The semijoin approach saves network traffic.

Solution (By Examveda Team)

The statement is true. The semijoin approach can indeed save network traffic by reducing the amount of data transferred between distributed database nodes.

Option A: True
This option correctly affirms the statement provided in the question. The semijoin operation involves sending only the attributes needed for join conditions from one site to another, resulting in reduced data transmission over the network. Instead of transferring entire relations, the semijoin operation sends only the necessary attributes, allowing the receiving site to perform join operations locally and retrieve only the relevant rows. By minimizing the amount of data transmitted between nodes, the semijoin approach helps to conserve network bandwidth and improve overall query performance in distributed database systems.

Option B: False
This option contradicts the statement provided in the question. The semijoin approach is specifically designed to reduce network traffic by sending only the required attributes for join conditions between distributed database nodes. By minimizing the amount of data transferred over the network, the semijoin operation can help improve query performance and scalability in distributed database environments.

Therefore, in response to the question, the correct option is True (Option A).