http://drupal.stackexchange.com/questions/30678/advantages-of-utilizing-entity-field-query-over-views
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Views cannot perform queries on databases other than relational db (eg Mongodb | NO-SQL). However with EFQ, you can now perform complex queries against No-SQL databases including joins. Hence greater scalability and relatively good performace as well. However as of now you can also combine Views UI with EFQ with an updated module calledefq_views. This way you get a UI and backend power of EFQ. |