When we talk about data warehouses, we primarily think about large companies and companies that keep their data in the data warehouse and thus take care of both occupational health and safety of their employees. It is important to note that a good part of these concepts are regulated by the legislative provisions of the countries in which data warehouses, but also protection at work are practiced. Data warehouses are an indispensable part of every company’s business. The reason lies in the fact that for business it is necessary to use more and more data - both on the employees themselves and on the business of the company - business analysis, sales and investments, monitoring the progress and growth of the company and many other data that are important for the work and development of the company. One thing is certain, and that is that the data warehouse is almost the same in every country in the world. What is different is legislative regulation that monitors all this. Data warehouses are also coming to the fore when it comes to analyzing occupational diseases. Namely, the Republic of Croatia, more precisely the Croatian Institute for Public Health, owns the Register of Occupational Diseases. That register sought to cover as many occupational diseases as possible and other data relating to those diseases which are either favorable to the occurrence of the disease or essential for the purpose of analyzing the overall results. The fact is that the data warehouse in our country can be used even better to improve occupational safety.