Question

您好我有以下存储过程，使用用户定义的表类型工作正常。

ALTER procedure [dbo].[wl]
@test [dbo].[testType] readonly 
 as 
Begin
merge into t_values as Target
using @test as Source 
on Target.Id =Source.Id
when matched then 
update set target.Num=Source.Num
when not matched then 
insert (Id,Num)
values (Source.Id,  Source.Num);
End

我还有两个表test2和test3，我需要从源代码更新一些值。我不知道怎么能这样做。基本上我的目标是当一个条件匹配更新或因为外键关系而将值插入所有三个表时。请让我知道我该怎么做。谢谢

Answer 1

您需要使用“output”子句来捕获插入行后的行的“键”.......

这是一个例子......不是完全匹配....但显示了这个想法。

http://granadacoder.wordpress.com/2008/12/10/sqlserver20052008-output-clause-in-insertupdatedelete-statements/

编辑：

这是我做的一个例子.......我插入“Person”（父实体）和一些电子邮件地址（子实体）。我粉碎了xml，你的数据表应该是相似的。

关键是我“审计”（带有输出子句）生成的IDENTITY，我插入一个Person .....但我保留了该信息与自然唯一标识符（本例中的SSN）。当我插入电子邮件地址时，我已经插入了人员的IDENTITY。

我的#TempTables将成为你最终解决方案中的“真正的桌子”。我的@VariableTable是“审计”表，用于收集和存储“output”子句收集的信息。

IF OBJECT_ID('tempdb..#DestinationPersonParentTable') IS NOT NULL
begin
        drop table #DestinationPersonParentTable
end



IF OBJECT_ID('tempdb..#DestinationEmailAddressPersonChildTable') IS NOT NULL
begin
        drop table #DestinationEmailAddressPersonChildTable
end



CREATE TABLE #DestinationPersonParentTable
(
PersonParentSurrogateIdentityKey int not null identity (1001, 1), 
SSNNaturalKey int, 
HireDate datetime
)



declare @PersonOutputResultsAuditTable table
(
SSNNaturalKey int, 
PersonParentSurrogateIdentityKeyAudit int
)





CREATE TABLE #DestinationEmailAddressPersonChildTable
(
DestinationChildSurrogateIdentityKey int not null identity (3001, 1), 
PersonParentSurrogateIdentityKeyFK int, 
EmailAddressValueNaturalKey varchar(64),
EmailAddressType int
)





-- Declare XML variable

DECLARE @data XML;

-- Element-centered XML

SET @data = N'
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <Person>
        <SSN>222222222</SSN>
        <HireDate>2002-02-02</HireDate>
    </Person>

    <Person>
        <SSN>333333333</SSN>
        <HireDate>2003-03-03</HireDate>
    </Person>

    <EmailAddress>
        <SSNLink>222222222</SSNLink>
        <EmailAddressValue>g@g.com</EmailAddressValue>
        <EmailAddressType>1</EmailAddressType>
    </EmailAddress>

    <EmailAddress>
        <SSNLink>222222222</SSNLink>
        <EmailAddressValue>h@h.com</EmailAddressValue>
        <EmailAddressType>2</EmailAddressType>
    </EmailAddress>

    <EmailAddress>
        <SSNLink>333333333</SSNLink>
        <EmailAddressValue>a@a.com</EmailAddressValue>
        <EmailAddressType>1</EmailAddressType>
    </EmailAddress>

    <EmailAddress>
        <SSNLink>333333333</SSNLink>
        <EmailAddressValue>b@b.com</EmailAddressValue>
        <EmailAddressType>2</EmailAddressType>
    </EmailAddress>

</root>

';




INSERT INTO #DestinationPersonParentTable ( SSNNaturalKey ,  HireDate )

output inserted.SSNNaturalKey , inserted.PersonParentSurrogateIdentityKey  into @PersonOutputResultsAuditTable ( SSNNaturalKey , PersonParentSurrogateIdentityKeyAudit)

SELECT T.parentEntity.value('(SSN)[1]', 'INT') AS SSN,
       T.parentEntity.value('(HireDate)[1]', 'datetime') AS HireDate
FROM @data.nodes('root/Person') AS T(parentEntity)
/* add a where not exists check on the natural key */
where not exists (
    select null from #DestinationPersonParentTable innerRealTable where innerRealTable.SSNNaturalKey = T.parentEntity.value('(SSN)[1]', 'INT') )
;

/* Optional.  You could do a UPDATE here based on matching the #DestinationPersonParentTableSSNNaturalKey = T.parentEntity.value('(SSN)[1]', 'INT')
You could Combine INSERT and UPDATE using the MERGE function on 2008 or later.
 */


select 'PersonOutputResultsAuditTable_Results' as Label, * from @PersonOutputResultsAuditTable


INSERT INTO #DestinationEmailAddressPersonChildTable (  PersonParentSurrogateIdentityKeyFK ,  EmailAddressValueNaturalKey , EmailAddressType )
SELECT  par.PersonParentSurrogateIdentityKeyAudit , 
        T.childEntity.value('(EmailAddressValue)[1]', 'varchar(64)') AS EmailAddressValue,
        T.childEntity.value('(EmailAddressType)[1]', 'INT') AS EmailAddressType
FROM @data.nodes('root/EmailAddress') AS T(childEntity)
/* The next join is the "trick".  Join on the natural key (SSN)....**BUT** insert the PersonParentSurrogateIdentityKey into the table */
join @PersonOutputResultsAuditTable par on par.SSNNaturalKey = T.childEntity.value('(SSNLink)[1]', 'INT')
where not exists (
    select null from #DestinationEmailAddressPersonChildTable innerRealTable where innerRealTable.PersonParentSurrogateIdentityKeyFK = par.PersonParentSurrogateIdentityKeyAudit AND  innerRealTable.EmailAddressValueNaturalKey = T.childEntity.value('(EmailAddressValue)[1]', 'varchar(64)'))
;



print '/#DestinationPersonParentTable/'
select * from #DestinationPersonParentTable


print '/#DestinationEmailAddressPersonChildTable/'
select * from #DestinationEmailAddressPersonChildTable


select SSNNaturalKey , HireDate , '---' as Sep1 , EmailAddressValueNaturalKey , EmailAddressType , '---' as Sep2, par.PersonParentSurrogateIdentityKey as ParentPK , child.PersonParentSurrogateIdentityKeyFK as childFK from #DestinationPersonParentTable par join #DestinationEmailAddressPersonChildTable child
on par.PersonParentSurrogateIdentityKey = child.PersonParentSurrogateIdentityKeyFK



IF OBJECT_ID('tempdb..#DestinationPersonParentTable') IS NOT NULL
begin
        drop table #DestinationPersonParentTable
end


IF OBJECT_ID('tempdb..#DestinationEmailAddressPersonChildTable') IS NOT NULL
begin
        drop table #DestinationEmailAddressPersonChildTable
end

从用户定义的表更新多个表

1 个答案: