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hi friends we are inside our mysql workbench well learn group by commands of mysql so let me just first start with use my tutorial its my database name you can use yours so first let me drop the table if it is existed to reset drop table student fine now i i will just copy the dump of it paste it here now control shift enter i will execute the all the code so now the code is executed now table is ready for me first i will see how to use the group by command usually let us say we want to count the number of students in a particular class here you can see there are name class mark and gender so well say what are the how many numbers of students are there in a particular in all the classes so we want to display the class and the number of students there so we will say select class because we want to display the class column then count count is a function which counts the records so will say all the records you count or if you have a unique id then you can insert the id also instead of