Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

C# »ñÈ¡ SQL·þÎñÆ÷Áбí

#region   µÃµ½ËùÓб¾µØÍøÂçÖпÉʹÓõÄSQL·þÎñÆ÷ÁÐ±í  
  ///   <summary>  
  ///   µÃµ½ËùÓб¾µØÍøÂçÖпÉʹÓõÄSQL·þÎñÆ÷ÁÐ±í  
  ///   </summary>  
  ///   <param   name="p_strServerList">·þÎñÆ÷Áбí</param>  
  ///   <returns></returns>  
  public   static   bool   GetServers(ref   string   []   p_strServerList)  
  {  
  try  
  {  
  SQLDMO.Application   sqlApp   =   new   SQLDMO.ApplicationClass();    
  SQLDMO.NameList   sqlServers   =   sqlApp.ListAvailableSQLServers();    
  if(sqlServers.Count   >   0)  
  {  
  p_strServerList   =   new   string[sqlServers.Count];  
  for(int   i=0;i<sqlServers.Count;i++)    
  {    
  string   srv   =   sqlServers.Item(i   +   1);    
  if(srv   !=   null)    
  {    
  p_strServerList[i]   =   srv;                                                    
  }    
  }    
  }  
  return   true;  
  }  
  catch(Exception   ex)  
  {  
  throw   ex;  
  }  
  }  
   
  #endregion  
   
  #region   µÃµ½Ö¸¶¨SQL·þÎñÆ÷ËùÓÐÊý¾Ý¿âµÄÁÐ±í  
  ///   <summary>  
  ///   µÃµ½Ö¸¶¨SQL·þÎñÆ÷ËùÓÐÊý¾Ý¿âµÄÁÐ±í  
  ///   </summary>  
  ///   <param   name="p_strDataBas


Ïà¹ØÎĵµ£º

º½¿Õ¹«Ë¾¹ÜÀíϵͳ(VC++ ÓëSQL 2005)

ϵͳ»·¾³£ºWindows 7
Èí¼þ»·¾³£ºVisual C++ 2008 SP1 +SQL Server 2005
±¾´ÎÄ¿µÄ£º±àдһ¸öº½¿Õ¹ÜÀíϵͳ
      ÕâÊÇÊý¾Ý¿â¿Î³ÌÉè¼ÆµÄ³É¹û£¬ËäÈ»³É¼¨²»¼Ñ£¬µ«ÊÇ×÷ΪÎÒÓÃVC++ ÒÔÀ´±àдµÄ×î´ó³ÌÐò»¹ÊÇ´«µ½ÍøÉÏ£¬ÒÔ¹©²Î¿¼¡£ÓÃVC++ ×öÊý¾Ý¿âÉè¼Æ²¢²»ÈÝÒ×£¬µ«Ò²²»ÊDz»¿ÉÄÜ¡£ÒÔÏÂÊÇÎҵijÌÐò½çÃæ£¬ºóÃæ ......

SQL CONCATENATEµÄÓ÷¨

ÓеÄʱºò£¬ÎÒÃÇÓÐÐèÒª½«Óɲ»Í¬À¸Î»»ñµÃµÄ×ÊÁÏ´®Á¬ÔÚÒ»Æð¡£Ã¿Ò»ÖÖ×ÊÁϿⶼÓÐÌṩ·½·¨À´´ïµ½Õâ¸öÄ¿µÄ£º
MySQL: CONCAT()
Oracle: CONCAT(), ||
SQL Server: +
CONCAT() µÄÓï·¨ÈçÏ£º
CONCAT(×Ö´®1, ×Ö´®2, ×Ö´®3, ...): ½«×Ö´®1¡¢×Ö´®2¡¢×Ö´®3£¬µÈ×Ö´®Á¬ÔÚÒ»Æð¡£Çë×¢Ò⣬OracleµÄCONCAT()Ö»ÔÊÐíÁ½¸ö²ÎÊý£»»»ÑÔÖ®£¬Ò ......

SQL¾ä·¨µÄÓ¦ÓÃ

ÔÚÕâÒ»Ò³ÖУ¬ÎÒÃÇÁгöËùÓÐÔÚÕâ¸öÍøÕ¾ÓÐÁгö SQL Ö¸ÁîµÄÓï·¨¡£ÈôÒª¸üÏ꾡µÄ˵Ã÷£¬ÇëµãѡָÁîÃû³Æ¡£
ÕâÒ»Ò³µÄÄ¿µÄÊÇÌṩһ¸ö¼ò½àµÄ SQL Óï·¨×öΪ¶ÁÕ߲ο¼Ö®Óá£ÎÒÃǽ¨ÒéÄúÏÖÔھͰ´ Control-D ½«±¾Ò³¼ÓÈëÄúµÄ¡ºÎÒµÄ×î°®¡»¡£
Select
SELECT "À¸Î»" from "±í¸ñÃû"
Distinct
SELECT DISTINCT "À¸Î»"
from "±í¸ñÃû"
......

asp.net·Àsql×¢Èë

 using (con)
        {
            con.Open();
            String sqltext = "select * from emp where empno=@empno";
      ......

sqlÖÐCASEµÄÓ÷¨

 
À´Ô´:SQL°ïÖúÎĵµ
CASE
¼ÆËãÌõ¼þÁÐ±í²¢·µ»Ø¶à¸ö¿ÉÄܽá¹û±í´ïʽ֮һ¡£
CASE ¾ßÓÐÁ½ÖÖ¸ñʽ£º
¼òµ¥ CASE º¯Êý½«Ä³¸ö±í´ïʽÓëÒ»×é¼òµ¥±í´ïʽ½øÐбȽÏÒÔÈ·¶¨½á¹û¡£
CASE ËÑË÷º¯Êý¼ÆËãÒ»×é²¼¶û±í´ïʽÒÔÈ·¶¨½á¹û¡£
Á½ÖÖ¸ñʽ¶¼Ö§³Ö¿ÉÑ¡µÄ ELSE ²ÎÊý¡£
Óï·¨
¼òµ¥ CASE º¯Êý£º
CASE input_expression
 &n ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