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Rechercher dans le manuel MySQL
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https://dev.mysql.com/partitions-table.html
AVG_ROW_LENGTH The average length of the rows stored in this partition or subpartition, in bytes. Each row in this table corresponds to an individual partition or subpartition of a partitioned table. The PARTITIONS table has these columns: ...
https://dev.mysql.com/server-system-variables.html
The MySQL server maintains many system variables that configure its operation. System variables can be set at server startup using options on the command line or in an option file. Most of them can be changed dynamically at runtime using the SET ...
https://dev.mysql.com/keywords.html
Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as table and column names. This may also be true for the names of built-in functions. Reserved words are permitted as ...
https://dev.mysql.com/information-schema-optimization.html
Some INFORMATION_SCHEMA tables contain columns that provide table statistics: STATISTICS.CARDINALITY TABLES.AUTO_INCREMENT TABLES.AVG_ROW_LENGTH TABLES.CHECKSUM TABLES.CHECK_TIME TABLES.CREATE_TIME TABLES.DATA_FREE TABLES.DATA_LENGTH ...
https://dev.mysql.com/merge-storage-engine.html
The MERGE storage engine, also known as the MRG_MyISAM engine, is a collection of identical MyISAM tables that can be used as one. “Identical” means that all tables have identical column data types and index information. You cannot merge MyISAM ...
https://dev.mysql.com/using-innodb-tables.html
row *************************** Name: t1 Engine: InnoDB Version: 10 Row_format: Compact Rows: 0 Avg_row_length: 0 Data_length: 16384 Max_data_length: 0 Index_length: 0 Data_free: 0 Auto_increment: NULL Create_time: 2015-03-16 15:13:31 Update_time: ... To create an InnoDB table, use the CREATE TABLE ...
https://dev.mysql.com/mysqldump.html
The mysqldump client utility performs logical backups, producing a set of SQL statements that can be executed to reproduce the original database object definitions and table data. It dumps one or more MySQL databases for backup or transfer to ...
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