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/**
 *
 */
package com.huawei.widget.util;
import java.math.BigDecimal;
/**
 * @author tanjixuan
 * @since 2008-12-20
 *
 */
public final class DatabaseUtil
{
 // oracleתÒå×Ö·û
 public static final char ORACLE_ESCAPE_CHAR = '\\';
 // oracleÌØÊâ×Ö·û¶¨Ò壬ÓÃÓÚתÒå¡£ÒÔ“|”×Ö·û·Ö¸î
 public static final String ORACLE_SPACIAL_CHAR = "|%|_|" + ORACLE_ESCAPE_CHAR + "|";
 // ²»ÔÊÐíʵÀý»¯
 private DatabaseUtil()
 {
 }
 static public String toEscape(String data)
 {
  if (null == data || "".equals(data.trim()))
  {
   return data;
  }
  int len = data.length();
  StringBuilder escapeStrBuild = new StringBuilder();
  char singleChar;
  for (int index = 0; index < len; index++)
  {
   singleChar = data.charAt(index);
   if (ORACLE_SPACIAL_CHAR.indexOf(singleChar) > -1)
   {
    escapeStrBuild.append(ORACLE_ESCAPE_CHAR).append(singleChar);
   }
   else
   {
    escapeStrBuild.append(singleChar);
   }
  }
  // ´¦ÀíoracleµÄ×Ö·û´®ÌØÊâ×Ö·ûÁË¡£
  String escapeStr = escapeStrBuild.toString().replace("'", "''");
  return escapeStr;
 }
 
 static public String toOracleString(String data)
 {
  if (null == data || "".equals(data.trim()))
  {
   return data;
  }
  // ´¦ÀíoracleµÄ×Ö·û´®ÌØÊâ×Ö·ûÁË¡£
  String escapeStr = data.replace("'", "''");
  return escapeStr;
 }
 
 static public Long toLong(BigDecimal data)
 {
  Long resultLong = 0L;
  if (null != data)
  {
   resultLong = data.longValue();
 &


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select trunc(sysdate ,'yyyy') from dual   --±¾Äê¶ÈµÚÒ»Ìì
              
select trunc(sysdate ,'mm') from dual     --±¾ÔµÚÒ»Ìì
           &nbs ......

oracle nvl decode

SELECT
DECODE(ÁÐ,0,'Q'1,'P',2,'O')¡¡AS ret
from dual
--·ÖÎö: µ± ÁÐ=0ʱ,½«"Q"¸³Öµ
--µ± ÁÐ =1ʱ,½«"P"¸³Öµ
--µ± ÁÐ=2ʱ,½«"O"¸³Öµ
--NVL()º¯Êý:
--NVL(ARG,VALUE)´ï±êÈç¹ûÇ°ÃæµÄARGֵΪNULLÄÇô·µ»ØµÄֵΪºóÃæµÄVALUE¶þÕß½áºÏʹÓÃ:
DECODE(NVL(±äÁ¿ ''),'','-','OK')
//·ÖÎö:
--Èô ±äÁ¿ ÊÇ·ñΪ¿Õ.ÈôΪ¿Õ¸³¸ø¿ ......

ORACLE SGAÖ®Êý¾Ý»º³åÇø£¨Data Buffer£©

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jspÁ¬½Óoracle£¨javabean£©


package DBbean;
import java.sql.*;
public class ConnBean
{
private Connection con;
//³õʼ»¯Á¬½Ó¡£
public ConnBean()
{
        
  try
  {
   Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
   ......
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