SQL "difference between" interview questions (part 1)

In this video, we'll understand some important sql interview questions. These questions are often asked in interview and should be known by anyone who wants to master SQL.
Following are the questions which will be covered in this video:
1. Difference between where and having?
2. Difference between union and union all?
3. Difference between in and exists?

This is part 1 of this video.

Part 2 will be released tomorrow.
In part 2, the following questions will be covered:
4. Difference between group by and order by?
5. Difference between join and sub query?
6. Difference between join and union?



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