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In database management an aggregate function is a function where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement such as a set, a bag or a list. Common aggregate functions include : Average() (i.e., arithmetic mean)
Using group by without an aggregate function. This doesnât really make sense, since the purpose of âgroup byâ is to group records when you are using an aggregate function, such as sum. e.g. This entry was posted in MySQL and tagged MySQL. Bookmark the permalink.