Migration data on SQL

从表里面导出数据XML：

-- export declare @xml xml set @xml = (select * from ( select TableName = 'Schema', xmlData = ( select * from [Schema] where id = 337 for xml auto, root('Schemas') ) union select 'SchemaFile', ( select Id, SchemaId, Data = convert(varchar(max), Data), FileName, Fullpath, RelativePath from SchemaFile where SchemaId = 337 for xml auto, root('SchemaFiles') ) ) SchemaExport for xml auto, root('SchemaExports') ) select @xml

将导出XML数据插入到目的表中：

 1 -- now import

 2 

 3 declare @idoc int

 4 

 5       declare @tableName varchar(255)  

 6       declare @xmlData xml                

 7       

 8       declare @mappingExport table (TableName varchar(255), xmlData xml)

 9 

10       exec sp_xml_preparedocument @idoc output, @xml

11       insert into @mappingExport

12       select *

13       from openxml (@idoc, '/SchemaExports/SchemaExport')

14       with (TableName varchar(255),

15               xmlData nvarchar(max))

16       exec sp_xml_removedocument @idoc output 

17       

18       declare exportCursor cursor

19       for select TableName, xmlData 

20       from @mappingExport

21 

22       open exportCursor

23 

24       fetch from exportCursor into @tableName, @xmlData

25 

26       while @@fetch_status <> -1

27       begin

28             exec sp_xml_preparedocument @idoc output, @xmlData

29                   

30             if (@tableName = 'Schema')

31             begin

32                   print 'Copying Schema' 

33 

34                   select *

35                   from openxml (@idoc, '/Schemas/Schema')

36                   with (Id int,

37                         TenantId int,

38                         VersionNo int,

39                         ResponseSchemaId int,

40                         SchemaName nvarchar(200),

41                         SOAPActino varchar(200),

42                         LastUpdatedUTC datetime,

43                         IsCanonical bit,

44                         DocumentType nvarchar(512) )

45             end

46             else if (@tableName = 'SchemaFile')

47             begin

48                   print 'Copying SchemaFile'

49                   select *, datalength(data), convert(xml, data)

50                   from openxml (@idoc, '/SchemaFiles/SchemaFile')

51                   with (Id int,

52                         SchemaId int,

53                         Data varchar(max),

54                         FileName nvarchar(255),

55                         FullPath nvarchar(255),

56                         RelativePath nvarchar(255) )

57             end

58             exec sp_xml_removedocument @idoc 

59             fetch next from exportCursor into @tableName, @xmlData            

60       end   

61       

62 select datalength(data), convert(xml, data)

63 from schemafile

64 where schemaid = 337