appwrite/docs/examples/1.6.x/server-graphql/examples/databases/update-string-attribute.md

mutation { databasesUpdateStringAttribute( databaseId: "<DATABASE_ID>", collectionId: "<COLLECTION_ID>", key: "", required: false, default: "", size: 1, newKey: "" ) { key type status error required array _createdAt _updatedAt size default } }