tsql存储过程转换为vb.net：临时表会阻塞吗？

Question

我在存储过程中有以下代码：

select
    i.ItemID
    ,cast(p.PropertyValue as varchar(100)) as Custodian
    ,cast(null as int) as PersonID
    ,cast(null as bit) as Child
into #c 
from tblItem as I
inner join tblExternalData_Matches as m on I.ItemID = m.ItemID
inner join tblItemExtendedProperties as p on I.ItemID = p.ItemID and p.[Application] = 'Import' and p.PropertyName = 'File Owner'
where m.SourceID = @SourceID

--Update PersonID for custodians we already have
update c set
c.PersonID = p.PersonID
from #c as c
inner join tblPerson as p on c.custodian = p.NameDisplay

转换它的内存效率最高的方法是什么？ 我应该只选择数据类型的结果？

Answer 1

DataTable不是最常用的内存类型，但它取决于您将对数据执行的操作。

查看DataReader，了解处理记录集的最有效方法。

这是一个很棒的blog entry，可以比较DataSet和DataReaders，并帮助您决定走哪条路。