GROUP_CONCAT function in MySQL

In MySQL, sometimes we need to fetch the particular column value from multiple rows using the same id i.e. the foreign key that belongs to the primary key of the other table. As such, with the help of the GROUP_CONCAT function in MySQL, we can do this.

This function is used very rarely but it is useful when getting multiple values of the same category and incorporating them into a single cell value. There should be two tables in the database to perform this operation.

The first table contains the parent category or the parent id and the second table contains the information related to its parent id.
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