PHP分页查询解决方案

PHP分页查询
假设表的名称为A,记录条数据为未知.

各个问题最好用一条SELECT 实现

1.取出表中前10条记录.(按物理逆序又应如写)

2.取出表中的后10条记录.(按物理逆序又应如写)

3.取出表中第10条到第20条记录.(按物理逆序又应如写)

4.取出表中的所用记录,并加上两列分别是行号及物理行号.

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1、select * from a limit 0,9

2、select top(10) from a order by id desc

3、select * from a limit 9,19

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CREATE TABLE sort ('Col1' INT (3) UNSIGNED NOT NULL, 'Col2' CHAR (1) NOT NULL, PRIMARY KEY (Col1),INDEX Col2 (Col2));

INSERT INTO sort (Col1, Col2) VALUES (1, 'A');

INSERT INTO sort (Col1, Col2) VALUES (2, 'C');

INSERT INTO sort (Col1, Col2) VALUES (3, 'B');

INSERT INTO sort (Col1, Col2) VALUES (4, 'D');

INSERT INTO sort (Col1, Col2) VALUES (5, 'F');

INSERT INTO sort (Col1, Col2) VALUES (6, 'E');

INSERT INTO sort (Col1, Col2) VALUES (7, 'H');

INSERT INTO sort (Col1, Col2) VALUES (8, 'G');

INSERT INTO sort (Col1, Col2) VALUES (9, 'K');

INSERT INTO sort (Col1, Col2) VALUES (10, 'J');

INSERT INTO sort (Col1, Col2) VALUES (11, 'L')

INSERT INTO sort (Col1, Col2) VALUES (12, 'I');

INSERT INTO sort (Col1, Col2) VALUES (13, 'N');

INSERT INTO sort (Col1, Col2) VALUES (14, 'M');



SELECT * FROM Table1 Limit 0,10;

#按物理顺序取前10个



SELECT * FROM Table1 Limit 10,10;

#按物理顺序从第10开始取10个





取后几个，要先查询了总记录数

SELECT Count(*) As Count FROM Table1;

然后在自己程序里处理成如上所示的SQL



至于按物理顺序逆序取，

呵呵，

：《



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$sql = "select cardid,company,name from namecard where";

......



$sql .= " limit $offset,10";

$result2 = mysql_query($sql);

while ($row = mysql_fetch_array($result2))



{

show_card($row);

}

$pages = ceil($num/10);

echo "";

echo "(共{$pages}页)\n\n\n";

if($offset>=10) //$offset大于9，在第二页面以上就会显示前一页

{

$preoffset = $offset-10;

echo "前一页 \n";

}



for ($i=1; $i <= $pages; $i++)

{

$newoffset=10*($i-1);

echo "[$i] \n";



}

if ($pages!=0 && ($offset/10+1)<$pages)

{

echo "下一页 \n";

}

echo "";


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