# Chapter 8. Graph Updates

This chapter describes procedures that can be used to perform graph updates.

The APOC library adds extra functionality for writing to the database.

For more information on how to use these procedures, see:

- Section 8.1, “Creating Data”
- Section 8.2, “UUIDs”
- Section 8.3, “Periodic Execution”
- Section 8.5, “Graph Refactorings”
- Section 8.4, “Atomic Property Updates”
- Section 8.6, “Locking”
- Section 8.7, “Time To Live (TTL) - Expire Nodes”
- Section 8.8, “Generating Graphs”
- Section 8.9, “Deleting Data”