Having a clause allows you to specify conditions that filter which group appears as a result. A where clause places provisions on the selected columns, whereas the having clause puts requirements on groups created by the group b4 clause. The having clause must follow the group by clause in a query, and it must also follow the order by clause is used. A having clause limits the outcomes of a group by in a select expression. The clause is applied to groups of the assembled table as a where clause is applied to a select list. Both of where and having clause are quite comparable and used to restrict rows that are returned in a select query. The having clause is utilized to filter rows after the grouping is performed.