In OData, the $select query option is used to specify which properties of an entity or a collection of entities to include in the response.
The basic syntax for using $select is as follows:
bashhttp://serviceRootURL/EntitySet?$select=Property1,Property2,...
where serviceRootURL
is the base URL of the OData service, EntitySet
is the name of the entity set you want to query, and Property1
, Property2
, etc. are the names of the properties you want to include in the response.
For example, let's say you have an OData service that exposes a collection of Customers
, each of which has CustomerId
, FirstName
, LastName
, Email
, and Phone
properties. If you want to retrieve only the CustomerId
and FirstName
properties of all the customers in the collection, you can use the following query:
bashhttp://serviceRootURL/Customers?$select=CustomerId,FirstName
This will return a response that includes only the CustomerId
and FirstName
properties for all the customers in the collection.
Note that you can also use the $select option in combination with other query options, such as $filter, $orderby, and $top, to further refine your query.
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