The biggest budget games out there continue to push game consoles’ capabilities. Raw output numbers are only part of the

Note, databases use a query optimizer to optimize the execution of a query. The optimizer might change the order of some operations so that the query runs faster. This diagram is a high-level overview of what is happening behind the scenes.

SELECT customerID, productID, SUM(price) AS sales, SUM(SUM(price)) OVER (PARTITION BY customerID) AS sales_all FROM sales_table GROUP BY customerID, productID ORDER BY customerID, productID

DROP TABLE IF EXISTS sales_table; CREATE TEMPORARY TABLE sales_table ( key varchar(6), customerID varchar(10), productID varchar(10), price float );

I didn’t take the time for a tutorial that would explain the basics and the power of Window Functions. Consequently, I avoided them and the queries became overcomplicated. Then bugs creep in.

Bokeh is another interactive plotting library that was built with modern web-browsing and computing in mind. Similarly to Plot.ly, Bokeh might not be as extendable as something like GGPlot, but presents a host of benefits over the former by being incredibly integrated with Javascript. Every data scientist loves interactive visualizations, and Bokeh often takes this to a very high-level and simple API with stunning results.

For the newest console generation, these aren’t just idle preferences. They could potentially influence buying decisions. If players want to experience super-high-resolution gaming at insanely fast frame rates and with more colors than ever before, then it’s time to upgrade. If not, well, those realistic reflections are still pretty cool.

Disclosure: Bear in mind that some of the links above are affiliate links and if you go through them to make a purchase I will earn a commission. Keep in mind that I link courses because of their quality and not because of the commission I receive from your purchases. The decision is yours, and whether or not you decide to buy something is completely up to you.

For the newest console generation, these aren’t just idle preferences. They could potentially influence buying decisions. If players want to experience super-high-resolution gaming at insanely fast frame rates and with more colors than ever before, then it’s time to upgrade. If not, well, those realistic reflections are still pretty cool.

If the code would simply crash, I’d know I screw it up. Data Scientists need to spend a considerable amount of time on data validation because an SQL query always returns something.

It turned out that many entries in the table 1 and table 2 had string_field column with NULL values. I thought that JOIN would keep records with NULL values because NULL is equal to NULL, isn’t it?

I wrote a query similar at its core to the query in the image above. When I was performing data validation, many records were missing. How is this possible? It is such a simple JOIN!

In the first example, I use 0 for all products that are not from the US, which lowers the overall average price. If there would be many non-US products, the average could get close to 0.

In the second example, I calculate the average price only with products that are sold in the US, which is usually what we want. Note, you don’t need to include ELSE when using CASE WHEN as it defaults to NULL.

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o that than you might believe. The University of Pavia conducted a study monitoring brain chemical makeup in the brains of couples, both at the beginning of a relationship and further along in the established relationship. In the study, the researchers found that early on, the brains of couples experience a release of chemicals that causes euphoria. However, over the first year, this chemical eventually fades.

I would argue that the fact that the SQL queries don’t crash makes the Data Analysis even harder. How many datasets I’ve extracted from the database, that turned out to have wrong or missing data? Many!