最近这段时间在Sql Server 2005下做了很多根据复杂XML文档导入数据表,以及根据数据表生成复杂XML文档的事情(并非 For XML Auto了事),所有的操作都是利用Sql语句,发现Sql Server 2005的XML文档处理能力真的已经很强了,自己也终于开始体会到Sql Server 2005真正的实力了。在这里记录一下这种情况的处理:
有以下一个XML文档:
<
basevendors
>
<
basevendor
name
="Northeast"
taxid
="99999"
description
="Re/Max Northeast"
activevendor
="Y"
apvendornumber
="8888"
>
<
basevendorcontactinfo
>
<
basevendoraddress
addressline1
="2940 Oak St."
City
="Kingwood"
statecode
="TX"
zip
="77339"
country
="USA"
effectivedate
="11/11/2001"
/>
<
basevendoraddress
addressline1
="1849 Kingwood Dr."
City
="Kingwood"
statecode
="TX"
zip
="0"
country
="USA"
/>
</
basevendorcontactinfo
>
</
basevendor
>
<
basevendor
name
="Better Homes & Gardens Rand Realty"
taxid
="321456"
description
="Better Homes & Gardens Rand Realty"
activevendor
="Y"
apvendornumber
="87542"
>
<
basevendorcontactinfo
>
<
basevendoraddress
addressline1
="10 Schriever Lane"
City
="New City"
statecode
="NY"
zip
="10956"
country
="USA"
effectivedate
="11/22/1899"
/>
</
basevendorcontactinfo
>
</
basevendor
>
<
basevendor
name
="Bodell-Van Drimmelen"
taxid
="9856587"
description
="Bodell-Van Drimmelen"
activevendor
="N"
apvendornumber
="22545"
>
<
basevendorcontactinfo
>
<
basevendoraddress
addressline1
="Residential Appraisers, Inc."
City
="Salt Lake City"
statecode
="UT"
zip
="84106"
country
="USA"
effectivedate
="04/29/2003"
/>
<
basevendoraddress
addressline1
="Residential Appraisers, Inc."
City
="Salt Lake City"
statecode
="UT"
zip
="0"
country
="USA"
effectivedate
="04/11/2003"
/>
</
basevendorcontactinfo
>
</
basevendor
>
<
basevendor
name
="Rental Relocation Inc."
taxid
="6589654"
description
="Rental Relocation Inc."
activevendor
="Y"
apvendornumber
="778855"
/>
</
basevendors
>
其中包含主子表关系,主表是basevendor节点的信息,包括name, taxid等内容,子表信息包含在每个basevendor节点下的basevendoraddress节点的属性中,包括addressline1, city等信息。
现在假设有这样一个数据表:
CREATE
TABLE
BaseVendorAndAddress
(
BaseVendorName
VARCHAR
(
50
)
, BaseVendorTaxId
VARCHAR
(
20
)
, AddressLine
VARCHAR
(
100
)
, City
VARCHAR
(
20
)
)
其中前2个字段来自于主表,而后面2个字段来自于子表
如何操作呢?Sql Server 2005太强大了(各位高手请勿蔑视小生这种“没见过世面”的夸张),以下是处理方法:
DECLARE
@XML
XML
SET
@XML
=
'
<basevendors>
... 上面那段XML文档 ...
</basevendors>
'
SELECT
Vendor.value(
'
@name[1]
'
,
'
varchar(50)
'
)
AS
VendorName, Vendor.value(
'
@taxid[1]
'
,
'
varchar(50)
'
)
AS
TaxID
, addr.value(
'
@addressline1[1]
'
,
'
varchar(200)
'
)
AS
AddressLine, addr.value(
'
@City[1]
'
,
'
varchar(10)
'
)
AS
City
FROM
@XML
.nodes(
'
basevendors/basevendor
'
) BV(Vendor)
CROSS
APPLY
BV.Vendor.nodes(
'
basevendorcontactinfo/basevendoraddress
'
) addrs(addr)
利用Sql Server 2005处理XML类型的能力和Apply操作,寥寥几句就解决了。