As most of the business data stored in relational databases, learning SQL is essential for anyone wants to be a data analyst or scientist. SQL is the main tool used to manipulate data in relational databases, so mastering SQL is necessary to perform deep data analyses. This course teaches you SQL from scratch till writing complex queries. The course starts with you from the basic to the advanced level. In the beginning you will learn simple SELECT statement to retrieve data and after that increase the level of complexity step by step till learning to build complex queries. using the most important functions, such as: aggregation and date functions at your queries. Furthermore, you will learn joining multiple tables at your queries to retrieve the data you need for your analyses. You will learn sales, customers and inventory analysis. Before that, you learn how to install and use Microsoft SQL Server and Northwind database. In the next section, you will learn about data visualization and using Tableau to create insightful diagrams and charts. You will learn installing Tableau and be comfortable with creating varied diagrams, dashboards and stories and use them for business data analyses. You will learn how to import SELECT results in SQL Server into Tableau and use these data to create insightful diagrams. These diagrams can be very handy in data and business analysis. Enroll in this course to valuable knowledge to yours!