Users of relational databases want all the data they need at their fingertips, while the database designers want to responsibly “decompose” the data into the smallest possible and most efficient tables. There’s always a tension between ease and efficiency at scale.
The SQL Join operation satisfyingly bridges this tension, giving you the power to derive tables that contain exactly the data you need.
SQL Join generates a new (temporary or permanent) table from one or more tables by combining columns based on the way the Join is invoked. There’s also a “self-join” variant to groom an unruly table into something more manageable.
Data is the new black gold. Thanks to the rise in data-driven decision making, the demand for data professionals is outpacing the supply — and data architecture is one of the emerging jobs in this field.
The new world of work is changing and new skills will play an important role in your ability to gain entry into the future workforce. With that said, Udacity wants to ensure that you receive the most up-to-date training in the world of tech, and we’re excited to announce that we have refreshed our Data Streaming Nanodegree program.
Data streaming is a big business. Several of your favorite streaming services — Netflix, Hulu, Spotify, etc. — are using and ingesting reams of data on a daily basis. In fact, according to a Grand View Research report the global streaming market was worth $42.6 billion in 2019 and it’s expected to grow more than 20 percent per year and reach a total of $184.3 billion by 2027.
Out of 13 million new jobs that have been created in the United States in the last 10 years, over 8.5 million have required skills in technology. And as the future of work moves forward, the tech skills necessary to succeed in these new roles will only become more advanced. Skilled workers need to be able to work with technology beyond an internet browser or word processing application.
Jobs like Human Resources (HR), that never seemed to need technology before, are now specifically looking for applicants with skills in data analysis. In a survey done by SHRM, over half of survey responders require data analysis when hiring for their HR department.
Have you ever tried to learn something, maybe in a textbook or an online lecture, but not been able to fully grasp the concept until you saw a visual representation? If so, you’re not alone. According to the Social Science Research Network, 65% of people are visual learners. That’s why data visualization is so important — especially for businesses.
Data visualization is a way to represent data in graphs, charts, maps, and infographics. After all, data points in a database in the cloud only go so far. With data visualization, you can spot trends and relationships in large datasets by sight. Companies that collect large amounts of data for processing use these insights to make business decisions that change their course of their future.
While there are tons of tools on the market for data analysis, Tableau is one of the best platforms for business intelligence.