MySQL

Often some perfectionists ask me, how to let the database's self-increment field in the record is deleted when the order to reset them, not to discuss whether such a toss is really necessary, just talk about the solution, there is a need for friends

Mysql> set profiling=1;Query OK, 0 rows Affected (0.00 sec)Mysql> ALTER TABLE test modify name varchar (10);Query OK, 3 Rows Affected (0.00 sec)Records:3 duplicates:0 warnings:0 Mysql> show Profiles; +----------+------------+------------------------

After MySQL installation is successful, you can see that there are already several databases of MySQL, INFORMATION_SCHEMA and test, the INFORMATION_SCHEMA library has a table named columns, which records field information for all tables in the

 MySQLstored procedure error debug recordThe company platform runs on MySQL database, some stored procedures error, debugging process pain, record errors and solutions, for reference. Debug Environment:dbforge Studio for MySQL 6.1 version, trial

Experimental topology:650) this.width=650; "title=" _lhsj@]l4or23wypq3umqr8.jpg "alt=" wkiol1qpjxgriv_haaenpjuaxqs227.jpg "src="/HTTP/ S3.51cto.com/wyfs02/m01/49/1d/wkiol1qpjxgriv_haaenpjuaxqs227.jpg "/>Experimental purpose: The use of NFS to

Four steps for MySQL password setup in xampp (assuming you want to set a password of 123456)1, enter Http://localhost/phpmyadmin enter phpMyAdmin page Click Mysql->user in the host for the Host,user as the root of the column enter 1234562, go back

In the first section of this chapter we also mentioned the performance bottleneck of using the query Profiler to locate a query, and here we describe in detail the purpose of Profiling and how to use it. To optimize a query, we need to know exactly

In response to the company's needs, to create a more secure MySQL cluster, to achieve MySQL failover after the switch, the study of a few days finally have the results, share.First, introduce the function of this cluster scheme.1, MySQL server after

MySQL can be custom sorted by field () function, Format:field (VALUE,STR1,STR2,STR3,STR4),value and str1, str2,str3,str4 Compare, return 1,2,3,4, if encountered null or the data that is not in the list returns 0. Mysql> SELECT * from

CentOS source code Compilation install MySQL 5.5.15 article directory[Hide] Installing the Build Tool Download source code Installing CMake and Bison Compile and install MySQL Some related settings Installing the Build

Python operation MySQL requires installation of Python-mysqlCan be searched from the Internet, and the same as the normal Python package installationAfter installation, the module name is MYSQLDB, can be used in Windows and Linux environment, the

A problem with a sudden increase in database connectivity to 1000Viewed, there are no lock action statements. However, there are obviously many SQL statements from copy to TMP table, which reads longer, and the table is read-locked, and the UPDATE

Enter MySQLServerAs follows:Enter Password: ******Welcome to the MySQL Monitor. Commands End With; or \g.Your MySQL Connection ID is 810Server version:5.6.10 MySQL Community Server (GPL)Copyright (c) and/or, Oracle, its affiliates. All rights

$sql = "SELECT * FROM table_name where field_name like '% $var% '";$result =mysql_query ($sql) or die;MySQL provides standard SQL pattern matching and an extended regular expression based on Unix-like utilities such as VI, grep, and

In MySQL, use the RegExp keyword to match the query regular expression, which has the following basic form:Field name REGEXP ' Match method 'Pattern character meaning Use example ^ Match start SELECT ' books ' from ' Tb_name ' WHERE ' books '

because the new and old Project database version gap is too large, the encoding format is different, the engine is different, so had to install two databases. This time installs two MySQL database, the version is 4.0.18,5.5.36 respectively.

1. Implementation:$ brew Install MySQL2. /usr/local/etc/ under Create or modify mysql.conf, example:[Client]port = 3306socket =/tmp/mysql.sockdefault-character-set = Utf8[mysqld]collation-server = Utf8_unicode_ Cicharacter-set-server =

Nodejs connect to the MySQL database, first create a database and a table. As follows:create databases node;CREATE TABLE test (id int auto_increment PRIMARY KEY, name char ()) Engine=innodb DEFAULT Charset=utf8;To install the MySQL driver:MysqlHere

SQL statements in which the String type in the Mysql database is sorted by numbers and by TimeWhen I was working on a project today, I encountered a small problem. When I was querying in the database, I had to sort it with a String ID! (Note: The ID

Partialdoublewrite and doublewrite Mysql double write (secondary write) is an important feature of the mysql innodb Storage engine. I have read the relevant materials over the past two days and combined my existing knowledge, let's talk about your