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SQL DEFAULT Constraint With Alter Table

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SAMER SAEID answered on September 17, 2021 Popularity 9/10 Helpfulness 5/10

answer SQL DEFAULT Constraint With Alter Table

related adding a default constraint to an existing column in sql

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SQL DEFAULT Constraint With Alter Table

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#SQL Server

ALTER TABLE College
ADD CONSTRAINT country_default
DEFAULT 'US' FOR college_country;

#PostgreSQL

ALTER TABLE College
ALTER COLUMN college_code SET DEFAULT 'US';

#MySQL

ALTER TABLE College
ALTER college_country SET DEFAULT 'US';

#Oracle

ALTER TABLE College
MODIFY college_country DEFAULT 'US';

Popularity 9/10 Helpfulness 5/10 Language sql

Source: Grepper

Tags: alter-table default-constraint sql

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Contributed on May 22 2022

SAMER SAEID

0 Answers Avg Quality 2/10

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adding a default constraint to an existing column in sql

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--Altering an existing column to add a default constraint:
ALTER TABLE {TABLE NAME}
ADD CONSTRAINT {CONSTRAINT NAME}
DEFAULT {DEFAULT VALUE} FOR {EXISTING COLUMN NAME}

--Adding a new column, with default value, to an existing table:
ALTER TABLE {TABLE NAME}
ADD {COLUMN NAME} {DATA TYPE} {NULL | NOT NULL}
CONSTRAINT {CONSTRAINT NAME} DEFAULT {DEFAULT VALUE}

--Dropping a contraint:
ALTER TABLE {TABLE NAME}
DROP CONSTRAINT {CONSTRAINT NAME}

Popularity 9/10 Helpfulness 9/10 Language sql

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Tags: default-constraint default-constrain

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Contributed on Sep 17 2021

Fortune Mbulazi

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alter column default in sql

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ALTER TABLE users ALTER COLUMN name SET DEFAULT 'New User';

Popularity 9/10 Helpfulness 8/10 Language sql

Source: Grepper

Tags: alter-column alter-colu

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Contributed on Mar 28 2023

Matt

0 Answers Avg Quality 2/10

SQL DEFAULT Constraint

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CREATE TABLE Persons (
    ID int NOT NULL,
    LastName varchar(255) NOT NULL,
    FirstName varchar(255),
    Age int,
    City varchar(255) DEFAULT 'Sandnes'
);

Popularity 10/10 Helpfulness 4/10 Language sql

Source: Grepper

Tags: default-constraint default-constrain

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Contributed on May 23 2022

naly moslih

0 Answers Avg Quality 2/10

SQL DEFAULT Constraint With Alter Table

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SQL DEFAULT Constraint With Alter Table

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adding a default constraint to an existing column in sql

alter column default in sql

SQL DEFAULT Constraint

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