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This article mainly introduces a simple and practical php database class for mysql operations. it not only contains common php operations for mysql databases, but also contains the filtering function for dangerous characters, it is very practical.

Batch processing is a non-interactive way to run MySQL programs. like the commands you use in MySQL, you will still use these commands. To implement batch processing, you need to redirect a file to the MySQL program. First, we need a text file

Backup is the simplest way to protect data. This section describes multiple backup methods. To get a consistent backup, make a lock tables lock on the relevant table. You only need one read LOCK. When you copy a file in the database directory, this

D1_d is sent to Forum section -------------------------------------------------------Section No0 dedecmsD8888D post title -------------------------------------------------------Which of the following three solutions is the fastest?D8888D main post

The application of Sphinx Chinese word segmentation in discuz.Sphinx-for-chinese is a full-text retrieval software focused on Chinese search, adding Chinese processing modules and optimizing Chinese search results on the basis of Sphinx. In

# Source definition sourcesrc1 {sources, MAX (id) FROMdo # Source src1 {type = mysql SQL _host = localhost SQL _user = root SQL _pass = password SQL _db = test SQL _sock =/usr/local/mysql. sock SQL _query_pre = set names utf8 SQL _query_pre =

Using triggers to realize the materialized view on the e-commerce platform, we sometimes need to perform some aggregate calculations on user orders, such as the total number of orders, the total amount, and the average price, there are several ways

Create two test tables and create the unique constraint on the id column.Mysql> create table test1 (id int, name varchar (5), type int, primary key (id ));Query OK, 0 rows affected (0.01 sec)Mysql> create table test2 (id int, name varchar (5), type

This article gives a detailed analysis of the differences between ReplaceINTO and INSERTINTO in SQL statements. If you need a friend, the operation of REPLACE is similar to that of INSERT. There is only one exception. If an old record in the table

MySQL processes repeated methods. Sometimes a table or result set contains duplicate records. Sometimes it is allowed, but sometimes it needs to stop repeated records. Sometimes it needs to identify duplicate records to be deleted from the table.

MYSQL insert several methods for processing duplicate key values, mysql several methods     When a unique column inserts records containing duplicate values on a UNIQUE key, the default insert error 1062 is returned. MYSQL has three different

Today, the author of a plug-in DST asked me about the difference between ReplaceINTO and INSERTINTO. I told him to visit my blog at night. At that time, I was still busy. Now I found something in the MYSQL manual, in the MYSQL manual, REPLACEINTO is

Materialized view using triggers bitsCN.com Using triggers to realize the Materialized view on the e-commerce platform, we sometimes need to perform some aggregate calculations on user orders, such as the total number of orders, the total amount,

How to deal with mysql problems bitsCN.com How to deal with mysql problems Record and solve the problem of using mysql at work. 1 pipe broken or connection broken The connection to the mysql client using pol is inexplicably disconnected, which

This article mainly introduces some methods to process various duplicates in MySQL, including repeated processing of tables and query results, for more information, see tables or result sets that contain duplicate records. Sometimes it is allowed,

MySQL Tutorial: ReplaceINTO indicates that REPLACE runs like INSERT. Except for one, if an old record in the table has the same value as a new record used for the primary key or a UNIQUE index, the old record is deleted before the new record is

Batch processing is a non-interactive way to run mysql programs. like the commands you use in mysql, you will still use these commands. To implement batch processing, you need to redirect a file to the mysql program. First, we need a text file

Mysql data import method mysqlimport bitsCN.com Mysql data import method mysqlimport 1). mysqlimport syntax introduction: Mysqlimport is located in the mysql/bin directory and is a very effective tool for mysql to load (or import) data. This is a

I have several databases for sphinx query. each database uses sphinx to create different indexes. But the query goes wrong. For example, I want to query the required content from database. How can I specify the index of the database to be queried?

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