Question

我在SQL中编写查询，通过clickCount列

选择前12个访问类别

SELECT top(12) c.Name
FROM Category c
GROUP BY c.Name
ORDER BY SUM(ClickCount) DESC

我需要在linq中实现。到目前为止，我写了这个，但结果并不像预期的那样

var query = _categoryRepository.Queryable()
                .GroupBy(r => r.Name)
                .SelectMany(g => g.OrderBy(r => r.ClickCount))
                .Take(12).ToList();

Answer 1

试试这个：

var query = (from item in _categoryRepository.Queryable()
            group item by item.Name into sub
            orderby sub.Sum(x => x.ClickCount) descending
            select sub).Take(12).ToList();

选择最常访问类别

1 个答案: