# InputOutput and Database

### In this section

* [ReadMapInput](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/readmapinput-function)
* [ReadURL](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/readurl-function)
* [ReadNested](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/readnested-function)
* [ReadMessage](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/readmessage-function)
* [ReadMessageProperties](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/readmessageproperties-function)
* [WriteMapOutput](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/writemapoutput-function)
* [WriteURL](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/writeurl-function)
* [WriteMessage](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/writemessage-function)
* [WriteMessageProperties](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/writemessageproperties-function)
* [DatabaseSelect](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/databaseselect-function)
* [DatabaseJoin](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/databasejoin-function)
* [DatabaseInsert](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/databaseinsert-function)
* [DatabaseUpdate](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/8.0-R2026-09/databaseupdate-function)