SQLSERVER 2005中使用sql语句对xml文件和其数据的进行操作(很全

由于数据库对xml数据直接处理有很多优势，05也对这方面加强了功能。下面是一些实例代码，大家可以参考下。

--用SQL多条可以将多条数据组成一棵XML树L一次插入
--将XML树作为varchar参数传入用
--insert xx select xxx from openxml() 的语法插入数据
-----------------------------------导入，导出xml--------------------------

--1导入实例
--单个表
create table Xmltable(Name nvarchar(20),Nowtime nvarchar(20))
declare @s as nvarchar(2000);
set @s = N''

0
0
0
0
0
'';
declare @idHandle as int ;
EXEC sp_xml_preparedocument @idHandle OUTPUT, @s
insert into Xmltable(Name,Nowtime)
select * from openxml(@idHandle,N''/Xmltables/Xmltable'')
with dbo.xmltable
EXEC sp_xml_removedocument @idHandle
select * from Xmltable
-----------------------读入第二个表数据--------------------
create table Xmlta(Name nvarchar(20),Nowtime nvarchar(20))
declare @s as nvarchar(4000);
set @s =N''

0
0

'';
declare @idHandle as int ;
EXEC sp_xml_preparedocument @idHandle OUTPUT, @s
insert into Xmlta(Name,Nowtime)
select * from openxml(@idHandle,N''/Xmltables/Xmlta'')
with dbo.xmlta
EXEC sp_xml_removedocument @idHandle
select * from Xmlta
drop table Xmlta
-----------------------同时读入多表数据----------------
create table Xmlta(Name nvarchar(20),Nowtime datetime)
create table Xmltb(Name nvarchar(20),Nowtime datetime)
declare @s as nvarchar(4000);
set @s =N''

0
0

'';
-- 则插入的数据为null
declare @idHandle as int ;
EXEC sp_xml_preparedocument @idHandle OUTPUT, @s
--表a
insert into Xmlta(Name,Nowtime)
select * from openxml(@idHandle,N''/Xmltables/Xmlta'')
with dbo.Xmlta
--表b
insert into Xmltb(Name,Nowtime)
select * from openxml(@idHandle,N''/Xmltables/Xmltb'')
with dbo.Xmltb
EXEC sp_xml_removedocument @idHandle
select * from Xmlta
select * from Xmltb
drop table Xmlta,Xmltb
--生成xml文件单表
DECLARE @xVar XML
SET @xVar = (SELECT * FROM Xmltable FOR XML AUTO,TYPE)
select @xVar


--1读取xml文件插入表中
DECLARE @hdoc int
DECLARE @doc xml
select @doc=BulkColumn from (SELECT *
FROM OPENROWSET(BULK ''E:\xml.xml'',SINGLE_BLOB) a)b
EXEC sp_xml_preparedocument @hdoc OUTPUT,@doc
SELECT * into #temp
FROM OPENXML (@hdoc,N''/root/dbo.xmltable'')
with (name nvarchar(20),Intro nvarchar(20))
exec sp_xml_removedocument @hdoc
--2读取xml文件插入表中
SELECT * into #temp FROM OPENROWSET(
BULK ''E:\xml.xml'',SINGLE_BLOB) AS x
DECLARE @hdoc int
DECLARE @doc xml
select @doc=BulkColumn from #temp
EXEC sp_xml_preparedocument @hdoc OUTPUT,@doc
SELECT * into #temp2
FROM OPENXML (@hdoc,N''/root/dbo.xmltable'')
with (name nvarchar(20),Intro nvarchar(20))
exec sp_xml_removedocument @hdoc
/*
---空的处理



1
2 NULL
3 c
*/
drop table xmlt
------------------------------------xml数据操作------------------
--类型化的XML
CREATE TABLE xmlt(ID INT PRIMARY KEY, xCol XML not null)
--T-sql生成数据
insert into xmlt values(1,
''
1
2
3
4
5
'')
--dataset生成数据
insert into xmlt values(2,
''

11900-1-11
21900-1-22
31900-1-33
'')
--读取Name=1 的節點，請使用
SELECT xCol.query(''/Xmltables/Xmltable[@Name="1"]'') from xmlt where ID =1
--读取Name=1 的節點值，請使用
SELECT xCol.query(''/Xmltables/Xmltable[@Name="1"]/text()'') from xmlt where ID =1
--读取Name=5 的Name 屬性值，請使用
SELECT xCol.query(''data(/Xmltables/Xmltable[@Name])[5]'') from xmlt where ID =1
--读取所有节点Name
SELECT nref.value(''@Name'', ''varchar(max)'') LastName
FROM xmlt CROSS APPLY xCol.nodes(''/Xmltables/Xmltable'') AS R(nref) where ID=1
--读取所有节点NowTime
SELECT nref.value(''@NowTime'', ''varchar(max)'') LastName
FROM xmlt CROSS APPLY xCol.nodes(''/Xmltables/Xmltable'') AS R(nref) where ID=1
SELECT xCol.query(''data(/Xmltables/Xmltable[@Name=5]/@NowTime)[1]'') from xmlt where ID =1
--读取Name=1 的Name 屬性值
SELECT xCol.value(''data(/Xmltables/Xmltable//Name)[1]'',''nvarchar(max)'') FROM xmlt where ID=2
--读取NowTime=1 的NowTime 屬性值
SELECT xCol.value(''data(/Xmltables/Xmltable/NowTime)[1]'',''nvarchar(max)'') FROM xmlt where ID=2
--SELECT xCol.value(''data(/Xmltables/Xmltable[@Name])[1]'',''nvarchar(max)'') FROM xmlt where ID=2

------------------------------------------函数使用----------------
--query()、exist()
SELECT pk, xCol.query(''/root/dbo.xmltable/name'') FROM docs
SELECT xCol.query(''/root/dbo.xmltable/name'') FROM docs
WHERE xCol.exist (''/root/dbo.xmltable'') = 1
--modify()
UPDATE docs SET xCol.modify(''
insert

Background

after (/doc/section[@num=1])[1]'')
--value()
SELECT xCol.value(''data((/root/dbo.xmltable//name))[2]'',''nvarchar(max)'') FROM docs
where pk=3
--nodes()
SELECT nref.value(''@Name'', ''varchar(max)'') LastName
FROM xmlt CROSS APPLY xCol.nodes(''/Xmltables/Xmltable'') AS R(nref)
--query()、value()、exist() 和nodes()，modify()
SELECT CAST(T.c as xml).query(''/root/dbo.xmltable/name'')
FROM OPENROWSET(BULK ''E:\xml.xml'',SINGLE_BLOB) T(c)