Schema Design Questions

Enforce data validation rules on a column.

Define a new data type for a column.

Establish a link between two tables based on a common column.

Create a primary key for a related table.

Transitive dependency

Partial dependency

Multi-valued dependency

Join dependency

Increased data redundancy

Reduced query complexity

Increased difficulty in data retrieval and updates

Improved data integrity

A column header describing the data type.

A relationship between two different tables.

A unique record or instance within the table.

A specific attribute or characteristic of an entity.

It increases storage space requirements

All of the above

It can lead to data inconsistencies and anomalies

It complicates data retrieval and manipulation

To prevent unauthorized access to sensitive data

To enforce relationships between tables by ensuring that related data exists

To ensure that all data in a table is unique

To speed up data retrieval queries

The corresponding orders are deleted from the 'Orders' table.

The 'Orders' table is unaffected, and the old customer ID remains.

The corresponding customer IDs in the 'Orders' table are automatically updated.

An error occurs, and the update operation on the 'Customers' table is rolled back.

When query performance is the top priority

When data integrity is critical, and redundancy needs to be minimized

When dealing with small datasets

When storage space is a major concern

Enhanced security

Simplified data manipulation

Improved query performance

Reduced storage space

The table contains a foreign key referencing another table

Each column contains atomic values

There are no repeating groups of columns

A primary key uniquely identifies each row