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create one to many relationship sql

Siméon Nieuwenhuys answered on November 28, 2022 Popularity 10/10 Helpfulness 2/10

answer create one to many relationship sql

related sql many to many relationship

create one to many relationship sql

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CREATE TABLE dbo.city (
  city_id int IDENTITY,
  city varchar(50) NOT NULL,
  country_id int NOT NULL,
  CONSTRAINT PK_city PRIMARY KEY CLUSTERED (city_id)
)
ON [PRIMARY]
GO


CREATE TABLE dbo.country (
  country_id int IDENTITY,
  country varchar(50) NOT NULL,
  CONSTRAINT PK_country PRIMARY KEY CLUSTERED (country_id)
)
ON [PRIMARY]
GO
Step 2

ALTER TABLE dbo.city WITH NOCHECK
  ADD FOREIGN KEY (country_id) REFERENCES dbo.country (country_id)
GO

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Tags: one-to-many relationship sql

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Contributed on Nov 28 2022

Siméon Nieuwenhuys

0 Answers Avg Quality 2/10

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sql many to many relationship

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--example of many to many relationship in sql with junction table. 

CREATE TABLE Students (
    Student_ID INT PRIMARY KEY,
    Student_Name VARCHAR(50)
    -- Other student-related columns
);

CREATE TABLE Courses (
    Course_ID INT PRIMARY KEY,
    Course_Name VARCHAR(50)
    -- Other course-related columns
);

CREATE TABLE Student_Course (
    Student_ID INT,
    Course_ID INT,
    PRIMARY KEY (Student_ID, Course_ID),
    FOREIGN KEY (Student_ID) REFERENCES Students(Student_ID),
    FOREIGN KEY (Course_ID) REFERENCES Courses(Course_ID)
);

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Source: chat.openai.com

Tags: many-to-many many-to-ma

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Contributed on Nov 22 2023

Bhagi Makwana

0 Answers Avg Quality 2/10

create one to many relationship sql

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