> ## 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: BagToString

> Join all elements of a bag (array) into a single string with an optional delimiter character. Defaults to underscore if delimiter is omitted.

## Description

Concatenates a bag into a string. If the delimiter argument is omitted, the character '\_' is used.

## Syntax

`BagToString(bag_expression[, delimiter_string_expression])`

## Examples

`BagToString(JsonStringToBag('[1,2,3]'),';')` returns 1;2;3

## Return value datatype

String

## Impact of null value

If input is null, returns null.