如何在学说2中使用Group By子句

Question

如何将以下查询转换为doctrine2查询

with using method createQuery() or createQueryBuilder()

select customer,sum(marks) from BlogBundle:Customers group by customer

Answer 1

$qb->select('customer', 'SUM(marks)')->from('BlogBundle:Customers', 'customer')->groupBy('customer.id');