> ## Documentation Index
> Fetch the complete documentation index at: https://www.integrate.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ETL: UPPER

> Convert all characters in a string expression to uppercase. Use UPPER for case normalization and standardization in Integrate.io ETL data pipelines.

## Description

Converts the characters in a string field to upper case.

## Syntax

`UPPER(string_expression)`

## Examples

`UPPER('u.s.a.')` returns 'U.S.A.'

## Return value datatype

String

## Impact of null value

If input is null, returns null.