tx.Statement.Joins = append(tx.Statement.Joins, join{Name: query, Conds: args, JoinType: joinType})
	return
}

// Group specify the group method on the find
//
//	// Select the sum age of users with given names
//	db.Model(&User{}).Select("name, sum(age) as total").Group("name").Find(&results)
func (db *DB) Group(name string) (tx *DB) {
	tx = db.getInstance()

	fields := strings.FieldsFunc(name, utils.IsValidDBNameChar)

		if _, ok := db.Statement.Clauses["GROUP BY"]; !ok {
			delete(tx.Statement.Clauses, "ORDER BY")
			defer func() {
				tx.Statement.Clauses["ORDER BY"] = orderByClause
			}()
		}
	}

	tx.Statement.Dest = count
	tx = tx.callbacks.Query().Execute(tx)

	if _, ok := db.Statement.Clauses["GROUP BY"]; ok || tx.RowsAffected != 1 {
		*count = tx.RowsAffected
	}

	return

		{Name: "having_user_2", Age: 10},
		{Name: "having_user_1", Age: 20},
		{Name: "having_user_1", Age: 30},
	}

	DB.Create(&users)

	rows, err := DB.Select("name, count(*) as total").Table("users").Group("name").Having("name IN ?", []string{users[0].Name, users[1].Name}).Rows()
	if err != nil {
		t.Fatalf("got error %v", err)
	}

	defer rows.Close()
	for rows.Next() {
		var name string
		var total int64