# Reading data from different MySQL databases using dynamically loaded connection parameters

The Job in this scenario is made of two subJobs. The first subJob aims at dynamically loading the context parameters from two text files, and the second subJob uses the loaded context parameters to connect to two different databases and to display the content of an existing database table of each of them. With the context settings in the Job, we can decide which database to connect to and choose whether to display the set context parameters on the console dynamically at runtime.

For more technologies supported by Talend, see [Talend components](https://help.qlik.com/talend/r/en-US/7.3/components/context).

### In this section

* [Dropping and linking the components](https://help.qlik.com/talend/en-US/components/7.3/context/tcontextload-tlogrow-tfileinputdelimited-tmysqlinput-dropping-and-linking-components-standard-component-drop)
* [Preparing the contexts and context variables](https://help.qlik.com/talend/en-US/components/7.3/context/tcontextload-tlogrow-tfileinputdelimited-tmysqlinput-preparing-contexts-and-context-variables-standard-component-create)
* [Configuring the components](https://help.qlik.com/talend/en-US/components/7.3/context/tcontextload-tlogrow-tfileinputdelimited-tmysqlinput-configuring-components-standard-component-in)
* [Executing the Job](https://help.qlik.com/talend/en-US/components/7.3/context/tcontextload-tlogrow-tfileinputdelimited-tmysqlinput-executing-job-standard-component-press)

**Related concepts**

[tContextLoad](https://help.qlik.com/talend/en-US/components/7.3/context/tcontextload "Loads a context from a flow.")

**Related information**

[tLogRow](https://help.qlik.com/talend/r/en-US/7.3/components/logs-and-errors/tlogrow)

[tFileInputDelimited](https://help.qlik.com/talend/r/en-US/7.3/components/delimited/tfileinputdelimited)

[tMysqlInput](https://help.qlik.com/talend/r/en-US/7.3/components/mysql/tmysqlinput)