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DDL.sql

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+--DROP TABLE Payment ;
+--DROP TABLE delivary ;
+--DROP TABLE transaction ;
+--DROP TABLE order_detail ;
+--DROP TABLE food_info ;
+--DROP TABLE Customer ;
+--DROP TABLE Employee;
+
+
+----< Create tables >----
+Create table Employee(
+ 	Emp_ID number(20) NOT NULL,
+ 	Name varchar(15),
+ 	Contact varchar(20),
+    User_Name varchar(20),
+    Pass varchar(20),
+    Address varchar(20),
+ 	PRIMARY KEY (Emp_ID)
+ );
+
+Create table Customer(
+     Cust_ID Number (20) Not Null,
+	cust_name varchar(22),
+	Phone varchar(14),
+
+    USER_NAME varchar(20),
+    PASS varchar(20),
+    CUST_ADDRESS varchar(20),
+	PRIMARY KEY(Cust_id)
+    );
+
+
+Create table food_info(
+   FOODID number(5) NOT NULL,
+      FOOD_NAME varchar(12),
+    Price number check(price>0) not null,
+	DETAILS varchar(20),
+	STATUS varchar(20),
+	PRIMARY KEY (FOODID)
+   );
+Create table order_detail(
+    ORDER_ID number(20) NOT NULL,
+    EMP_ID number(20),
+    CUST_ID number(20),
+    FOODID number(5),
+    Amount number check(amount>0),
+    ORDER_DATE varchar(10),
+PRIMARY KEY(ORDER_ID),
+FOREIGN KEY (Cust_id) References Customer(Cust_id) ON DELETE CASCADE,
+FOREIGN KEY (EMP_ID) References Employee(EMP_ID) ON DELETE CASCADE,
+FOREIGN KEY (FOODID) References food_info(FOODID) ON DELETE CASCADE
+
+);
+
+
+Create table transaction(
+    TRANS_ID Number (20) Not Null,
+    TRANS_DATE varchar(10),
+    ORDER_ID number(20),
+    EMP_ID number(20),
+    CUST_ID number(20),
+    PRIMARY KEY(TRANS_ID),
+FOREIGN KEY (Cust_id) References Customer(Cust_id) ON DELETE CASCADE,
+FOREIGN KEY (EMP_ID) References Employee(EMP_ID) ON DELETE CASCADE,
+FOREIGN KEY (ORDER_ID) References order_detail(ORDER_ID) ON DELETE CASCADE
+
+);
+
+
+Create table delivary(
+   DELIVARY_ID Number (20) Not Null, 
+   ORDER_ID number(20),
+   DELIVARY_DATE varchar(10),
+   PRIMARY KEY(DELIVARY_ID),
+   FOREIGN KEY (ORDER_ID) References order_detail(ORDER_ID) ON DELETE CASCADE
+   );
+
+
+Create table Payment(
+    Pay_ID Number (20) Not Null,
+    DELIVARY_ID Number (20),
+    ORDER_ID number(20),
+    CUST_ID number(20),
+    Amount number check(amount>0),
+    Pay_DATE varchar(10),
+    FOREIGN KEY (ORDER_ID) References order_detail(ORDER_ID) ON DELETE CASCADE,
+    FOREIGN KEY (Cust_id) References Customer(Cust_id) ON DELETE CASCADE,
+    FOREIGN KEY (DELIVARY_ID) References delivary(DELIVARY_ID) ON DELETE CASCADE,
+PRIMARY KEY(Pay_ID)
+    );
+
+   ----< Describe Table >----
+DESCRIBE CUSTOMER ;
+DESCRIBE DELIVARY ;
+DESCRIBE EMPLOYEE ;
+DESCRIBE FOOD_INFO ;
+DESCRIBE ORDER_DETAIL ;
+DESCRIBE PAYMENT ;
+DESCRIBE TRANSACTION ;
+
+ALTER TABLE CUSTOMER
+ADD (LOCATION VARCHAR(25),
+REVIEW VARCHAR(3));
+
+ALTER TABLE CUSTOMER
+DROP COLUMN LOCATION;
+ALTER TABLE CUSTOMER
+DROP COLUMN REVIEW;
+
+ALTER TABLE CUSTOMER 
+RENAME COLUMN CUST_ADDRESS TO Customer_add;
+
+ALTER TABLE customer 
