (select max(price) from product)
+select * from product,max_price where product.price=max_price.price;
+
+--product with second maximum price
+with max_price(price) as (select max(price) from product where price<(select max(price) from product))
+select * from product,max_price where product.price=max_price.price;
+
+--number of ordered product
+select count(distinct product_id) as no_of_product_ordered from orders;
+
+--number of shirt ordered
+select count(product_id) from orders where product_id IN(select product_id from product where product_type='shirt');
+
+--join product and order table
+select order_id,product_id,product_type from orders join product using (product_id)
+order by order_id;
+
+--total price of all product ordered
+select sum(price) from orders join product using (product_id);
+
+

pl-sql.sql

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+set serveroutput on
+declare 
+product_id2 product.product_id%type;
+product_type product.product_type%type;
+price product.price%type;
+begin
+select product_id,product_type,price into product_id2,product_type,price from product where product_id=1;
+dbms_output.put_line('product_id: '||product_id2|| ' product_type: '||product_type || ' price: '||price);
+end;
+/
+
+--insert and set default value
+set serveroutput on
+declare 
+product_id product.product_id%type:=11;
+branch_id product.branch_id%type:=8;
+product_type product.product_type%type:='pant';
+product_size product.product_size%type:='33';
+price product.price%type:=1599.99;
+begin
+insert into product values(product_id,branch_id,product_type,product_size,price);
+end;
+/
+
+
+--row type
+set serveroutput on
+declare 
+product_row product%rowtype;
+begin
+select product_id,product_type,price into product_row.product_id,product_row.product_type,product_row.price from product where product_id=1;
+dbms_output.put_line('product_id: '||product_row.product_id|| ' product_type: '||product_row.product_type || ' price: '||product_row.price);
+end;
+/
+
+
+--cursor and row count
+set serveroutput on
+declare 
+cursor product_cursor is select * from product;
+product_row product%rowtype;
+begin
+open product_cursor;
+fetch product_cursor into product_row.product_id,product_row.branch_id,product_row.product_type,product_row.product_size,product_row.price;
+while product_cursor%found loop
+dbms_output.put_line('product_id: '||product_row.product_id|| ' product_type: '||product_row.product_type || ' price: '||product_row.price);
+dbms_output.put_line('Row count: '|| product_cursor%rowcount);
+fetch product_cursor into product_row.product_id,product_row.branch_id,product_row.product_type,product_row.product_size,product_row.price;
+end loop;
+close product_cursor;
+end;
+/
+
+
+--for while loop ,array
+set serveroutput on
+declare 
+  counter number;
+  name customer.name%type;
+  TYPE NAMEARRAY IS VARRAY(8) OF customer.name%type; 
+  A_NAME NAMEARRAY:=NAMEARRAY();
+begin
+  counter:=2;
+  A_NAME.EXTEND();
+  for x in 2..8  
+  loop
+    select name into name from customer where customer_id=x;
+    A_NAME.EXTEND();
+    A_NAME(counter):=name;
+    counter:=counter+1;
+  end loop;
+  counter:=2;
+  while counter<=A_NAME.COUNT 
+    loop 
+    dbms_output.put_line(A_NAME(counter)); 
+    counter:=counter+1;
+  end loop;
+end;
+/
+
+
+--for while loop ,array without extend
+set serveroutput on
+declare 
+  counter number;
+  name customer.name%type;
+  TYPE NAMEARRAY IS VARRAY(8) OF customer.name%type; 
+  A_NAME NAMEARRAY:=NAMEARRAY('name1','name1','name1','name1','name1','name1','name1','name1');
+begin
+  counter:=1;
+  for x in 2..8  
+  loop
+    select name into name from customer where customer_id=x;
+    A_NAME(counter):=name;
+    counter:=counter+1;
+  end loop;
+  counter:=1;
+  while counter<=7 
+    loop 
+    dbms_output.put_line(A_NAME(counter)); 
+    counter:=counter+1;
+  end loop;
+end;
+/
+
+
+
+--if else
+set serveroutput on
+declare 
+  counter number;
+  name employee.name%type;
+  salary employee.salary%type;
+begin
+  for x in 2..8  
+  loop
+    select name,salary into name,salary from employee where employee_id=x;
+    if salary>=30000
+	then
+	dbms_output.put_line(name||' is a manager');
+    elsif salary>=20000
+	then
+	dbms_output.put_line(name||' is a cashier');
+    else
+	dbms_output.put_line(name||' is a salesman');
+	end if;
+  end loop;
+end;
+/
+
+
+
+create or replace procedure proc2(
+  var1 in number,
+  var2 out VARCHAR2
+)
+AS
+  t_show CHAR(30);
+begin
+  t_show := 'From procedure: ';
+  select name into var2 from customer where customer_id IN (select customer_id from orders where product_id = var1);
+  dbms_output.put_line(t_show || var2 || ' ordered product with id: ' || var1);
+end;
+/
+
+set serveroutput on
+declare 
+product_id product.product_id%type:=9;
+name customer.name%type;
+begin
+proc2(product_id,name);
+end;
+/
+
+drop procedure proc2;
+
+
+
+set serveroutput on
+create or replace function fun(var1 in varchar) return varchar AS
+value customer.name%type;
+begin
+  select name into value from customer where customer_id=var1; 
+   return value;
+end;
+/
+
+set serveroutput on
+declare 
+value varchar(40);
+begin
+value:=fun(2);
+dbms_output.put_line(value);
+end;
+/
+
+drop function fun;
+
+SET SERVEROUTPUT ON
+CREATE OR REPLACE TRIGGER try
+BEFORE delete ON product 
+REFERENCING OLD AS o NEW AS n
+FOR EACH ROW
+BEGIN
+delete from orders where product_id=:o.product_id;
+END;
+/
+
+
+SET SERVEROUTPUT ON
+CREATE OR REPLACE TRIGGER try2
+BEFORE delete ON branch 
+REFERENCING OLD AS o NEW AS n
+FOR EACH ROW
+BEGIN
+delete from employee where branch_id=:o.branch_id;
+END;
+/
+