asp.net開(kāi)發(fā)sql server轉(zhuǎn)換成oracle的方法詳解

更新時(shí)間：2017年08月24日 10:32:09 作者：老-顧

這篇文章主要給大家介紹了關(guān)于asp.net開(kāi)發(fā)中sql server轉(zhuǎn)換成oracle的相關(guān)資料，文中通過(guò)示例代碼和圖文將實(shí)現(xiàn)的步驟一步步介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面來(lái)一起學(xué)習(xí)學(xué)習(xí)吧。

前言

因?yàn)榍岸螘r(shí)間我們公司項(xiàng)目要把sql server 轉(zhuǎn)oracle，發(fā)現(xiàn)網(wǎng)上這方面的資料較少，所以在這里分享一下心得，也記錄一下問(wèn)題，下面話不多說(shuō)了，來(lái)一起看看詳細(xì)的介紹：

開(kāi)始我研究了一段時(shí)間然后下載了

oracle 11g 版本和 PL/SQL（客戶端）和sql server 不同的是 oracle 沒(méi)有自己的客戶端需要用第三方的軟件運(yùn)行 PL/SQL 就是一個(gè) sqldeveloper 也是一個(gè)，PL/SQL 我覺(jué)得比較穩(wěn)定一點(diǎn)。但是2個(gè)都安裝的話剛好互補(bǔ)了

oracle 容易出現(xiàn) 無(wú)監(jiān)聽(tīng) 什么的錯(cuò)誤可以參考

http://chabaoo.cn/article/91184.htm

然后再用

創(chuàng)建表空間和用戶這些網(wǎng)上都找得到的

好了東西都安裝好了下面開(kāi)始 sql server 轉(zhuǎn) oracle

首先是數(shù)據(jù)庫(kù)的轉(zhuǎn)換我試了很多種方式，都是多多少少都是有點(diǎn)問(wèn)題，因?yàn)槭?個(gè)不同的數(shù)據(jù)庫(kù)，最后我還是決定自己寫(xiě)個(gè)程序轉(zhuǎn)換

代碼貼出來(lái)

鏈接字符串

<add key="OracleConnectionString" value="Password=123;User ID=SA;Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost )(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=ORCL)))"/>
 
 <add key="SqlServerConnectionString" value="server=localhost;database=Table;uid=sa;pwd=123"/>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OracleClient;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TransplantSQL
{
 public partial class Form1 : Form
 {
 public static string OracleConnectionString = System.Configuration.ConfigurationSettings.AppSettings["OracleConnectionString"];
 public static string SqlServerConnectionString = System.Configuration.ConfigurationSettings.AppSettings["SqlServerConnectionString"];
 public Form1()
 {
  InitializeComponent();
 }

 private void button2_Click(object sender, EventArgs e)
 {
  OracleConnection con = new OracleConnection(OracleConnectionString);
  try
  {
  con.Open();
  if (con.State == System.Data.ConnectionState.Open)
  {
   label5.Text = "連接成功";
  }
  }
  catch (OracleException se)
  {
  label5.Text = "連接失敗";
  }

  finally
  {
  con.Close();
  }
 }

 private void button3_Click(object sender, EventArgs e)
 {
  SqlConnection con = new SqlConnection(SqlServerConnectionString);
  try
  {
  con.Open();
  if (con.State == System.Data.ConnectionState.Open)
  {
   label4.Text = "連接成功";
  }
  }
  catch (SqlException se)
  {
  label4.Text = "連接失敗";
  }

  finally
  {
  con.Close();
  }
 }

 private void button1_Click(object sender, EventArgs e)
 {
  if (textBox1.Text == "")
  {
  DataTable tablenames = GetTableNames();
  foreach (DataRow item in tablenames.Rows)
  {
   string tablename = item["Name"].ToString().ToUpper();
   setdata(tablename);
  }
  }
  else
  {
  setdata(textBox1.Text);
  }

