In a one-to-many or many-to-many relationship, the table on the "many" side must have a single attribute key. This key is often referred to as the foreign key, and it is used to establish and enforce a link between the data in two tables.

The table does not necessarily need to be in Third Normal Form (3NF) or Second Normal Form (2NF), although these are best practices for database normalization to prevent data anomalies.

A composite key, which is a key that consists of two or more attributes, is not a requirement for the "many" side of a relationship. However, it can be used if the combination of multiple fields is required to ensure uniqueness or if the fields are collectively used in a foreign key relationship.

So, to summarize, the table on the many side of a one-to-many or many-to-many relationship must have a single attribute key, but it does not necessarily need to be in 2NF or 3NF or have a composite key.

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In a one-to-many or many-to-many relationship, the table on the "many" side must have a single attribute key. This key is often referred to as the foreign key, and it is used to establish and enforce a link between the data in two tables.

The table does not necessarily need to be in Third Normal Form (3NF) or Second Normal Form (2NF), although these are best practices for database normalization to prevent data anomalies.

A composite key, which is a key that consists of two or more attributes, is not a requirement for the "many" side of a relationship. However, it can be used if the combination of multiple fields is required to ensure uniqueness or if the fields are collectively used in a foreign key relationship.

So, to summarize, the table on the many side of a one-to-many or many-to-many relationship must have a single attribute key, but it does not necessarily need to be in 2NF or 3NF or have a composite key.

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In a one-to-many or many-to-many relationship, the table on the "many" side must have a single attribute key. This key is often referred to as the foreign key, and it is used to establish and enforce a link between the data in two tables.

The table does not necessarily need to be in Third Normal Form (3NF) or Second Normal Form (2NF), although these are best practices for database normalization to prevent data anomalies.

A composite key, which is a key that consists of two or more attributes, is not a requirement for the "many" side of a relationship. However, it can be used if the combination of multiple fields is required to ensure uniqueness or if the fields are collectively used in a foreign key relationship.

So, to summarize, the table on the many side of a one-to-many or many-to-many relationship must have a single attribute key, but it does not necessarily need to be in 2NF or 3NF or have a composite key.

A table on the many side of a one to many or many to many relationship must: Be in Third Normal Form (3NF) Be in Second Normal Form (2NF) Have a composite key Have a single attribute key

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