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Oracle

1Z0-117 · Question #92

Examine the query and its execution plan: Which statement is true regarding the execution plan?

The correct answer is A. This query first fetches rows from the CUSTOMERS table that satisfy the conditions, and then the join. See the full explanation below for the reasoning.

Question

Examine the query and its execution plan:

Which statement is true regarding the execution plan?

Exhibit

1Z0-117 question #92 exhibit

Options

  • AThis query first fetches rows from the CUSTOMERS table that satisfy the conditions, and then the join
  • BThe query fetches rows from CUSTOMERS and ORDERS table simultaneously, and filters the rows
  • CThe query first fetches rows from the ORDERS table that satisfy the conditions, and then the join returns
  • DThe query first joins rows from the CUSTOMERS and ORDERS tables and returns NULL for the ORDERS

How the community answered

(30 responses)
  • A
    80% (24)
  • B
    3% (1)
  • C
    3% (1)
  • D
    13% (4)

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