A brief discussion on mysql core architecture design

1. $row = mysql_fetch_row($result); Returns a regular array $row, $row[0] is the first element, $row[1] is the second element, and so on... mysql_num_fields ($result) Returns the number of elements in the result. 2. $row = mysql_fetch_array($result); returns an array $row. The example is as follows: The table structure is as follows: username | password ----------------------- -------------- bourbon | abc berber | efg The first time you run $row = mysql_fetch_array($result), the results are as follows: $row[0] = $row["username"] = "bourbon" $row[1] = $row["

1. Recommended 10 articles about num

Introduction: 1. $row = mysql_fetch_row($result); Returns a regular array $row, $row[0] is the first element, $row[ 1] is the second element, and so on... mysql_num_fields($result) returns the number of elements in the result. 2. $row = mysql_fetch_array($result); returns an array $row. For example: The table structure is as follows: username | pas...

##2. How to use Queries? Summary of Queries instance usage

##Introduction: This article mainly introduces the MySQL log settings and viewing methods. Friends in need can refer to the following MySQL logs: Error log: -log-err Query log: -log Slow query logs: -log-slow-queries Update logs: -log-update Binary logs: -log-bin By default, all logs are created in the mysqld data directory. You can force mysqld to close and reopen by flushing the logs. Log files (or in some cases switch to a new day...

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## Introduction: Test server configuration: Dell R730; 24 cores; 64G memory; Centos version: 6.4; MySQL version: Community 5.6. 12; Test database size: 24G. Sysbench parameters: 64 threads and 10 tables, each table is pre-initialized with 10 million data, read and write mixed OLTP mode. Running on the same machine as mysql. Test duration: 5 minutes/scenario.  The plug-in OLTP is not installed test statis...

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10 recommended articles about the constant() function

Introduction: githttps://github.com/sea-boat/mysql-protocol overview server status identification. More details: https://dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol.constant;/** *...

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__proto__ Related usage example code summary

Introduction: githttps://github.com/sea-boat/mysql-protocol overview server status identification. More details: https://dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol.constant;/** *...

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10 recommended articles about the mysql_unbuffered_query() function

Introduction: May I ask $lh = mysql_connect('localhost', 'root', 'root' ); $qry = "SELECT * FROM aaa LIMIT 10"; $rh = mysql_unbuffered_query($qry, $lh ); $thread = mysql_thread_id ( $lh ); while ( $res = mysql_fetch_row( $rh )&nb

##7. Mysql_stat's 10 recommended content

Introduction: This article summarizes the solutions to MYSQL is marked as crashed and should be repaired. Friends in need can refer to it.        Problem Analysis The cause of the error. Some netizens said that it was an index error caused by frequent querying and updating of the [Data Table] table. Because my page was not statically generated, but a dynamic page, I quite agree with this. statement. There is also a saying that it is a MYSQL database because of some...

8. Recommended articles about mysql returning the current thread

#Introduction: 1. The program counter is the line number indicator of the bytecode executed by the current thread. 2. The Java virtual machine stack thread is private and has the same life cycle as the thread. Used to store information such as local variable tables, operand stacks, dynamic linked lists, method exits, etc. Local variable table storage content: basic data types (boolean, byte, char, short, int, float, long, double) object reference (different from symbol reference, symbol reference is stored in the constant pool) returnAddress type (points to a bytecode instruction Address) 64...

9. 10 recommended articles about the mysql_stat() function

Introduction: This article summarizes the solutions to MYSQL is marked as crashed and should be repaired. Friends in need can refer to it. Problem analysis: The cause of the error was analyzed. Some netizens said that it was an index error caused by frequent querying and updating of the [data table] table. Because my page was not statically generated, but a dynamic page, I quite agree with this statement. It is also said that the MYSQL database has been damaged for some reason, such as: sudden power outage of the database server,...

10. About Recommended articles about mysql_select_db() function

##Introduction: How to operate MySQL database with PHP - how to select database files In our daily PHP development work, when we want to obtain data from the database, after PHP connects to the database, the next step is to select the database file, and we need to use a function, the mysql_select_db() function to select the database! Before choosing a database, the first thing we do is connect PHP to the database. This is what we discussed in the previous article "Using the mysql_connect() function to connect to the database (How PHP operates the MySQL database...

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