将Access数据库移植到Oracle笔记

　　开始移植工作的时候,尝试了很多自动转换工具,包括access通过odbc导出,csv导入等等,发现有一些问题: 例如得到字段类型转换不能满意,象Boolean被变成Char等等.后来开始自己写转换脚本.
　　1 最简单的使用SQL插入.所有的表结构通过手工定义.
　　<%@ LANGUAGE = VBScript CodePage = 936%>
<%
　　dim ConnStr,conn1,conn2,Db
　　Db = "olddb.mdb"
ConnStr = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = " & Server.MapPath(db)
　　Set conn1 = Server.CreateObject("ADODB.Connection")
conn1.open ConnStr
　　Dim SqlDatabaseName,SqlPassword,SqlUsername,SqlLocalName
 SqlPassword = "test"
 SqlUsername = "SYSTEM"
 SqlLocalName = "ORCL"
 ConnStr = "Provider = OraOLEDB.Oracle.1; Persist Security Info=True; User ID = " & SqlUsername & "; Password = " & SqlPassword & "; Data Source = " & SqlLocalName & ";"
　　Set conn2 = Server.CreateObject("ADODB.Connection")
conn2.open ConnStr
　　sql="select * from XXLX"
　　Set rs1 = Server.CreateObject("ADODB.RecordSet")
rs1.Open SQL, Conn1, 1, 1
　　DO WHILE NOT rs1.EOF
      sql = "insert into XXLX (" _
      & "XXLXID" & "," _
      & "BUMEN" & "," _
      & "XXLX" & ")" _
      &"values('"  _
   & rs1("XXLXID") & "','" _
   & rs1("BUMEN") & "','" _
   & rs1("XXLX") & "')"
  
   Response.Write sql & " "
          conn2.execute(sql)
   rs1.MoveNext
LOOP
　　rs1.close
set rs1 = Nothing
　　conn1.close
set conn1=nothing
　　conn2.close
set conn2=nothing
　　%>
　　使用sql方式时候,要注意将字符串里面的'   " 转换掉.
　　If rs1("FILENAME") <> "" Then
filename =  Replace(rs1("FILENAME"),"'","''")
filename =  Replace(filename,"""","""""")
Else
filename = ""
End If
　　2 对于有些text字段很长,而oracle的SQL只能4000字的限制.将所有包含lob的字段通过ado 对拷的方式进行.
　　<%@ LANGUAGE = VBScript CodePage = 936%>
<%
　　dim ConnStr,conn1,conn2,Db,rs1,rs2
　　Db = "db.mdb"
ConnStr = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source = " & Server.MapPath(db)
　　Set conn1 = Server.CreateObject("ADODB.Connection")
conn1.open ConnStr
　　Dim SqlDatabaseName,SqlPassword,SqlUsername,SqlLocalName
 SqlPassword = "test"
 SqlUsername = "SYSTEM"
 SqlLocalName = "ORCL"
 ConnStr = "Provider = OraOLEDB.Oracle; Persist Security Info=True; User ID = " & SqlUsername & "; Password = " & SqlPassword & "; Data Source = " & SqlLocalName & ";"
　　Set conn2 = Server.CreateObject("ADODB.Connection")
conn2.open ConnStr
　　sql="SELECT * FROM MRCH ORDER BY ID ASC"
　　Set rs1 = Server.CreateObject("ADODB.RecordSet")
rs1.Open SQL, Conn1,1,1
　　sql="SELECT USERNAME USERNAME,ADDRESS ADDRESS,FILENAME FILENAME,INFO_TYPE INFO_TYPE,""DATE"" ""DATE"",TITLE TITLE,KEYWORD KEYWORD,SUMMARY SUMMARY,DOMAIN DOMAIN,DEPT DEPT,SENSITIVE SENSITIVE,SCBJ SCBJ,TIME TIME,JHXXLX JHXXLX FROM MRCH"
Set rs2 = Server.CreateObject("ADODB.RecordSet")
rs2.Open SQL, Conn2,1,4
　　Dim i,tmp
i = 0
DO WHILE NOT rs1.EOF
      i= i+1
　　rs2.AddNew
      rs2("USERNAME")=rs1("USERNAME")
      rs2("ADDRESS")=rs1("ADDRESS")
      rs2("FILENAME")=rs1("FILENAME")
      rs2("INFO_TYPE")=rs1("INFO_TYPE")
      rs2("DATE")=rs1("DATE")
      rs2("TITLE")=rs1("TITLE")
      rs2("KEYWORD")=rs1("KEYWORD")
      rs2("SUMMARY")=rs1("SUMMARY")
      rs2("DOMAIN")=rs1("DOMAIN")
      rs2("DEPT")=rs1("DEPT")
      rs2("SENSITIVE")=rs1("SENSITIVE")
      rs2("SCBJ")=rs1("SCBJ")
      rs2("TIME")=rs1("TIME")
      rs2("JHXXLX")=rs1("JHXXLX")
　　Response.Write i & rs1("SUMMARY") & rs1("TIME") &"<br>"
     
     
   rs1.MoveNext
LOOP
　　rs2.updatebatch
     rs2.close
      set rs2 = Nothing
　　rs1.close
set rs1 = Nothing

　　conn1.close
set conn1=nothing
　　conn2.close
set conn2=nothing
　　%>
　　这里有三点要说明
　　1 必须使用oracle自己的oledb,用ms的,有数据类型的问题
　　2 所有的字段必须显示给出,否则oracle 会省略一些字段名: 例如info_type变成IN
　　3 ADO记录必须用1 4打开,批处理模式