+RENAME COLUMN Customer_add TO CUST_ADDRESS;

DML.sql

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+----< Data Insertion >----
+
+-- INSERT INTO EMPLOYEE VALUES (Emp_ID, Name,Contact, username,password,address);
+INSERT INTO Employee VALUES (0, 'Smith', '01715043801','sm00','101','80-Dhaka');
+INSERT INTO Employee VALUES (1, 'Jerry', '01715043802','je01','102','81-Dhaka');
+INSERT INTO Employee VALUES (2, 'Geore', '01715043803','ge02','103','82-Dhaka');
+INSERT INTO Employee VALUES (3, 'Elaine', '01715043804','el03','104','83-Dhaka');
+INSERT INTO Employee VALUES (4, 'Jim', '01715043805','ji04','105','84-Dhaka');
+INSERT INTO Employee VALUES (5, 'kim', '01715043806','ki05','106','85-Dhaka');
+INSERT INTO Employee VALUES (6, 'Arnold', '01715043807','ar06','107','86-Dhaka');
+INSERT INTO Employee VALUES (7, 'Michellet', '01715043808','mi07','108','87-Dhaka');
+INSERT INTO Employee VALUES (8, 'Amer', '01715043809','am08','109','88-Dhaka');
+INSERT INTO Employee VALUES (9, 'Ron', '01715043800','ro09','110','89-Dhaka');
+INSERT INTO Employee VALUES (10, 'Rocky', '01715043810','ro10','100','90-Dhaka');
+
+
+-- INSERT INTO Customer VALUES (Cust_ID,Cust_Name,phone, username,password,CUST_ADDRESS);
+INSERT INTO Customer VALUES (11, 'Mith', '01715043301','mi00','201','80-khulna');
+INSERT INTO Customer VALUES (12, 'Jero', '01715043302','je01','202','81-khulna');
+INSERT INTO Customer VALUES (13, 'Geow', '01715043303','ge02','203','82-khulna');
+INSERT INTO Customer VALUES (14, 'Eline', '01715043304','el03','204','83-khulna');
+INSERT INTO Customer VALUES (15, 'Jamo', '01715043305','ja04','205','84-khulna');
+INSERT INTO Customer VALUES (16, 'kumo', '01715043306','ku05','206','85-khulna');
+INSERT INTO Customer VALUES (17, 'Arno', '01715043307','ar06','207','86-khulna');
+INSERT INTO Customer VALUES (18, 'Millet', '01715043308','mi07','208','87-sylhet');
+INSERT INTO Customer VALUES (19, 'Amos', '01715043309','am08','209','88-sylhet');
+INSERT INTO Customer VALUES (20, 'Ronny', '01715043300','ro09','210','89-sylhet');
+INSERT INTO Customer VALUES (21, 'Rock', '01715043310','ro10','200','90-sylhet');
+
+--INSERT INTO Food_info VALUES (FoodID,food_name ,Price, details,status)
+INSERT INTO Food_info VALUES (101,'pasta',302,'spicy ','available');
+INSERT INTO Food_info VALUES (102,'burger',129,'yummy','available');
+INSERT INTO Food_info VALUES (103,'Donuts',302,'flavorful ','available');
+INSERT INTO Food_info VALUES (104,'Pizza',129,'yummy','available');
+INSERT INTO Food_info VALUES (105,'Oreo Cookies',700,'savory','not available');
+INSERT INTO Food_info VALUES (106,'Ice Cream',250,'spicy ','available');
+INSERT INTO Food_info VALUES (107,'Potato Chips',50,'yummy','not available');
+INSERT INTO Food_info VALUES (108,'French Fries',180,'flavorful','available');
+INSERT INTO Food_info VALUES (109,'Soft Drinks',40,'cold','available');
+INSERT INTO Food_info VALUES (110,'Ramen',700,'spicy','available');
+
