Sql LINQ-Where子句中具有多个参数的左外部联接
如何在LINQ中执行此SQL查询:Sql LINQ-Where子句中具有多个参数的左外部联接,sql,linq,llblgenpro,Sql,Linq,Llblgenpro,如何在LINQ中执行此SQL查询: select * from chat c left outer join lead s on c.key = s.id where (typeId = 5 AND c.key = @clientId) OR (c.typeId = 4 AND s.clientId = @clientId) 或者这个SQL查询——相同,相同 select * from chat c where (typeId = 5 AND c.key = @clientId) OR (ty
select * from chat c
left outer join lead s on c.key = s.id
where (typeId = 5 AND c.key = @clientId) OR (c.typeId = 4 AND s.clientId = @clientId)
或者这个SQL查询——相同,相同
select * from chat c
where (typeId = 5 AND c.key = @clientId) OR (typeId = 4 AND c.key in (select id from lead where clientId = @clientId))
我所拥有的:
var chatter = (from chat in linq.Chat
join lead in linq.Lead
on chat.key equals lead.Id.ToString() into clientLeads
from cl in clientLeads.Where(l => l.clientId == clientId).DefaultIfEmpty()
where (chat.typeId == 5 && chat.key == clientId.ToString()) ||
(chat.typeId == 4 && chat.key == cl.Id.ToString())
select chat).WithPath(prefetchPath).OrderByDescending(c => c.CreatedDate);
上面的LINQ查询没有从后面的WHERE子句中得到任何结果,我缺少了什么?我将第二个查询转换为LINQ:
var leadIds = linq.Lead.Where(l => l.clientId == clientId.ToString()).Select(l => l.id);
var chatter = from chat in linq.Chat
where (chat.typeId == 5 && chat.key == clientId.ToString()) ||
(chat.typeId == 4 && leadIds.Contains(chat.key));
我将第二个查询翻译为linq:
var leadIds = linq.Lead.Where(l => l.clientId == clientId.ToString()).Select(l => l.id);
var chatter = from chat in linq.Chat
where (chat.typeId == 5 && chat.key == clientId.ToString()) ||
(chat.typeId == 4 && leadIds.Contains(chat.key));
老兄,我真的试过一些非常接近的东西,但我一定把它搞砸了!这管用!老兄,我真的试过一些非常接近的东西,但我一定把它搞砸了!这管用!