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Ajax ²Ù×÷XMLµÄºÃʵÀý

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<data>
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   <pet>¹·</pet>
   <pet>Óã</pet>
  </pets>
</data>
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Ajax ²Ù×÷XMLµÄºÃʵÀý

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<?xml version="1.0" encoding="UTF-8"?>
<data>
  <pets>
   <pet>è</pet>
   <pet>¹·</pet>
   <pet>Óã</pet>
  </pets>
</data>
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ajax json,xml,Îı¾Êý¾Ý´«µÝʵÀý

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<head> <title>²âÊÔajax</title> <meta http-equiv=”Content-Type” content=”text/html;charset=utf-8″ />
<script type=”text/javascript”>
var xmlHttp=null;
function creatXMLhttp()
{
        if(window.ActiveXObject)
        {
                  xmlHttp=new ActiveXObject(”Microsoft.XMLhttp”);
         }
       else
         {
                   xmlHttp=new XMLHttpRequest();
  ......

ajax json,xml,Îı¾Êý¾Ý´«µÝʵÀý

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<head> <title>²âÊÔajax</title> <meta http-equiv=”Content-Type” content=”text/html;charset=utf-8″ />
<script type=”text/javascript”>
var xmlHttp=null;
function creatXMLhttp()
{
        if(window.ActiveXObject)
        {
                  xmlHttp=new ActiveXObject(”Microsoft.XMLhttp”);
         }
       else
         {
                   xmlHttp=new XMLHttpRequest();
  ......

Ajax±íµ¥Ìá½»ÂÒÂë

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   //Òª´«µÝµÄ²ÎÊý
   var queryString = "firstName=" + firstName + "&lastName=" + lastName
                          + "&birthday=" + birthday;    function 
//GET·½Ê½Ìá½»   
doRequestUsingGET() {   
         createXMLHttpRequest();   
        var url = "GetAndPostExample?" + queryString + "&timeStamp="  
                           + new Date().getTime();   
         xmlHttp.onreadystatechange = handleStateChange;   
   &nbs ......

MSSQLµÄ¶à²ãǶÌײéѯ

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select * from ( select top(10)  * from ( select top(100)  * from (select  [chatcontent].[senderid],[chatcontent].[id] ,[chatcontent].[toid] ,[chatcontent].[sendtime] ,[chatcontent].[sendcontent]  from [chatcontent] where [chatcontent].[id] not in (select [messageid] from [messagereaded] where [messagereaded].[toid]='123') ) as tb2) as tb3) as tb4 ......

»ùÓÚmssql °ÙÍò¼¶ Êý¾Ý ²éѯ ÓÅ»¯ ¼¼ÇÉÈýÊ®Ôò

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select id from t where num is null
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select id from t where num=0
3.Ó¦¾¡Á¿±ÜÃâÔÚ where ×Ó¾äÖÐʹÓÃ!=»ò<>²Ù×÷·û£¬·ñÔò½«ÒýÇæ·ÅÆúʹÓÃË÷Òý¶ø½øÐÐÈ«±íɨÃè¡£
4.Ó¦¾¡Á¿±ÜÃâÔÚ where ×Ó¾äÖÐʹÓà or À´Á¬½ÓÌõ¼þ£¬·ñÔò½«µ¼ÖÂÒýÇæ·ÅÆúʹÓÃË÷Òý¶ø½øÐÐÈ«±íɨÃ裬È磺
select id from t where num=10 or num=20
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select id from t where num=10
union all
select id from t where num=20
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select id from t where num in(1,2,3)
¶ÔÓÚÁ¬ÐøµÄÊýÖµ£¬ÄÜÓà between ¾Í²»ÒªÓà in ÁË£º
select id from t where num between 1 and 3
6.ÏÂÃæµÄ²éѯҲ½«µ¼ÖÂÈ«±íɨÃ裺
select id from t where name like '%abc%'
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7.Èç¹ûÔÚ where ×Ó¾äÖÐʹÓòÎÊý£¬Ò²»áµ¼ÖÂÈ«±íɨÃè¡£ÒòΪSQLÖ»ÓÐÔÚÔËÐÐʱ²Å»á½âÎ ......

html¶ÁÊé±Ê¼Ç

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