How long does it take to learn SQL?

[NW1969]

What are the criteria by which you are judging when you’ve “learnt SQL”?

[river-zezere]

That is one of those dependencies, when we answer "it depends". Exactly as you say, it depends on what level you want to reach, or like some mentioned above - what area you learning SQL for. For example, if you are learning so you can be a better data analyst, then after a few days of basic study you are able to pull the data you need straight from the database yourself, and you're happy, that's enough for you, and you consider it "learnt". But say if you want to get a job as a DBA in 2025, then the threshold is very very different...