# Operators reference

Discover the available operators to write criterias in CQL.

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Use the summary below to quickly jump to a specific topic:

- [Equal to](/reference/cql/expressions/events/criteria/operators/equal-to): Learn how to check if a property is equal a value.
- [Greater than](/reference/cql/expressions/events/criteria/operators/greater-than): Learn how to check if a property is greater than a value.
- [Greater than or equal to](/reference/cql/expressions/events/criteria/operators/greater-than-or-equal): Learn how to check if a property is greater than or equal to a value.
- [Less than](/reference/cql/expressions/events/criteria/operators/less-than): Learn how to check if a property is less than a value.
- [Less than or equal to](/reference/cql/expressions/events/criteria/operators/less-than-or-equal): Learn how to check if a property is less than or equal to a value.
- [Starting with](/reference/cql/expressions/events/criteria/operators/starting-with): Learn how to check if a string starts with a specific prefix.
- [Ending with](/reference/cql/expressions/events/criteria/operators/ending-with): Learn how to check if a string ends with a specific suffix.
- [Like](/reference/cql/expressions/events/criteria/operators/like): Learn how to check if a string matches another.
- [In](/reference/cql/expressions/events/criteria/operators/in): Learn how to check if an element exists in a collection.
- [Containing](/reference/cql/expressions/events/criteria/operators/containing): Learn how to check if a collection contains a specific element.
- [Containing all](/reference/cql/expressions/events/criteria/operators/containing-all): Learn how to check if a collection contains all elements of another.
- [Containing none](/reference/cql/expressions/events/criteria/operators/containing-none): Learn how to check if a collection does not contain any element of another.
- [Containing either](/reference/cql/expressions/events/criteria/operators/containing-either): Learn how to check if a collection contains one or more elements.
- [Containing neither](/reference/cql/expressions/events/criteria/operators/containing-neither): Learn how to check if a collection has no intersection with another.