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now today we're going to look at cross apply and outer apply i'll explain how they differ from regular joints and why we need them [Music] [Music] apply why do we need it so to start things off let's take a look at a simple query the simple left join so as you can see we're just going to join the person table to get their name to the person phone table to get their phone number now we're going to use a left join as i'm sure most of you are familiar with because maybe they're someone that we have a customer that didn't provide their phone number all right so they may not have a record in this table but we still want to return the names of all our customers anyway so let's go ahead and run this we're just going to filter it to for the first 10 customers all right okay and as you can see most customers have a phone number except michael raheem he does not so he does not have a record in the person phone table all right so this just kind of sets the stage um but now let's look at another...