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What should be done to improve in SQL and the field of data science?

LUCA

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Greetings, I am studying remote management information systems. As the course materials and videos were not sufficient, I attended a SQL course opened by the Ministry of Education. The course will last a total of 2 weeks, but the instructor covered a lot of topics such as creating relational tables, functions, procedures, check constraints, and where to use them and how to implement them. However, when I looked at some interview questions, I realized they were quite challenging. By the way, I am still at a beginner level in the software field, we can say that this is the first language I have learned. How can I further improve myself in SQL and other areas of data science? I need your advice on this.
 

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