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Gorgeous Gorilla answered on January 27, 2021 Popularity 9/10 Helpfulness 3/10

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ALTER TABLE Evaluation
ADD CONSTRAINT FK_Evaluation_CodeEpreuve
FOREIGN KEY (CodeEpreuve) REFERENCES YourReferencedTable(ReferencedColumn);

Popularity 9/10 Helpfulness 3/10 Language sql

Source: chat.openai.com

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Contributed on Jun 27 2023

Gorgeous Gorilla

0 Answers Avg Quality 2/10

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alter foreign key

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ALTER TABLE Employee
ADD FOREIGN KEY (DeptNo) REFERENCES Department(DeptNo);

Popularity 10/10 Helpfulness 10/10 Language sql

Source: www.computerscienceai.com

Tags: alter alte

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Contributed on Jul 06 2021

sree_007

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add foreign key sql

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ALTER TABLE sounds ADD COLUMN sounds INT NOT NULL,
ADD FOREIGN KEY (sounds) REFERENCES characters(character_id);

Popularity 10/10 Helpfulness 5/10 Language sql

Source: Grepper

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Contributed on Jan 20 2023

Zarden

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foreign key

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CREATE TABLE Employee(
    EmployeeID int NOT NULL,
    LastName varchar(50) NOT NULL,
    FirstName varchar(20) NOT NULL,
    Age int,
    DeptNo int,
    PRIMARY KEY (EmployeeID),
    FOREIGN KEY (DeptNo) REFERENCES Department(DeptNo)
);

Popularity 10/10 Helpfulness 4/10 Language sql

Source: www.computerscienceai.com

Tags: key

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Contributed on Jul 06 2021

sree_007

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Add foreign key to existing table

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ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;

Popularity 10/10 Helpfulness 4/10 Language sql

Source: dba.stackexchange.com

Tags: add

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Contributed on Mar 02 2022

0 Answers Avg Quality 2/10

Add foreign key to existing table

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ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;

Popularity 10/10 Helpfulness 3/10 Language sql

Source: dba.stackexchange.com

Tags: add

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Contributed on Mar 02 2022

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foreign key

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USE Organization
CREATE TABLE Employee
(
Id INT PRIMARY KEY IDENTITY(1,1),
Name VARCHAR (50) NOT NULL,
Age INT,
Gender VARCHAR (50),
Dep_Id int FOREIGN KEY REFERENCES Department(Id),
Insur_Id int FOREIGN KEY REFERENCES Insurance(Id)
)

Popularity 10/10 Helpfulness 3/10 Language sql

Source: codingsight.com

Tags: key

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Contributed on Oct 12 2021

Adorable Armadillo

0 Answers Avg Quality 2/10

foreign key

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Foreign Key: 
It is a column that comes from a different table and
using Foreign key tables are related each other
It is the primary key of another table
It can be duplicate or null for another table


Primary Key :
It is unique column in every table in a database
It can ONLY accept;
    - nonduplicate values
    - cannot be NULL

Unique Key:
Only unique value and also can contain NULL

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Contributed on Jan 27 2021

Obedient Ocelot

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Add foreign key to existing table

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-2

ALTER TABLE message ADD FOREIGN KEY (sender) REFERENCES users;

Popularity 10/10 Helpfulness 2/10 Language sql

Source: dba.stackexchange.com

Tags: add

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Contributed on Mar 02 2022

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foreign key

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ALTER TABLE your_table ADD FOREIGN KEY (your_column) REFERENCES other_table(other_column);

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: stackoverflow.com

Tags: key

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Contributed on Dec 28 2021

Healthy Hare

0 Answers Avg Quality 2/10

Add foreign key

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