主要控件：

ADOConnOrcale: TADOConnection; //连接Oracle ADOConnSQLServer: TADOConnection; //连接SQL Server O1: TADOQuery; //连接Oracle S1: TADOQuery; //连接SQL Server S2: TADOQuery; //连接SQL Server ProgressBar1: TProgressBar; //进度条 Memo1: TMemo; //显示出错信息 EdtServer: TEdit; //服务器 EdtDataBase: TEdit; //数据库名称 EdtUser: TEdit; //用户名 EdtPass: TEdit; //口令 Button1: TButton; //执行按钮 //常量 const ORAConnStr=’Provider=MSDAORA.1;Data Source=%S;User ID=%S;Password=%S;Persist Security Info=True’; SQLConnStr=’Provider=SQLOLEDB.1;Data Source=%S;Initial Catalog=%S;User ID=%S;Password=%S;Persist Security Info=False’;

在执行前先进行Oracle和SQL Server数据库的连接。

连接Oracle:

ADOConnOrcale.ConnectionString :=Format ORAConnStr,[trim EdtDataBase.Text), trim EdtUser.Text),trim EdtPass.Text)]); try ADOConnOrcale.Open; MsgBox ’Oracle数据库连接成功！’); Except MsgBox ’Oracle数据库连接失败！’); end;

连接SQL Server:

ADOConnSQLServer.ConnectionString :=Format SQLConnStr,[trim EdtServer.Text), trim EdtDataBase.Text),trim EdtUser.Text),trim EdtPass.Text)]); try ADOConnSQLServer.Open; MsgBox ’SQL Server数据库连接成功！’) except MsgBox ’SQL Server数据库连接失败！’); end;

主要执行代码，比较乱，没有整理，不过实现功能就行了。

procedure TForm1.Button1Click Sender: TObject); var i:Integer; FieldN, tableN, fieldM,aa:String; begin if Not ADOConnOrcale.Connected then begin MsgBox ’请先连接Oracle数据库！’); exit; end; if not ADOConnSQLServer.Connected then begin MsgBox ’请先连接SQL Server数据库！’); exit; end; Screen.Cursor :=crHourGlass; try o1.Close; O1.SQL.Clear; //取oracle表用户budget的所有主键约束信息 o1.SQL.Text :=’ select a.CONSTRAINT_NAME,a.CONSTRAINT_TYPE,a.TABLE_NAME, b.COLUMN_NAME,b.position ’+ ’ from USER_CONSTRAINTS a,USER_CONS_COLUMNS b where a.CONSTRAINT_NAME=b.CONSTRAINT_NAME ’+ ’ and a.table_name=b.table_name and constraint_type=’’P’’ and a.owner=b.owner ’+ ’ and lower a.owner)=’’budget’’ order by a.table_name,b.position ’; O1.open; tableN:=’’; O1.First; ProgressBar1.Max:=O1.RecordCount; ProgressBar1.Min:=0; ProgressBar1.Step:=1; ProgressBar1.Visible :=true; for i:=0 to O1.RecordCount -1 do begin s2.Close; S2.SQL.Clear; //判断SQL Server表是否存在当前的字段信息 S2.SQL.Text:=’SELECT a.name AS tanme, b.* FROM sysobjects a INNER JOIN ’+ ’ syscolumns b ON a.id = b.id ’+ ’ WHERE  a.xtype = ’’U’’) AND  a.name = ’’’+O1.fieldbyname ’table_name’).AsString+’’’’+ ’) and b.name= ’’’+O1.fieldbyname ’COLUMN_NAME’).AsString+’’’’+ ’ ORDER BY b.id’; S2.Open; //不存在，输出表明和字段名 if s2.RecordCount<=0 then begin Memo1.Text:=Memo1.Text+#13+’表：’’’+O1.fieldbyname ’table_name’).AsString+’’’’+ ’ 字段：’’’+O1.fieldbyname ’COLUMN_NAME’).AsString+’’’ 不存在！’; O1.Next; tableN:=’’; FieldN:=’’; Continue; end; //是当前表，循环读取主键信息 if  tableN=’’) or  tableN= O1.fieldbyname ’table_name’).AsString) then begin FieldN:=FieldN+’[’+O1.fieldbyname ’COLUMN_NAME’).AsString+’],’;//表明相同或初试时 tableN:= O1.fieldbyname ’table_name’).AsString; end else begin with S1 do begin try //取SQL Server表的主键信息 Close; sql.Clear; sql.Text:=’SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE TABLE_NAME=’’’+tableN+’’’’; Open; first; aa:=fieldbyname ’constraint_name’).AsString; //如果该主键在SQL表中已存在，删除该主键信息,重建该表主键 if recordcount>0 then begin sql.Clear; SQL.Text:=’ALTER TABLE ’+tableN+’ DROP CONSTRAINT ’+aa; //删除主键 ExecSQL; end; SQL.Clear; //COLUMN_NAME SQL.Text:=’ALTER TABLE ’+tableN+’ WITH NOCHECK ADD ’+ ’ CONSTRAINT [PK_’+tableN+’] PRIMARY KEY NONCLUSTERED ’+ ’   ’+ copy FieldN,1,length FieldN)-1)+ ’ )’; ExecSQL; FieldN:=’[’+O1.fieldbyname ’COLUMN_NAME’).AsString+’],’; tableN:= O1.fieldbyname ’table_name’).AsString; Except Memo1.Text :=Memo1.Text+’表： ’+tableN+’ 字段： ’+FieldN+’ 导入出错！’; exit; end; end; end; ProgressBar1.StepIt; Application.ProcessMessages; O1.Next; end; MsgBox ’导入完成！’); finally Screen.Cursor :=crDefault; ProgressBar1.Visible :=False; end; end;