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What is a sequential scan in database process?

Remember when you were only having one drawer to store all of your toys and gadgets? Finding your favorite toy car is not hard, right?

Now, imagine you have thousands, or even billions of that drawer. Now, do you think it's easy to find your specific red-toy-car? No, because you have to go through your billions drawers one by one.

You will find it, but it takes time.

That is sequential scan in database process.

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