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I have questions for SQL What function does a where clause serve in a SQL query? What is the difference between a left join and

I have questions for SQL

  1. What function does a where clause serve in a SQL query?
  2. What is the difference between a left join and an inner join?
  3. Why do data base designers perform normalization?
  4. Describe in your words what a group by column list function is?
  5. What is the default order of the order by clause?
  6. Describe a union all and its function?
  7. What is an alias used for?

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