# 4.0 Prerequisites

## Install PSQL Command Line Utility

Follow the instruction outlined in the Adobe Experience Platform documentation to install the psql client: [PSQL Install Guide](https://experienceleague.adobe.com/docs/experience-platform/query/clients/psql.html)

## Install Power BI

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**Only for Windows users**
{% endhint %}

[Install Microsoft Power BI](https://experienceleague.adobe.com/docs/experience-platform/query/clients/power-bi.html)

Make sure that you install the exact version of **npgsql** as mentioned on the document, otherwise you will not be able to connect Power BI to Adobe Experience Platform Query Service.

## Install Tableau

For Windows or Mac users

[Install Tableau Desktop](https://experienceleague.adobe.com/docs/experience-platform/query/clients/tableau.html) as per the documentation.

Tableau gives you a 14-day trial period automatically.

If you want to use Tableau beyond those 14 days, you'll need a license key.