Querying Data Using $filter

Operator	Description	Example	Requests...
eq	Equals	http://localhost:5555/odata/ OData.svc/Customers? $filter=Name eq ‘Smith’	All customers whose name is ‘Smith’.
ne	Not equal	http://localhost:5555/odata/ OData.svc/Customers? $filter=Name ne ‘Smith’	All customers whose name is not ‘Smith’.
gt	Greater than	http://localhost:5555/odata/ OData.svc/Products? $filter=Price gt 1000	All products with price greater than 1000.
ge	Greater than or equal	http://localhost:5555/odata/ OData.svc/Products? $filter=Price ge 1000	All products with price greater than or equal to 1000.
lt	Less than	http://localhost:5555/odata/ OData.svc/Products? $filter=Price lt 1000	All products with price less than 1000.
le	Less than or equal	http://localhost:5555/odata/ OData.svc/Products? $filter=Price le 1000	All products with price less than or equal to 1000.
and	Logical and	http://localhost:5555/odata/ OData.svc/Products? $filter=Category eq 'laptop' and Price lt 1000	All products of category laptop and price less than 1000.
or	Logical or	http://localhost:5555/odata/ OData.svc/Customers? $filter=City eq 'Paris' or City eq 'London'	All customers from the city of Paris or London.

Note: You can also use custom filters instead of OData built-in filters while using the $filter system query option. To use your custom filters, set the Use custom filter property of the OData service to True. You can then specify custom filter queries as the value for the $filter parameter of the _retrieve and _update OData service implementations.