PHP implementation only preserves the latest 1000 records in MySQL _php tutorial

Source: Internet
Author: User

PHP implementation keeps only the latest 1000 records in MySQL


This article mainly introduces the PHP implementation to keep only the latest 1000 records in MySQL method and related examples and database structure, very comprehensive, the need for small partners can refer to.

?

1

2

3

4

5

6

7

8

9

Ten

+

+

/

/

/

+

!--? php

My Sql_connect ("localhost", "root", "root");

mysql_select_db ("test");

//Keep the latest 1000 records

$limit =1000;

$query = "Select ' id ' from ' News '";

$result =mysql_query ($query);

$num =mysql_num_rows ($result);

If ($num > $limit) {

$query = ' select ' id ' from ' News ' ORDER by ' ID ' desc limit '. $limit;

$result =mysql_query ($query);

Mysql_data_seek ($result, $limit-1);

$data =mysql_fetch_array ($result);

$query = "Delete from ' news ' where ' id ' < ' $data [id] '";

If (mysql_query ($query)) {

". $num in the echo database." Record, superfluous ". ($num-$limit). " The record was successfully deleted and is now remaining ". $limit." Record! ";

}

}else{

echo "Insufficient data record". $limit. " Reviews No need to delete! ";

}

?

Test.sql

--PhpMyAdmin SQL Dump

--Version 3.1.5-rc1

--Http://www.phpmyadmin.net

--

--Host: localhost

--Date of generation: August 19, 2010 05:47

--Server version: 5.0.18

--PHP version: 5.2.8

SET sql_mode= "No_auto_value_on_zero";

/*!40101 SET @OLD_CHARACTER_SET_CLIENT =@ @CHARACTER_SET_CLIENT */;

/*!40101 SET @OLD_CHARACTER_SET_RESULTS =@ @CHARACTER_SET_RESULTS */;

/*!40101 SET @OLD_COLLATION_CONNECTION =@ @COLLATION_CONNECTION */;

/*!40101 SET NAMES UTF8 */;

--

--Database: ' Test '

--

-- --------------------------------------------------------

--

--The structure of the table ' News '

--

?

1

2

3

4

5

CREATE TABLE IF not EXISTS ' news ' (

' id ' int (one) unsigned not NULL auto_increment,

' title ' varchar (not NULL),

PRIMARY KEY (' id ')

) Engine=innodb DEFAULT charset=gb2312;

The above mentioned is the whole content of this article, I hope you can like.

http://www.bkjia.com/PHPjc/1018368.html www.bkjia.com true http://www.bkjia.com/PHPjc/1018368.html techarticle PHP Implementation only keep the latest 1000 records in MySQL This article mainly introduces the PHP implementation of only the latest 1000 records in MySQL and related examples and database structure, very comprehensive, there are ...

  • Related Article

    Contact Us

    The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

    If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

    A Free Trial That Lets You Build Big!

    Start building with 50+ products and up to 12 months usage for Elastic Compute Service

    • Sales Support

      1 on 1 presale consultation

    • After-Sales Support

      24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.