SQL becoming so popular instead of NoSQL. Though NoSQL has benefits, the SQL you cannot remove from your learning list.
I am giving here SQL quiz you can check your knowledge in 3 minutes.
NoSQL pioneer Google writes that their Spanner database is becoming a SQL system (summary). Salesforce uses Artificial Intelligence to translate natural language to SQL. Even some ORM0 vendors say it is better to use SQL. Seems like SQL has a positive vibe.
Also read: 32 complex SQL questions for interviews
The highly popular article “Why SQL is beating NoSQL, and what this means for the future of data” is a very nice write-up of why SQL had become frowned upon, and how it is now gaining new popularity right.
Take SQL Quiz here