This repository provides an end-to-end process for building an SQL Azure database, performing data analysis with SQL and Python, and visualizing data with Tableau. Whether you are a data scientist, ...

The lack of information within relational databases expressed as NULL values presents a problem in ensuring the quality of data and the information retrieved by SQL queries. This is so because there ...

Having data and analytics in the cloud can nurture a data culture by removing barriers to access and trust while strengthening data governance. This influences important behavioral changes in how ...

This seems to be because the to_sql method is replacing NaN values with NULLs (probably how it should be) I want the option to insert NaN values and have the database use the DEFAULT value defined in ...

What Is Tableau’s Fundamental Value Based On 2015 Results? The answer should seem all the more important, given the 50% decrease in share price that followed the company’s recent earnings release.

Don't let Null values derail your formulas. See how to use the NZ function to convert the values to zeroes.

On the surface, it may appear that the SQL clauses IN and EXISTS are interchangeable. However, they’re quite different in how they handle NULL values and may give different results. The problem ...