LINQ问题中没有Sql [英] Sql Not In in Linq Issue
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问题描述
我有这个SQL查询.我可以将大多数查询转换为linq,但我不了解如何在此特定查询中实现不在"部分.这是我的查询:
I have this sql query. I can convert most of the query to linq but I don't understand how to implement the "not in" portion in this particular query. Here is my query:
SELECT d.processid,d.name,t.test_name
FROM dc_tp_tprocess d
left outer join dc_tp_tprocedured pd on pd.processid=d.processid
left outer join dc_tp_test t on t.procedureid=pd.procedureid
where d.active='Y' and t.testid=1
and d.processid not in (1,2,6,8,9,10)
order by t.testid,d.processid
推荐答案
就像这样:
int[] tmp=new int[]{1,2,6,8,9,10};
var query=from d in dc_tp_tprocess
join pd in dc_tp_tprocedured on d.processid equals pd.processid into leftGroup1
from pd in leftGroup1.DefaultIfEmpty()
join t in dc_tp_test on pd.procedureid equals t.procedureid into leftGroup2
from t in leftGroup2.DefaultIfEmpty()
orderby t.testid,d.processid
where d.active=="Y" && t.testid==1 && !tmp.Contains(d.processid)
select new {d.processid,d.name,test_name=t==null?"":t.test_name};
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