What does a node represent in a Visual Explain diagram?

  • A CPU core utilized during query execution
  • A database transaction
  • A step in the query execution plan
  • A table or index used in the query
In a Visual Explain diagram, a node represents a step in the query execution plan. Each node corresponds to an operation performed during query execution, such as scanning a table or performing a join. Understanding the meaning of each node helps in analyzing and optimizing the query execution plan. 
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