在LINQ中转换SQL查询并选择计数

Question

我有2个SQL查询我试图使用linqer转换但没有结果。查询如下：

select distinct a.DOCID,
(select dcrea from mstdocs where DOCID = a.docid and vtype = 'table') DOC_DATE,
(select dcrea from mstdocs where DOCID= a.docid and vtype = 'read' and VTAID = '2') Read_DATE
from mstdocs a, mstdocstats b
where a.docid = b.docid
and a.vtaid = '2'
and a.vtype = 'read'
and DATEPART(mm,a.DCREA)  = '06'
and DATEPART(yyyy,a.DCREA) = '2016'
and a.docid in 
(
select distinct a.docid 
from mstdocs a, mstdocstats b
where a.docid = b.docid
and a.vtype = 'table'
and DATEPART(mm,a.DCREA)  = '06'
and DATEPART(yyyy,a.DCREA) = '2016'
)


select distinct a.docid
from mstdocs a, mstdocstats b
where a.docid = b.docid
and (select count(*) from mstdocs docs where docs.DOCID = a.docid and docs.vtaid = '2') = 1

我尝试将第一个查询分成两部分

• var a =（来自mstdocstats中的b）                          在a.docid上加入一个mstdocs等于b.docid                          其中a.vtype.Equals（“表”）                          ＆安培;＆安培; a.DCREA.Month =='06'＆amp;＆amp; a.DCREA.Year =='2016'                          选择a.docid）.Distinct（）。ToList（）;

• var b =（来自mstdocstats中的b                               在a.docid上加入一个mstdocs等于b.docid                               其中a.Contains（a.docid）                               选择新{                                docid = a.docid，                              DOC_DATE =（来自mstdocs中的mstdoc，其中a.docid == mstdoc.docid＆amp;＆amp; mstdoc.vtype ==“table”选择
  mstdoc.DCREA），
                                 Read_DATE =（来自mstdocs中的mstdoc，其中a.docid == mstdoc.docid＆amp;＆amp; mstdoc.vtype ==“read”＆amp;＆amp;
  mstdoc.vtaid ==“2”选择mstdoc.DCREA）}）。ToList（）;

但是变成了错误，任何人都可以告诉我哪里出错了？

感谢您的回答...