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hello everybody and welcome back I am your host of the series Google software engineer Jordan uh I am actually known as the best backend developer in the world due to the sheer size and gravitational force of my ass and of course Iamp;#39;m well-versed in git all commands with the exception of G pulling if you were here for the last video you know that we started to go into what database indexes are and in todayamp;#39;s video Iamp;#39;ll be covering one specific type known as hash indexes so without wasting any more of your time let me go ahead and grab the iPad and we can start scribbling all right welcome back everybody letamp;#39;s go ahead and get started so to review from last video we talked about indexes in general and why we might need them so in that case thereamp;#39;s going to be two reasons hereamp;#39;s number one the first one is O of n reads so o of n reads basically means that uh effectively it ties into reason number two we have to go through all database rows t