show table status

Due to frequent data updates and fast data volume growth, the machine disk cannot keep up with the pace. The database shard and migration history database are used. Data Optimization now, Due to frequent data updates and fast data volume growth, the

Generally, a database is a collection of data. Specifically, a database on a computer can be a collection of files in the memory or a collection of memory data. MySql Databases and sqlserver databases are actually database management systems that

Detailed description of the use of the ALTER command in MySQL, mysqlalter MySQL's ALTER command is very useful when you want to change the table name, table fields, or if you want to add or delete columns in an existing table. Let's start to create

Xin Xing talks about data fragmentation in mysql and operations under MyISAM Engine Data fragmentation in mysql is closely related to data deletion. When deleting data, it will inevitably lead to discontinuous blank space in the data file. for

MysqlshowtablestatuslikemytableG; ***************************** 1. row ************************** Name: mytable table Name Engine: innoDB Storage engine InnoDBVersion: 10mysql Row_format: Compact row format. Formats include Dynamic, fixed, and

Basic Mysql partition management operations: I haven't written a blog for a long time. I have been learning Mysql partition for the past two days. Summary: Mysql supports Horizontal partitioning and does not support Vertical partitioning; Horizontal

This article mainly introduces a specific case analysis of optimizing MySQL Query operations. it mainly adjusts the use of join fields. For more information, see Problem Description A user reports that the execution time of an SQL statement is too

As we all know, the MySQLInnoDB storage engine is very similar to Oracle and supports transactions and row-locking. After actual tests, a big difference between innodb and oracle is: As we all know, the MySQL InnoDB Storage engine is very similar to

MySQL is a relational database (RelationalDatabaseManagementSystem ). This article focuses on the alert commands of the mysql Database. This article is very detailed and has reference value. if you are interested, join us and learn that MySQL is a

1. clone a table You can use Create Table... like statement to clone the table structure; Use insert into... select Statement to clone part or all of the table data.  2. Temporary table Need a table created for temporary use only and automatically

Mysql Study Notes 4 (view), mysql Study Notes ViewView Operations on views can simplify queries and improve security. View: Essentially, a virtual table is similar to a real table and contains a series of columns and row data with names.

As we all know, the MySQL InnoDB Storage engine is very similar to Oracle and supports transactions and row-locking. After actual tests, a big difference between innodb and oracle is: the same data, the length of innodb single-row storage is

MySQL database ALTER command explanation, MySQL ALTER command explanation MySQL is a Relational Database Management System. This so-called "Relational" can be understood as "tables". A Relational Database consists of one or more tables. When we need

Implementation principle of mysqldump and implementation principle of mysqldump MySQL backup can be divided into the following two types: 1. Cold backup 2. Hot Standby Among them, cold backup, as its name implies, is to turn off the database and use

Problem description One user reflects the first line one SQL statement execution time is too slow to accept. The SQL statement looks simple (the table name and field name are modified in the description):SELECT Count (*) from a JOIN b in a. ' s ' =

When you use MySQL (show tables), you sometimes need to see information about tables and fields (whether the table and a field exist, etc.) ~ ~ and PHP provides such related functions as: Mysql_list_dbs (), Mysql_list_fields (), But the

MySQL's alter command is very useful when you want to change the name of the table, the field of the table, or if you want to add or delete columns from an existing table. Let's start by creating a use case with a table named Testalter_tbl:

InnoDB storage engine As with most databases, records are stored as rows. This means that the page holds data for a row of rows in the table. Before the InnoDB 1.0.x version, the InnoDB storage engineThe compact and redundant two formats are

As we all know, MySQL InnoDB storage engine is very similar to Oracle, support transactions, row-locking, after the actual test, InnoDB and Oracle a relatively large difference point, in this test case, the same data, The InnoDB single-line storage

MySQL provides the following three ways to get metadata for database objects: 1) Show statement 2 query related tables from INFORMATION_SCHEMA database 3 command line program, such as Mysqlshow, mysqldump Get Meta data with show statement MySQL