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What is a data warehouse? Data warehousing is one of the hottest topics in both business and data science. But if you're new to this field, you're probably wondering what a data warehouse is, why we need it, and how it works. Don't worry, because in 4 minutes you will know the answers to all these questions.

Let's first start with a definition: what is the meaning of the phrase: 'Single source of truth'. In information systems theory, the "single source of truth" is the practice of structuring all the best quality data in one place.

But what if you knew there was one place where you would always have the one source of information? That would be very helpful, wouldn't it? Well, a data warehouse exists to meet that need.

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