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PostgreSQL constraints

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Programming

Lessons no : 7

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Lessons | 7

PostgreSQL Tutorials | What is Constraint | Types of constraints in PostgreSQL | DBMS Constraints

PostgreSQL Tutorials | What is Constraint | Types of constraints in PostgreSQL | DBMS Constraints

Postgresql Tutorials | Not Null Constraints in Postgresql | postgresql not null example|sql not null

Postgresql Tutorials | Not Null Constraints in Postgresql | postgresql not null example|sql not null

Postgresql Tutorials | Unique Constraints in Postgresql | psql unique constraints

Postgresql Tutorials | Unique Constraints in Postgresql | psql unique constraints

Postgresql Tutorials | Primary Key Constraints in Postgresql | postgresql primary key errors

Postgresql Tutorials | Primary Key Constraints in Postgresql | postgresql primary key errors

PostgreSQL Tutorials | Foreign Key Constraints in Postgresql | primary and foreign key relationship

PostgreSQL Tutorials | Foreign Key Constraints in Postgresql | primary and foreign key relationship

PostgreSQL Tutorials | Check Constraints in Postgresql

PostgreSQL Tutorials | Check Constraints in Postgresql

Postgresql Tutorials | How to drop Constraints | postgresql drop constraints

Postgresql Tutorials | How to drop Constraints | postgresql drop constraints

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There is no ALTER command for constraints in Postgres. The easiest way to accomplish this is to drop the constraint and re-add it with the desired parameters. Of course any change of the constraint will be run against the current table data .