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rdbms - 1. How many customers placed at least 1 order? 2. How many "Real Estate" customers placed an order?

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rdbms - 1. How many customers placed at least 1 order? 2. How many "Real Estate" customers placed an order?

I have created two tables: Orders: CustomerID OrderId OrderDate Revenue

Industry: CustomerID Industry Now I want to write a query for-

  1. How many customers placed at least 1 order?
  2. How many "Real Estate" customers placed an order?

I am trying to write but not able to get correct result. Please help me on this. I am new in coding.


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