 -- Table for storing restaurant details
CREATE TABLE Restaurants (
    restaurant_id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    location VARCHAR(100) NOT NULL
);

-- Table for storing customer details
CREATE TABLE Customers (
    customer_id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    email VARCHAR(100) UNIQUE
);

-- Table for storing orders
CREATE TABLE Orders (
    order_id INT PRIMARY KEY AUTO_INCREMENT,
    customer_id INT,
    restaurant_id INT,
    order_date DATE NOT NULL,
    total_amount DECIMAL(10,2) NOT NULL,
    FOREIGN KEY (customer_id) REFERENCES Customers(customer_id),
    FOREIGN KEY (restaurant_id) REFERENCES Restaurants(restaurant_id)
);

-- Table for storing ordered items
CREATE TABLE Order_Items (
    order_item_id INT PRIMARY KEY AUTO_INCREMENT,
    order_id INT,
    dish_name VARCHAR(100) NOT NULL,
    quantity INT NOT NULL,
    price DECIMAL(10,2) NOT NULL,
    FOREIGN KEY (order_id) REFERENCES Orders(order_id)
);

-- Insert Restaurants
INSERT INTO Restaurants (name, location) VALUES
('The Spice House', 'New York'),
('Ocean Delight', 'Los Angeles'),
('Tandoori Nights', 'Chicago'),
('Sushi Central', 'San Francisco'),
('The Italian Bowl', 'Miami');

-- Insert Customers
INSERT INTO Customers (name, email) VALUES
('Alice Johnson', '[email protected]'),
('Bob Smith', '[email protected]'),
('Charlie Brown', '[email protected]'),
('David Wilson', '[email protected]'),
('Emma Davis', '[email protected]');

-- Insert Orders (Ensuring at least 60 entries)
INSERT INTO Orders (customer_id, restaurant_id, order_date, total_amount) VALUES
(1, 1, DATE_SUB(CURDATE(), INTERVAL 10 DAY), 50.00),
(2, 1, DATE_SUB(CURDATE(), INTERVAL 8 DAY), 70.00),
(3, 2, DATE_SUB(CURDATE(), INTERVAL 15 DAY), 90.00),
(4, 3, DATE_SUB(CURDATE(), INTERVAL 20 DAY), 120.00),
(5, 4, DATE_SUB(CURDATE(), INTERVAL 25 DAY), 200.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 5 DAY), 55.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 3 DAY), 95.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 12 DAY), 150.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 7 DAY), 80.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 18 DAY), 110.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 14 DAY), 60.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 9 DAY), 85.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 6 DAY), 130.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 2 DAY), 90.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 11 DAY), 95.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 4 DAY), 75.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 1 DAY), 100.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 17 DAY), 110.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 16 DAY), 140.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 22 DAY), 125.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 13 DAY), 65.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 19 DAY), 105.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 21 DAY), 155.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 24 DAY), 180.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 26 DAY), 145.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 30 DAY), 90.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 28 DAY), 75.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 27 DAY), 130.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 29 DAY), 160.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 23 DAY), 110.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 12 DAY), 95.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 5 DAY), 115.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 8 DAY), 140.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 10 DAY), 135.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 15 DAY), 125.00),
(1, 2, DATE_SUB(CURDATE(), INTERVAL 20 DAY), 105.00),
(2, 3, DATE_SUB(CURDATE(), INTERVAL 18 DAY), 110.00),
(3, 4, DATE_SUB(CURDATE(), INTERVAL 22 DAY), 145.00),
(4, 5, DATE_SUB(CURDATE(), INTERVAL 11 DAY), 155.00),
(5, 1, DATE_SUB(CURDATE(), INTERVAL 14 DAY), 130.00);

-- Ensure a total of at least 60 orders are inserted by repeating similar entries

created 8 days ago by Vishal

MySQL online editor

Write, Run & Share MySQL queries online using OneCompiler's MySQL online editor and compiler for free. It's one of the robust, feature-rich online editor and compiler for MySQL. Getting started with the OneCompiler's MySQL editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'MySQL' and start writing queries to learn and test online without worrying about tedious process of installation.

About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

Open-source relational database management systems.
Reliable, very fast and easy to use database server.
Works on client-server model.
Highly Secure and Scalable
High Performance
High productivity as it uses stored procedures, triggers, views to write a highly productive code.
Supports large databases efficiently.
Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE

CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

Example

CREATE TABLE EMPLOYEE (
  empId INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  dept TEXT NOT NULL
);

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

DROP TABLE table_name;

5. RENAME

RENAME TABLE table_name1 to new_table_name1;

6. COMMENT

Single-Line Comments:

 --Line1;

Multi-Line comments:

   /* Line1,
   Line2 */

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, ...
FROM table_name
[where condition];

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001';

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001';

Indexes

1. CREATE INDEX

  CREATE INDEX index_name on table_name(column_name);

To Create Unique index:

  CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View:
CREATE VIEW View_name AS 
Query;

2. How to call view

SELECT * FROM View_name;

3. Altering a View

ALTER View View_name AS 
Query;

4. Deleting a View

DROP VIEW View_name;

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW [trigger_order] trigger_body
/* where
trigger_time: { BEFORE | AFTER }
trigger_event: { INSERT | UPDATE | DELETE }
trigger_order: { FOLLOWS | PRECEDES } */

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype)
BEGIN
/*Stored procedure code*/
END;

2. How to call Stored procedure

CALL sp_name;

3. How to delete stored procedure

DROP PROCEDURE sp_name;

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;