Sequelize ORM with NodeJS #17 Lazy Loading vs Eager Loading Sequelize

Publicado el: 10 octubre 2023
en el canal de: Technical Rajni
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Lazy Loading refers to the technique of fetching the associated data only when you really want it; Eager Loading, on the other hand, refers to the technique of fetching everything at once, since the beginning, with a larger query



Lazy loading typically refers to fetching data on-demand, loading related data only when you explicitly request it, while eager loading fetches all necessary data in a single query.

Eager Loading:

Eager loading is the technique of fetching all necessary data upfront, typically using a single query with joins.
It helps reduce the number of database queries and is used when you know you will need the related data.


Lazy Loading:

Lazy loading is the technique of fetching associated data only when you need it.
In Sequelize, lazy loading is the default behavior. When you retrieve a record, related data is not loaded automatically. Instead, it's fetched from the database when you explicitly request it


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