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[Intro music] Hi there, Im Chris Saxon, the SQL wizard. In todays episode, were going to continue looking at ways, we can get all the red sweets out of my party bags here. However, Ive got a specific question I want to answer. Im turning into a bit of a health nut. So, I want to know the total weight of all the red candies, so I can figure out, roughly speaking, how many calories are in them. Were going to take a look at techniques we can use to ensure we answer this question nice and efficiently. Ready. Lets get started. In the previous episode, we looked at methods we can use to just count how many of the sweets were red,and, we saw, that our document here, had all the information we needed. We can just scan down it, counting the total number of red entries. This is what we called an Index Only Scan. This can be docHubly more efficient on both full table scan and an Index Range Scan, where we still gotta actually go to the bags to get the sweets out. However, to answer