engine innodb

To build next-generation Web applications and services, MySQL5.6 has improved the core functional areas of the database, including: improves the performance and scalability of the InnoDB engine, improves the query execution time of the optimizer,

Case study: Some program execution MYSQL statement error messages are displayed in the exception log of A webgame we are operating. "Deadlockfoundwhentryingtogetlock; tryrestartingtransaction" is commonly used, and "Errornumber: 1205:

How to Use pt-online-schema-change to change the primary key of a MySQL table, ptonlinechangeschema When the service runs for a period of time and finds that the original primary key settings are not reasonable, you want to change the primary key.

Text and varchar character indexes are invalid when innodb in mysql is a uft8 character set. The index length of a single field is limited to 767 bytes due to the index length limit in the innodb utf8 character set. The maximum index length is: The

MySQL foreign key constraint cascading deletion when updating a database, the first table is used to store some simple blog data, and the second table is used to store comments related to these blogs. This example cleverly defines a foreign key

The MySQL table type and storage engine version are inconsistent. The old version of mysql client Navicate 8 is used, and the mysql server uses the version of mysql5.6. The version is incorrect when the engine version is modified; Mysql error 'Type =

DBA reported a bug. An online DDL statement causes the master and slave to stop. The problem is described as follows. Description: The procedure is as follows: 1. Createtabletb (cvarchar (1000) engineinnodb; 2.3.Createtabletcasselectcast

MySQL two table storage structures: MyISAM and InnoDB performance comparison test, myisaminnodb Reproduced http://www.jb51.net/article/5620.htm  MySQL supports two main table storage formats: MyISAM and InnoDB. InnoDB was used for a project last

Mysql auto-incrementing column leads to duplicate primary key issue analysis..., mysql primary key A few days ago, the development of shoes reported a problem of using the load data infile command to import data primary key conflicts. After analysis,

How to use php to implement unlimited classification is a design technique that is frequently used in development. This article mainly introduces the implementation method of PHP to implement unlimited classification. if you need it, please take a

MySQL sequence solution bitsCN.com Differences between MySQL auto-growth and Oracle sequence:Auto-increment can only be used for one field in the tableAuto-growth can only be assigned to a fixed field of a fixed table, and cannot be shared by

: This article mainly introduces php to read txt files and insert data into the database. For more information about PHP tutorials, see. To test a function today, you need to insert some raw data into the database. PM gave a txt file. how to quickly

This article mainly introduces the methods and sample code for php to read txt files and insert data into the database. for small files, you can refer to the first method. for large files, see the second method. To test a function today, you need to

Today testing a function, you need to insert some raw data into the database, PM to a txt file, how to quickly split the content of the TXT file into the desired array, and then inserted into the database? Sample content for

In this article, we will learn how to use a basic abstract class in PHP 5 to update data in two InnoDB tables using foreign key constraints. The following example shows how to use the foreign key constraint in the script language on the server. I.

MySQL does not provide direct variables for deadlock. For Versions later than Version 5.5, performance_shcema can provide detailed information about the lock (but we are still 5.0). For Innodb_lock_monitor, the output of innodb_monitor is always

In the official Spring Security documents, only the security ACL hsql script is provided. However, spring does not explicitly provide the database creation script and configuration instructions when using the MySQL database, the following are the

When parsing DEDECMS today, we found that deder's MYSQL time fields are all used 'Senddata' int (10) unsigned not null default '0 '; Later, I found this article on the Internet. It seems that if the time field is involved in the

JavaWeb: deploy the SSH project on Sinaapp and bind the Domain Name1. Create a new application in SAEWhen creating an application, we need to enter a second-level domain name, such as XXXXXX. In the "development language" column, select Java and

MySQL Vertical Split (Reading Notes)1. Vertical Split Compared with horizontal split, vertical split is easier to implement. Vertical Split means to split different business data in the database into different databases. Vertical splitting can