Question: Describe control concurrency in a database when you start to buy an item from an online website. Using the following database schema, explain entity

Describe control concurrency in a database when you start to buy an item from an online website. Using the

Describe control concurrency in a database when you start to buy an item from an online website. Using the following database schema, explain entity integrity and referential integrity: PUBLISHER (PublisherId, Name, Address) BOOK (ISBN, Author, Name, PublisherId).

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