  label2.Text = "成功";
 }

 private static void setdata(string tablename)
 {
  // 查找有沒(méi)有此表 如果沒(méi)有就加
  int et = Convert.ToInt32(GetSingle("select count(*) from user_tables where table_name = '" + tablename + "'"));
  if (et <= 0)
  {
  DataTable tableInfo = GetTableInfo(tablename);
  string addtablesql = "CREATE TABLE {0}({1})";
  string cs = string.Empty;
  string biaoshi = string.Empty;
  foreach (DataRow citem in tableInfo.Rows)
  {
   cs += citem["字段名"].ToString();
   if (citem["類型"].ToString() == "int" || citem["類型"].ToString() == "bit" || citem["類型"].ToString() == "decimal")
   {
   cs += " NUMBER(" + (Convert.ToInt32(citem["長(zhǎng)度"]) > 38 ? 38 : Convert.ToInt32(citem["長(zhǎng)度"])) + (Convert.ToInt32(citem["小數(shù)位數(shù)"])>0?(","+Convert.ToInt32(citem["小數(shù)位數(shù)"])):"") + ")";
   }
   else if (citem["類型"].ToString() == "nvarchar" || citem["類型"].ToString() == "float")
   {
   cs += " VARCHAR2(" + (Convert.ToInt32(citem["長(zhǎng)度"]) == -1 ? 4000 : Convert.ToInt32(citem["長(zhǎng)度"]) * 2) + ")";
   }
   else if (citem["類型"].ToString() == "datetime")
   {
   cs += " DATE";
   }
   
   cs += citem["主鍵"].ToString() == "1" ? " primary key " : "";
   if (citem["標(biāo)識(shí)"].ToString() == "1")
   {
   biaoshi = citem["字段名"].ToString();
   }
   cs += citem["默認(rèn)值"].ToString() != "" ? " default " + citem["默認(rèn)值"].ToString() + " " : "";
   cs += citem["允許空"].ToString() == "1" ? "," : " NOT NULL,";
  }
  cs = cs.Substring(0, cs.Length - 1);
  string tempsql = string.Format(addtablesql, tablename, cs);
  GetSingle(tempsql);
  if (biaoshi != string.Empty)
  {
   #region 判斷是否有序列號(hào) 沒(méi)有就創(chuàng)建 就是自動(dòng)標(biāo)識(shí)
   int xuliehao = 0;
   try
   {
   xuliehao = Convert.ToInt32(GetSingle(string.Format(@"select Seq_{0}.nextval from sys.dual", tablename)));
   }
   catch { }
   if (xuliehao <= 0)
   {
   #region 為了讓序列不重復(fù) 取最大值為min 值
   int max = Convert.ToInt32(GetSingle(string.Format("select max({1}) from {0}", tablename, biaoshi),null));
   #endregion
   string sequence = string.Format(@"create sequence Seq_{0} start with {1} increment by 1 nomaxvalue minvalue 1 nocycle nocache", tablename, (max+1));//創(chuàng)建標(biāo)識(shí)
   GetSingle(sequence);
   }
   #endregion
   #region 創(chuàng)建序列的觸發(fā)器
   string chufaqisql = string.Format(@"CREATE OR REPLACE TRIGGER T_{0} 
      BEFORE INSERT ON {0} FOR EACH ROW WHEN (new.{1} is null)
      begin
      select Seq_{0}.nextval into:new.{1} from dual;
      end;", tablename, biaoshi);//創(chuàng)建觸發(fā)器
   GetSingle(chufaqisql);
   #endregion
   #region 創(chuàng)建唯一約束
   //string weiyisql = string.Format(@"create unique index U_{0} on {0} ({1})", tablename, biaoshi);
   //GetSingle(weiyisql);
   #endregion
  }
  //int count = Convert.ToInt32(GetSingle("SELECT count(1) FROM " + tablename));
  //if (count < 10000)
  //{
  DataSet ds = Query("SELECT * FROM " + tablename);
  DataTable dt = ds.Tables[0];
  string columnsNames = string.Empty;
  string values = string.Empty;
  for (int i = 0; i < dt.Columns.Count; i++)
  {
   columnsNames += dt.Columns[i].ColumnName + ",";

  }
  columnsNames = columnsNames.Substring(0, columnsNames.Length - 1);
  foreach (DataRow dr in dt.Rows)
  {
   values = string.Empty;
   for (int i = 0; i < dt.Columns.Count; i++)
   {
   if (dr[i] != DBNull.Value)
   {
    if (dr[i].ToString() != "")
    {
    if (dt.Columns[i].DataType == Type.GetType("System.Double")
     || dt.Columns[i].DataType == Type.GetType("System.Decimal")
     || dt.Columns[i].DataType == Type.GetType("System.Int32"))
    {
     values += dr[i] + ",";
    }
    else if (dt.Columns[i].DataType == Type.GetType("System.String"))
    {
     values += "'" + dr[i].ToString().Replace('\'', '‘') + "',";
    }
    else if (dt.Columns[i].DataType == Type.GetType("System.DateTime"))
    {
     values += "to_date('" + dr[i] + "','YYYY/MM/DD HH24:MI:SS'),";
    }
    else if (dt.Columns[i].DataType == Type.GetType("System.Boolean"))
    {
     if (dr[i].ToString() == "False")
     {
     values += "0,";
     }
     else { values += "1,"; }
    }
    }
    else
    {
    values += "chr(32),";
    }
   }
   else
   {
    values += "NULL,";
   }
   }
   values = values.Substring(0, values.Length - 1);
   string osql = "Insert into " + tablename + "(" + columnsNames + ") values(" + values + ")";
   GetSingle(osql);
  }
  //}
  }
 }

