Related groups of fields that repeat themselves in variable-length records are called repeated groups.

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This statement is true. Repeated groups are a common feature in variable-length record structures, where certain groups of fields may need to be repeated multiple times within a single record. These repeated groups typically have a fixed format or structure, and represent related sets of data that need to be stored and processed together. Examples of repeated groups might include a list of product features, a set of order line items, or a list of addresses associated with a customer record. Understanding the concept of repeated groups is important when working with database design, as it can impact the way data is stored, accessed, and managed within a given system.

Related Groups of Fields That Repeat Themselves in Variable-Length Records