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SQL has levels to it: - level 1 SELECT, FROM, WHERE, GROUP BY, HAVING, LIMIT Master these basic keywords and you’ll be well on your way to mastering SQL. - level 2 Mastering JOINs: Most common JOINs: INNER and LEFT Less common JOINs: FULL OUTER Joins you should avoid... show more
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18 years of work never needed to think this deeply … know when not to jump and adopt a solution, check thoroughly and don’t rote learn stuff like this

This post has levels to it. So you never needed level zero?

Querying data is just the tip of the iceberg. INSERT, UPDATE, DELETE, ALTER, CREATE, DROP...

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Great post @EcZachly love it! Perhaps adding example of DDL statements such as Create, Alter, Truncate, Drop and Rename would complete this post in my opinion 🙌

I'm currently at level 3 even though I don't know much about ROWS clause. I'm starting to understand how to actually design the SQL code to get complex outputs out of the table. How important and frequent would you say the content of level 4 is in the industry ?

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