 private static DataTable GetTableNames()
 {
  string sql = string.Format(@"SELECT Name FROM SysObjects Where XType='U' ORDER BY Name");
  DataSet ds = Query(sql);
  return ds.Tables[0];
 }
 private static DataTable GetTableInfo(string tableName)
 {
  string sql = string.Format(@"SELECT (case when a.colorder=1 then d.name else null end) 表名, 
  a.colorder 字段序號(hào),a.name 字段名,
  (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '1'else '' end) 標(biāo)識(shí), 
  (case when (SELECT count(*) FROM sysobjects 
  WHERE (name in (SELECT name FROM sysindexes 
  WHERE (id = a.id) AND (indid in 
  (SELECT indid FROM sysindexkeys 
  WHERE (id = a.id) AND (colid in 
  (SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name))))))) 
  AND (xtype = 'PK'))>0 then '1' else '' end) 主鍵,b.name 類型,a.length 占用字節(jié)數(shù), 
  COLUMNPROPERTY(a.id,a.name,'PRECISION') as 長(zhǎng)度, 
  isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0) as 小數(shù)位數(shù),(case when a.isnullable=1 then '1'else '' end) 允許空, 
  REPLACE(REPLACE(isnull(e.text,''),'(',''),')','') 默認(rèn)值,isnull(g.[value], ' ') AS [說(shuō)明]
  FROM syscolumns a 
  left join systypes b on a.xtype=b.xusertype 
  inner join sysobjects d on a.id=d.id and d.xtype='U' and d.name<>'dtproperties' 
  left join syscomments e on a.cdefault=e.id 
  left join sys.extended_properties g on a.id=g.major_id AND a.colid=g.minor_id
  left join sys.extended_properties f on d.id=f.class and f.minor_id=0
  where b.name is not null
  And d.name='{0}' 
  order by a.id,a.colorder", tableName);
  DataSet ds = Query(sql);
  return ds.Tables[0];
 }

 public static DataSet Query(string SQLString)
 {
  using (SqlConnection connection = new SqlConnection(SqlServerConnectionString))
  {
  DataSet ds = new DataSet();
  try
  {
   connection.Open();
   SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
   command.Fill(ds, "ds");
  }
  catch (System.Data.SqlClient.SqlException ex)
  {
   throw new Exception(ex.Message);
  }
  return ds;
  }
 }

 public static object GetSingle(string SQLString)
 {
  using (OracleConnection connection = new OracleConnection(OracleConnectionString))
  {
  using (OracleCommand cmd = new OracleCommand())
  {
   try
   {
   PrepareCommand(cmd, connection, null, SQLString, null);
   object obj = cmd.ExecuteScalar();
   cmd.Parameters.Clear();
   if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
   {
    return null;
   }
   else
   {
    return obj;
   }
   }
   catch (OracleException e)
   {
   throw e;
   }
  }
  }
 }

 private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
 {
  if (conn.State != ConnectionState.Open)
  conn.Open();
  cmd.Connection = conn;
  cmd.CommandText = cmdText;
  if (trans != null)
  cmd.Transaction = trans;
  cmd.CommandType = CommandType.Text;//cmdType;
  if (cmdParms != null)
  {


  foreach (OracleParameter parameter in cmdParms)
  {
   if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
   (parameter.Value == null))
   {
   parameter.Value = DBNull.Value;
   }
   cmd.Parameters.Add(parameter);
  }
  }
 }

 public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
 {
  using (SqlConnection connection = new SqlConnection(SqlServerConnectionString))
  {
  using (SqlCommand cmd = new SqlCommand())
  {
   try
   {
   PrepareCommand(cmd, connection, null, SQLString, cmdParms);
   object obj = cmd.ExecuteScalar();
   cmd.Parameters.Clear();
   if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
   {
    return null;
   }
   else
   {
    return obj;
   }
   }
   catch (System.Data.SqlClient.SqlException e)
   {
   throw e;
   }
  }
  }
 }

 private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
 {
  if (conn.State != ConnectionState.Open)
  conn.Open();
  cmd.Connection = conn;
  cmd.CommandText = cmdText;
  if (trans != null)
  cmd.Transaction = trans;
  cmd.CommandType = CommandType.Text;//cmdType;
  if (cmdParms != null)
  {


  foreach (SqlParameter parameter in cmdParms)
  {
   if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
   (parameter.Value == null))
   {
   parameter.Value = DBNull.Value;
   }
   cmd.Parameters.Add(parameter);
  }
  }
 }
 }
}

