# Collection modifiers

Discover the available modifiers to manipulate collections in CQL.

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

- [Deduplicate modifier](/reference/cql/expressions/modifiers/collection/deduplicate): Learn how to remove duplicate items from a collection.
- [Sort modifier](/reference/cql/expressions/modifiers/collection/sort): Learn how to to sort the items of a collection.