sql - 将sql重写为linq，可能是小菜一碟，但无法理解

Question

我需要在 Linq 中重写这个 sql 语句。

select hand,count(hand) as Hands, deviceid from individualhands
where deviceid = '977aed93-d1f1-4f7a-a6fa-6bc3ea7d863b'
group by hand, deviceid

有人可以帮忙吗？:)

Answer 1

试试这个：

var query = individualHands
    .Where(r => r.deviceid == '977aed93-d1f1-4f7a-a6fa-6bc3ea7d863b')
    .GroupBy(r => new { r.hand, r.deviceid })
    .Select(g => new { hand = g.Key.hand, deviceid = g.Key.deviceid, Count = g.Count() });