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hey my sql learners so in this video we are going to look at basically how table locks works in the context of e-commerce database we created a simple database or schema called dcom store and we created a bunch of tables i used another dummy table to explain transaction isolation levels so if you havent seen my previous material go back and check it out and come back here but then yeah you have four tables four main tables and the main table that we are interested in is products table here and in the products table i inserted a couple of records these are dummy records so i dont have a front end or application running over here so were just looking at database right so what whats going to happen in this tutorial is um so we were going to basically simulate a situation where a seller is trying to update the quantity of the book that he is selling on this website which is this first book actually the common path to uncommon success and then the right now the quantity of this the qu