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linq to sql ·ÖÒ³ µÄ¼¸ÖÖ·½·¨

1.Êý¾ÝµÄ·Ö²¼Skip()ºÍtake()
Skip(100)´ú±íÌø¹ý100Ðкó.´ÓµÚ101ÐпªÊ¼·ÖÒ³;
take(10)±íʾ¶àÉÙÐзÖÒ³;
Àý:
var result=from pdt in db.Product
                 select pdt;
this.dataview.DataSource=result.Skip(10).take(10);
this dataview.DataBind();
×¢:ÕâÖÖ·½Ê½Ò»´ÎÐÔ²éѯ³öÀ´ËùÓÐÊý¾Ý,È»ºóÔÙ·ÖÒ³;
2.ÏÂÃæµÄ·½Ê½ÊÇÿ¸öÌύʱ°ó¶¨µÄ¶¼ÊÇÌØ¶¨µÄÊý¾Ý,¶ø·ÇËùÓÐÊý¾Ý;
public overridevoid DataBind()
{
     db.log=this.response.output;
          var result=from pdt in db.product
                             select pdt;
          int skipNumber=Int.parse(this.textbox1.text)*10;
           this.dataview.DataSource=result.Skip(skipNumber).take(10);
           this dataview.DataBind();
}
protected void NextButton_Click(Object sender,EventArgs e)
{
this textbox1.text=(int.parse(this.textbox1.text)+1).ToString);
this.DataBind();
}
protected void form_Load(Object send,EventArgs e)
{
        if (!this.IsPostBack)
         {
                   this.DataBind();
       }
}
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int RecordCount = 0;
int PageCount = 1;
DataClassesDataContext data = new DataClassesDataContext();
int SkipIndex = 0;
private string _PageString = "";
public string PageString
{
get {
return _PageString;
}
set {
_PageString = value;
}
}
protected void Page_Load(object sender, EventArgs e)
{
RecordCount = data.Orders.Coun


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¡¡¡¡Binary[(n)] ÊÇ n λ¹Ì¶¨µÄ¶þ½øÖÆÊý¾Ý¡£ÆäÖУ¬n µÄȡֵ·¶Î§ÊÇ´Ó 1 µ½ 8000¡£Æä´æ´¢ñ¿µÄ´óСÊÇ n + 4 ¸ö×Ö½Ú¡£
¡¡¡¡Varbinary[(n)] ÊÇ n λ±ä³¤¶ÈµÄ¶þ½øÖÆÊ ......

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from: http://blog.163.com/ck275601774/blog/static/1230468012009631113559291/
--ÈÕÆÚת»»²ÎÊý
select CONVERT(varchar,getdate(),120)
--2009-03-15 15:10:02
select replace(replace(replace(CONVERT(varchar, getdate(), 120 ),'-',''),' ',''),':','')
--20090315151201
select CONVERT(varchar(12) , getdate ......

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1.˵Ã÷£º¸´ÖƱí(Ö»¸´Öƽṹ,Ô´±íÃû£ºa бíÃû£ºb)
SQL: select * into b from a where 11
2.˵Ã÷£º¿½±´±í(¿½±´Êý¾Ý,Ô´±íÃû£ºa Ä¿±ê±íÃû£ºb)
SQL: insert into b(a, b, c) select d,e,f from a;
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SQL: select a.title,a.username,b.adddate from table a,(select max(adddat ......

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select   getdate()   //2003-11-07   17:21:08.597    
  select   convert(varchar(10),   getdate(),120)   //2003-11-07  
  select   convert(char(8),getdate(),112)  ......

sql Óï¾ä

select * from pet;
insert into pet values('Liujingwei','Liuchao','cat','f','1984-04-18',null);
UPDATE pet set birth='1989-08-31' WHERE name='Slim';
select * from pet WHERE birth>'1998-1-1';
SELECT * from pet WHEREselect * from pet;
insert into pet values('Liujingwei','Liuchao','cat','f','198 ......
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