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What does it mean to say that a database displays referential integrity?Referential integrity refers to the relationship between tables. Because each table in a database must have a primary key, this primary key can appear in other tables because of its relationship to data within those tables. When a primary key from one table appears in another table, it is called a foreign key .
What is the importance of entity integrity and referential integrity in a database?Relational Database Entity Integrity
Entity Integrity ensures that there are no duplicate records within the table and that the field that identifies each record within the table is unique and never null. The existence of the Primary Key is the core of the entity integrity.
What is data integrity and referential integrity?Referential integrity procedures focus specifically on the relationship between tables and making sure data is consistent. Data integrity rules focus on the entry and retrieval of data. Both are necessary for the correct functioning of the database but happen at different times.
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What does it mean to say that a database displays both entity integrity and referential integrity and why entity integrity and referential integrity important in a database?
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