+--INSERT INTO order_detail VALUES (order_id,emp_id,cust_id,FOODID,Amount,ORDER_DATE);
+
+INSERT INTO order_detail VALUES (51,2,15,105,5,'15-5-2023');
+INSERT INTO order_detail VALUES (52,3,16,106,6,'14-5-2023');
+INSERT INTO order_detail VALUES (53,2,17,104,4,'13-5-2023');
+INSERT INTO order_detail VALUES (54,1,18,105,2,'18-5-2023');
+INSERT INTO order_detail VALUES (55,5,19,109,8,'15-5-2023');
+INSERT INTO order_detail VALUES (56,1,18,108,4,'11-5-2023');
+INSERT INTO order_detail VALUES (57,6,14,105,8,'12-5-2023');
+INSERT INTO order_detail VALUES (58,8,14,107,4,'19-5-2023');
+INSERT INTO order_detail VALUES (59,9,18,104,2,'20-5-2023');
+INSERT INTO order_detail VALUES (60,5,12,106,9,'02-5-2023');
+
+
+--INSERT INTO transaction VALUES (TRANS_ID,TRANS_DATE,order_id,emp_id,cust_id);
+INSERT INTO transaction VALUES (61,'15-5-2023',51,2,15);
+INSERT INTO transaction VALUES (62,'14-5-2023',52,3,16);
+INSERT INTO transaction VALUES (63,'13-5-2023',53,2,17);
+INSERT INTO transaction VALUES (64,'18-5-2023',54,1,18);
+INSERT INTO transaction VALUES (65,'15-5-2023',55,5,19);
+INSERT INTO transaction VALUES (66,'11-5-2023',56,1,18);
+INSERT INTO transaction VALUES (67,'12-5-2023',57,6,14);
+INSERT INTO transaction VALUES (68,'19-5-2023',58,8,14);
+INSERT INTO transaction VALUES (69,'20-5-2023',59,9,18);
+INSERT INTO transaction VALUES (70,'02-5-2023',60,5,12);
+
+--INSERT INTO delivary VALUES (DELIVARY_ID,ORDER_ID,DELIVARY_DATE);
+INSERT INTO delivary VALUES (71,60,'30-5-2023');
+INSERT INTO delivary VALUES (72,59,'29-5-2023');
+INSERT INTO delivary VALUES (73,58,'28-5-2023');
+INSERT INTO delivary VALUES (74,57,'27-5-2023');
+INSERT INTO delivary VALUES (75,56,'26-5-2023');
+INSERT INTO delivary VALUES (76,55,'25-5-2023');
+INSERT INTO delivary VALUES (77,54,'24-5-2023');
+INSERT INTO delivary VALUES (78,53,'23-5-2023');
+INSERT INTO delivary VALUES (79,52,'22-5-2023');
+INSERT INTO delivary VALUES (80,51,'21-5-2023');
+
+
+--INSERT INTO Payment VALUES (Pay_ID,DELIVARY_ID,ORDER_ID,CUST_ID,Amount,Pay_DATE);
+INSERT INTO Payment VALUES (81,71,60,12,9,'30-5-2023');
+INSERT INTO payment VALUES (82,72,59,18,2,'29-5-2023');
+INSERT INTO payment VALUES (83,73,58,14,4,'28-5-2023');
+INSERT INTO payment VALUES (84,74,57,14,8,'27-5-2023');
+INSERT INTO payment VALUES (85,75,56,18,4,'26-5-2023');
+INSERT INTO payment VALUES (86,76,55,19,8,'25-5-2023');
+INSERT INTO payment VALUES (87,77,54,18,2,'24-5-2023');
+INSERT INTO payment VALUES (88,78,53,17,4,'23-5-2023');
+INSERT INTO payment VALUES (89,79,52,16,6,'22-5-2023');
+INSERT INTO payment VALUES (90,80,51,15,5,'21-5-2023');
+
+
+
+----< Data Update >----
+-- changing employee address
+
+update employee
+set address='80-bashab'
+where employee.Emp_ID=0;
+
+select * from employee;
+
+----< Data Delete >----
+-- if we want to sack any employee
+--DELETE FROM employee 
+--WHERE Emp_ID = 3;
+
+
+select price from food_info;
+select distinct(cust_id) from order_detail;
+
+
+--divide Price by 2 where price>=300;