這個(gè)代碼適應(yīng)于我的數(shù)據(jù)庫(kù)轉(zhuǎn)換大家需要的話可以修改一下

其中oracle 沒(méi)有自增長(zhǎng)的，，而是序列另外序列可以用觸發(fā)器觸發(fā) 麻煩了一點(diǎn) 整的來(lái)說(shuō) 還算好啦

然后就是把我原來(lái)的程序字符串鏈接改成oracle 的鏈接上面貼出來(lái)了

首先System.Data.SqlClient;引用改成System.Data.OracleClient;

然后在看報(bào)錯(cuò)的地方通通改掉就行了從Sql 改為 Oracle 就行

然后我貼出一些不報(bào)錯(cuò) 但是sqlserver 和oracle 不同的地方

查詢前多少條數(shù)據(jù)

select * from (SELECT * FROM Table) where rownum<100

其他格式轉(zhuǎn)化成字符串格式

select to_char(其他格式,字符串格式) 如select to_char(sysdate,'yyyy-mm-dd') from dual

字符串截取

（截取的字符串，開(kāi)始的位置，長(zhǎng)度）

select substr('111222',3,2) from dual

字符串格式轉(zhuǎn)化為時(shí)間格式

select to_date('2017-08-03','yyyy-mm-dd') from dual

sql參數(shù)化占位符，不能用@用:

SELECT * FROM Table where ID=:ID

系統(tǒng)時(shí)間

getdate()改成sysdate

獲取當(dāng)前自動(dòng)增長(zhǎng)列ID

select Seq_Table.currval from dual

Seq_Table是自動(dòng)增長(zhǎng)列的名字，每個(gè)表都不一樣，所以需要找到當(dāng)前

表設(shè)置的自動(dòng)增長(zhǎng)列對(duì)應(yīng)的名字

都改完之后等程序不報(bào)錯(cuò)了運(yùn)行

會(huì)出現(xiàn)32和64位的什么破問(wèn)題網(wǎng)上各種說(shuō)法的都有說(shuō)項(xiàng)目屬性中改成 X86 X64

但是這些對(duì)我都不管用并且我覺(jué)得這些東西改了之后會(huì)對(duì)我原有的項(xiàng)目造成很多問(wèn)題

所以我研究了很久最終得出幾個(gè)結(jié)果

首先如果是控制臺(tái) 或窗體程序的話直接把項(xiàng)目中首選32位勾上就行了

如果是 asp.net 頁(yè)面程序就沒(méi)這么簡(jiǎn)單了

我本機(jī)是64位系統(tǒng) 然后我安裝oracle 和客戶端都是64位按道理不應(yīng)該給我報(bào)什么64位錯(cuò)啊

然后網(wǎng)上說(shuō)要安裝32位Instant Client Setup

然后我就下了一個(gè) 安裝了程序就可以了，

但是我在服務(wù)器上面再次用同樣的方法又不行了，找了很多資料最終重新安裝了一下iis好了（其實(shí)是要重新注冊(cè)一遍framework）

安裝32位的版本最好和oracle 版本一樣

那時(shí)候我下了很多個(gè)版本調(diào)試有的時(shí)候安裝 Instant Client Setup的時(shí)候會(huì)卡在一個(gè)點(diǎn)不動(dòng)，可以多試幾次如果還是不行在重新找一個(gè)吧！

安裝完后在控制面板里面可以找到的

另外貼出備份還原的命令用CMD打開(kāi) 運(yùn)行修改對(duì)應(yīng)參數(shù)

Exp sa/123@ORCL file=C:\OracleBack\back_%date:~0,4%%date:~5,2%%date:~8,2%.dmp owner=sa

IMP sa/123 BUFFER=64000 FILE=C:\OracleBack\back_20170821.dmp FROMUSER=SA TOUSER=SA

總結(jié)

以上就是這篇文章的全部?jī)?nèi)容了，希望本文的內(nèi)容對(duì)大家的學(xué)習(xí)或者工作能帶來(lái)一定的幫助，如果有疑問(wèn)大家可以留言交流，謝謝大家對(duì)腳本之家的支持。

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