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  1. Practice
  2. SQL
  3. Basic Join
  4. Ollivander's Inventory
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Ollivander's Inventory

  • Venkateswaran + 0 comments

    w.coins_needed =(select min(wo.coins_needed) from wands as wo where wo.power=w.power and wo.code=w.code)

    what is the use of w0.power=w.power and w0.code=w.code..? I am highly confused. Help me with this...