# InputOutput and Database

### In this section

* [ReadMapInput](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/readmapinput-function)
* [ReadURL](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/readurl-function)
* [ReadNested](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/readnested-function)
* [ReadMessage](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/readmessage-function)
* [ReadMessageProperties](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/readmessageproperties-function)
* [WriteMapOutput](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/writemapoutput-function)
* [WriteURL](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/writeurl-function)
* [WriteMessage](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/writemessage-function)
* [WriteMessageProperties](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/writemessageproperties-function)
* [DatabaseSelect (deprecated)](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/databaseselect-function)
* [DatabaseJoin (deprecated)](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/databasejoin-function)
* [DatabaseInsert (deprecated)](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/databaseinsert-function)
* [DatabaseUpdate (deprecated)](https://help.qlik.com/talend/en-US/data-mapper-functions-reference-guide/7.3/databaseupdate-function)