相关疑难解决方法(0)

这是SQL

SELECT tal.TrustAccountValue
FROM TrustAccountLog AS tal
INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID
INNER JOIN Users usr ON usr.UserID = ta.UserID
WHERE usr.UserID = 70402 AND
ta.TrustAccountID = 117249 AND
tal.trustaccountlogid =  
(
 SELECT MAX (tal.trustaccountlogid)
 FROM  TrustAccountLog AS tal
 INNER JOIN TrustAccount ta ON ta.TrustAccountID = tal.TrustAccountID
 INNER JOIN Users usr ON usr.UserID = ta.UserID
 WHERE usr.UserID = 70402 AND
 ta.TrustAccountID = 117249 AND
 tal.TrustAccountLogDate < '3/1/2010 12:00:00 AM'
)

Basicaly有一个Users表,一个TrustAccount表和一个TrustAccountLog表.
用户:包含用户及其详细信息
TrustAccount:用户可以拥有多个TrustAccounts.
TrustAccountLog:包含对所有TrustAccount"移动"的审计.一个
TrustAccount与多个TrustAccountLog项关联.现在这个查询在SQL Server Management …

我在SQL Server 2000上有一个存储过程,它有3个参数.当我使用SqlCommand.ExecuteReader()从DotNet调用存储过程时,大约需要28秒.

当我在SSMS中直接运行相同的查询时,它会立即返回.

当我从存储过程中取出查询并使用DotNet直接运行时,它也会立即返回.

这些是SQL事件探查器会话的结果

SP内部网点

• 持续时间:28030
• 阅读:2663365
• 写道:0

SP内部SSMS

• 持续时间:450
• 阅读:23535
• 写道:65

直接在Dot Net内部查询

• 持续时间:360
• 阅读:24865
• 写道:57

以下事情对我来说很突出:

• SSMS中的统计数据和Dot Net中的直接查询非常相似
• Dot Net SP可以进行大量读取,但不会写入
• 另外两个读取很少,但有几个写入

任何帮助,将不胜感激.

这是SP的略微观察版本:

我怀疑它是一个查询计划问题,因为即使我从DotNet反复运行它,我总是得到相同的结果.

这是SP的一个版本,由于IP问题而略有改变.我希望它仍然有意义:

SELECT 
t1.pkiOrderID,
t1.fkiBasketId,
t1.sOriginBasketCode,
t1.dtDateCreated,
t1.sOrderCode,
t1.fkiUserCde,
t1.fkiOrgCde,
t1.sApprovalPerson,
t1.dtDateApproved,
t1.sRequestNo,
t1.dtRequiredDate,
t1.Requestor,
t1.OnBehalfOf,
t1.OrderDesc,
t1.OrderTypeId,
t1.fkiAgentID,
t1.fkiAgentRegionID,
stat.iStatus,
count(oi.pkiOrderItemId) as OrderItems,
count(wf.fkiOrderId) as WorkflowCount,
t1.Currency_Id,
t1.ExchangeRate,
t1.ref_odr_idn,
t2.sOrderCode as ref_odr_cde,
t1.ref_rfq_nbr,
t1.ref_rfs_nbr,
t1.ref_doc_nbr,
t1.ref_rsn,
t1.ref_forip_cde,
t1.ref_fa_nbr,
t1.odr_sub_typ
FROM    tbl1 t1 INNER JOIN 
tbl1Status stat ON
t1.pkiOrderID = stat.fkiOrderID AND …