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hello everyone and welcome to this video tutorial on sub queries in sql by simply learn in this video we will learn what is a sub query and look at the different types of sub queries then we learn sub queries with select statement followed by sub queries with insert statement moving further we will learn sub queries with the update statement and finally we look at sub queries with delete statement all these we will be doing on our mysql workbench so before i begin make sure to subscribe to the simply learn channel and hit the bell icon to never miss an update so lets start with what is a sub query so a sub query is a select query that is enclosed inside another query so if i show you this is how the basic structure of a sub query looks like so here whatever is present inside the brackets is called as the inner query and whatever is present outside is called the outer query so first the inner query gets executed and the result is returned to the outer query and then the outer query op