如何在分页上连续获取Mysql rownum [英] How to get Mysql rownum continously over the pagenation

问题描述

基本上，我想通过使用@rownum显示表中的行数以及数据，它对第一页来说效果很好，但是当我们转到下一页时，它又从第一行开始.

Basically, i want to display the number of rows from table along with the data by using @rownum it works just fine for first page but when we go to the next page we it start with row one again.

查询代码:

$sql = "SELECT @rownum:=@rownum+1 as rownum, t.*FROM (SELECT @rownum:=0) r, (select * from tbl) t 
         LIMIT $Page_Start , $Per_Page";

分页代码:

$objConnect = mysql_connect("localhost","user","pass") or die("Error Connect to Database");
`enter code here`$objDB = mysql_select_db("WEB");
$strSQL = "SELECT * FROM line ";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$Num_Rows = mysql_num_rows($objQuery);

$Per_Page = 2; // Per Page

$Page = mysql_real_escape_string($_GET["Page"]);
if(!$_GET["Page"])
{
 $Page=1;
 }

 $Prev_Page = $Page-1;
 $Next_Page = $Page+1;

 $Page_Start = (($Per_Page*$Page)-$Per_Page);
  if($Num_Rows<=$Per_Page)
 {
 $Num_Pages =1;
 }
 else if(($Num_Rows % $Per_Page)==0)
 {
 $Num_Pages =($Num_Rows/$Per_Page) ;
 }
 else
 {
  $Num_Pages =($Num_Rows/$Per_Page)+1;
  $Num_Pages = (int)$Num_Pages;
   }

分页使用情况:

if($Prev_Page)
{
echo "<a href='$_SERVER[SCRIPT_NAME]?Page=$Prev_Page'> Back</a> &nbsp&nbsp;&nbsp; ";
}

if($Page!=$Num_Pages)
{
echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$Next_Page'>Next</a> ";
}

所以我希望行数不断增加 示例第1页的第1-5行和第2页的应为6-10之类的

So i want the number of row continuously increase page after pages example page 1 row 1-5 and page2 should be 6-10 something like that

非常感谢

推荐答案

您需要将计算结果包装起来以在子查询中获取行号，并将其限制在外部的SELECT语句中，以便row_number不会中断，例如

You need to wrap the calculation to get row number inside a subquery and limit it on the outer SELECT statement so the row_number won't break, ex,

列名和表名可能与上面的示例不同，但查询的思想是相同的.

SELECT  RowNumber, Student_ID, Student_Name
FROM
        (
            SELECT  @rownum := @rownum + 1 RowNumber,
                    t.*
            FROM    student t, (SELECT @rownum := 0) s
            ORDER   BY t.Student_ID
        ) subQ
// LIMIT    0, 3

• SQLFiddle演示(有LIMIT，但即使在分页中也可以继续)

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