Let’s recap what data types we’ve covered so far:
text values like emails, names, countries etc
integer numbers like 1, 2, 99 or
float 1.123, 129.33333
- Date. Datetime, Interval for dealing with dates, timestamps and time intervals
NULL. No value
All these data types have one thing in common – they hold a single value.
Holding single value is great – it is easy to understand, easy to maintain. It’s a perfect choice for a column which will always have data (for example: email or book title). The price we pay...
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About SQL Habit
Hi, it’s Anatoli, the author of SQL Habit.
SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst and solve real-life challenges from Business, Marketing, and Product Management.
SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work.