+SELECT (price/2) FROM food_info
+WHERE price>=300;
+
+--USING 'AS'
+SELECT (price/2) AS REDUCED_price FROM food_info
+WHERE price>=300;
+
+--USING BETWEEN ,AND
+SELECT price FROM food_info
+WHERE price BETWEEN 100 AND 400;
+
+
+--DIFF OF 'IN'  AND 'BETWEEN'
+SELECT Food_name,price FROM food_info
+WHERE price IN (302,129);
+--order by
+SELECT price
+FROM food_info
+ORDER BY price;
+
+
+SELECT cust_name,Cust_ID
+FROM CUSTOMER
+ORDER BY Cust_ID DESC;
+
+
+
+--like %---%
+SELECT cust_name, Cust_ID
+FROM CUSTOMER
+where cust_name LIKE '%nn%';
+
+--FIND ACC WHICH HAS NAME STARTED WITH M
+SELECT cust_name, Cust_ID
+FROM CUSTOMER
+where cust_name LIKE 'M%';
+
+--FIND ACC WHICH HAS NAME ENDS WITH ne
+SELECT cust_name, Cust_ID
+FROM CUSTOMER
+where cust_name LIKE '%ne';
+
+--FIND ACC WHICH HAS NAME WITH 'A' IN MIDDLE
+SELECT cust_name, Cust_ID
+FROM CUSTOMER
+where cust_name LIKE '%_a_%';
+
+---<Aggregate function>---
+select * from customer;
+
+SELECT COUNT(*) FROM CUSTOMER;
+
+SELECT SUM(price) FROM food_info;
+
+SELECT SUM(DISTINCT price) FROM food_info;
+
+--one Customer has multiple order in order table
+SELECT COUNT(foodID) as Numbers ,cust_id
+FROM Order_detail
+GROUP BY cust_id;
+
+---NUMBER OF SAME AMOUNT OF price IN food_info TABLE
+SELECT price, COUNT(*)
+FROM food_info
+GROUP BY price
+HAVING price<400;
+
+
+
+
+--STatus of food_name which are available nested query
+SELECT food_name,price
+FROM  food_info
+WHERE foodid IN (
+    SELECT foodid
+    FROM food_info
+    WHERE status='available'
+);
+-- CUSTOMERS WHO HAS paid 0R DIDNT paid
+SELECT Cust_ID 
+FROM PAYMENT
+UNION ALL
+SELECT Cust_ID  
+FROM order_detail;
+
+--INTERSECT (CUSTOMER NAME WHO HAS ordered AND  amount>2)
+
+SELECT CUST_Name
+FROM CUSTOMER NATURAL JOIN PAYMENT
+INTERSECT 
+SELECT CUST_Name
+FROM CUSTOMER 
+WHERE Cust_ID IN (
+    SELECT Cust_id
+    FROM order_detail
+    WHERE amount>2
+);
+------minus
+-- Customers with order less than 100taka
+select cust_name from customer
+natural join order_detail
+minus
+select cust_name from customer
+where cust_id IN(select cust_id from order_detail 
+where foodid In(select foodid from food_info where price>=100));
+
+
+
+
+--name who order maximum type
+select cust_name from customer where cust_id=(select cust_id from order_detail group by cust_id having count(*)=
+(select max(cnt)  from(
+SELECT count(*) as cnt ,cust_id
+FROM order_detail
+group by cust_id)));
+
+
+
+
+
+
+-- Inner Join
+select d.cust_id, d.cust_name, p.pay_id,p.amount from customer d inner join
+payment p on d.cust_id = p.cust_id;
+
+-- food price less than some price
+
+select price ,food_name from food_info
+where price < some(select price from food_info);
+
+-- food price less than avg price
+
+select price,food_name from food_info
+where price< (select avg(price) from food_info );
+
+--customer paid at 24-5-2023
+
+
+select cust_name from customer 
+where cust_id=(select cust_id from payment where Pay_DATE = '24-5-2023');
+
+