# Use multiple fields in a calculation

To use values from multiple fields in a mathematic calculation, complete the following steps:

## Filter by fields

Use `filter()` to return only the fields necessary for your calculation. Use the `or` logical operator to filter by multiple fields.

The following example queries two fields, `A` and `B`:

``````from(bucket: "example-bucket")
|> range(start: -1m)
|> filter(fn: (r) => r._field == "A" or r._field == "B")
``````

This query returns one or more tables for each field. For example:

_time_field_value
2021-01-01T00:00:00ZA12.4
2021-01-01T00:00:15ZA12.2
2021-01-01T00:00:30ZA11.6
2021-01-01T00:00:45ZA11.9
_time_field_value
2021-01-01T00:00:00ZB3.1
2021-01-01T00:00:15ZB4.8
2021-01-01T00:00:30ZB2.2
2021-01-01T00:00:45ZB3.3

## Pivot fields into columns

Use `pivot()` to align multiple fields by time.

To correctly pivot on `_time`, points for each field must have identical timestamps. If timestamps are irregular or do not align perfectly, see Normalize irregular timestamps.

``````// ...
|> pivot(rowKey: ["_time"], columnKey: ["_field"], valueColumn: "_value")
``````

Using the queried data above, this `pivot()` function returns:

_timeAB
2021-01-01T00:00:00Z12.43.1
2021-01-01T00:00:15Z12.24.8
2021-01-01T00:00:30Z11.62.2
2021-01-01T00:00:45Z11.93.3

## Perform the calculation

Use `map()` to perform the mathematic operation using column values as operands.

The following example uses values in the `A` and `B` columns to calculate a new `_value` column:

``````// ...
|> map(fn: (r) => ({ r with _value: r.A * r.B }))
``````

Using the pivoted data above, this `map()` function returns:

_timeAB_value
2021-01-01T00:00:00Z12.43.138.44
2021-01-01T00:00:15Z12.24.858.56
2021-01-01T00:00:30Z11.62.225.52
2021-01-01T00:00:45Z11.93.339.27

## Full example query

``````from(bucket: "example-bucket")
|> range(start: -1m)
|> filter(fn: (r) => r._field == "A" or r._field == "B")
|> pivot(rowKey: ["_time"], columnKey: ["_field"], valueColumn: "_value")
|> map(fn: (r) => ({r with _value: r.A * r.B}))
``````

### The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

### InfluxDB v3 enhancements and InfluxDB Clustered is now generally available

New capabilities, including faster query performance and management tooling advance the InfluxDB v3 product line. InfluxDB Clustered is now generally available.

### InfluxDB v3 performance and features

The InfluxDB v3 product line has seen significant enhancements in query performance and has made new management tooling available. These enhancements include an operational dashboard to monitor the health of your InfluxDB cluster, single sign-on (SSO) support in InfluxDB Cloud Dedicated, and new management APIs for tokens and databases.

Learn about the new v3 enhancements

### InfluxDB Clustered general availability

InfluxDB Clustered is now generally available and gives you the power of InfluxDB v3 in your self-managed stack.

Talk to us about InfluxDB Clustered