CustomerListQuery

CustomerListQuery is a data retrieval construct used in software systems to request a list of customer records that meet specified criteria. It encapsulates the filtering, sorting, and pagination logic needed to produce a manageable subset of customers, helping separate query concerns from business rules and presentation.

In practice, a CustomerListQuery is used in customer relationship management (CRM) and marketing platforms to support tasks such as segmenting audiences, generating dashboards, or exporting contact data. A query may specify filters such as customer status, lifecycle stage, country, or signup date range; it may also request a particular set of fields (projection), and define how results should be ordered and paginated.

Implementation often follows the query object or builder pattern. The query is passed to a data access layer or ORM, which returns a list of customer records or data transfer objects that match the criteria. Queries can be server-side, executed against relational or NoSQL stores, and can be used to drive user interfaces or automated workflows. Example scenarios include retrieving all active customers created in the last 90 days in the United States, sorted by lastPurchaseDate descending, with a page size of 100.

Performance and security considerations include indexing common filter fields, caching results, and enforcing access controls to limit which records can be retrieved. The exact capabilities of a CustomerListQuery vary by system, but the pattern is widely used to promote reusable, testable data access logic. Related concepts include the Customer entity, query object pattern, and data access layer design.