---
title: Operate on columns
description: >
  Find and count unique values, recalculate the `_value` column, and use values to calculate a new column.
influxdb/cloud/tags: [queries]
aliases: 
  - /influxdb/cloud/query-data/common-queries/count_unique_values_for_column/
  - /influxdb/cloud/query-data/common-queries/recalculate_value_column/
  - /influxdb/cloud/query-data/common-queries/calculate_new_column/
menu:
  influxdb_cloud:
    name: Operate on columns
    parent: Common queries
weight: 100  
source: /shared/influxdb-v2/query-data/common-queries/operate-on-columns.md
---

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