RESTful Java Web Services - Third Edition

Querying data

OData supports various kinds of query options as query parameters. For instance, $orderby can be used for sorting the query results. Here is an example:

GET http://localhost:8080/hrapp/odata/Departments?$orderby=    DepartmentName HTTP/1.1

Similarly, you can use the $select option for limiting the attributes on the entity resources returned by a REST API. Here is an example:

GET http://localhost:8080/hrapp/odata/Departments? 
$orderby=DepartmentName&$select=DepartmentName,ManagerId HTTP/1.1 

Some of the frequently used query options are listed in the following table:

Query Option	Description	Example
$filter	This option allows the client to filter a collection of resources.	/Employees? $filter=FirstName eq 'Jobinesh' ...