Query operators can be used to construct query conditions in order to find data. Query operators are typically applied to a property and take a value or a document defining the conditions of the operation.
For example:
{<property>: {<operator>: value}}Or:
{<property>: {<operator>: {<option>: <value>, <option>: value, ...}}}Or, in the case of logical operators (e.g. $and, $or), the operator takes an array of expressions:
{<operator>: [{<expression>}, {<expression>}, ...]}Usage
Query operators can be used in a where query argument or in a $match pipeline stage .
When used in a where query argument, the request looks similar to the following:
GET /<object>?where={<query conditions>}When used in a $match pipeline stage, the request looks similar to the following:
GET /<object>?pipeline=[{"$match":{<query conditions>}}]Query Operator Types
| Type | Description |
|---|---|
| Comparison Operators | For filtering results based on value comparisons. |
| Logical Operators | Join query clauses together or invert the meaning of a query expression |
| Evaluation Operators | Filter results based on the result of a regular expression |
| Geospatial Operators | Find locations within a distance of a central location. |
| Array Operators | Match on arrays, elements in an array, or size of arrays. |