What is include in EF?
The Include method lets you add related entities to the query result. In EF Classic, the Include method no longer returns an IQueryable but instead an IncludeDbQuery that allows you to chain multiple related objects to the query result by using the AlsoInclude and ThenInclude methods.
What is include in EF Core?
The Include method specifies the related objects to include in the query results. It can be used to retrieve some information from the database and also want to include related entities.
What is include () in LINQ?
Introduction to LINQ Include. LINQ include helps out to include the related entities which loaded from the database. It allows retrieving the similar entities to be read from database in a same query. LINQ Include() which point towards similar entities must read from the database to get in a single query.
What is EF query?
EF Core passes a representation of the LINQ query to the database provider. Database providers in turn translate it to database-specific query language (for example, SQL for a relational database). Queries are always executed against the database even if the entities returned in the result already exist in the context.
What is eager loading in EF?
Eager loading is the process whereby a query for one type of entity also loads related entities as part of the query. Eager loading is achieved by use of the Include method. For example, the queries below will load blogs and all the posts related to each blog.
How do I install EF core?
To include both, you need to specify each include path starting at the root. For example, Blog -> Posts -> Author and Blog -> Posts -> Tags . It doesn’t mean you’ll get redundant joins; in most cases, EF will combine the joins when generating SQL. You can also load multiple navigations using a single Include method.
What is include and ThenInclude?
The difference is that Include will reference the table you are originally querying on regardless of where it is placed in the chain, while ThenInclude will reference the last table included. This means that you would not be able to include anything from your second table if you only used Include.
What is include and ThenInclude in LINQ?
You can chain multiple related objects to the query result by using the AlsoInclude and ThenInclude methods. The ThenInclude method moves the chaining level to the property included. It allows us to include related objects from the next level.
What is SQL entity?
Entity – Entity can be real-world object. It is a collection of related attributes or properties. Example: Employee, Department, etc. o Strong Entity –An entity that has a primary key is called as Strong entity. Rectangle represents strong entity.