# TO_UPPER

The TO_UPPER function converts the input string to uppercase.

## Syntax

`TO_UPPER(str)`

### Parameters

#### str

The string expression that you want to convert to uppercase.

## Examples

```esql
ROW message = "Some Text"
| EVAL message_upper = TO_UPPER(message)
```

```esql
FROM employees
| KEEP first_name, last_name
| EVAL first_name_upper = TO_UPPER(first_name)
| EVAL last_name_upper = TO_UPPER(last_name)
```
