mysql temporary variable

Two types of temporary tables in MySQLbole Online 2016-07-06 05:16:52 Read (4556) Comments (3) Statement: This article by the Sohu public platform to write the author, in addition to the official Sohu account, the view is only representative of

1. Background* temporary table is session-based, only visible on current connection* When this connection (session) is closed, it will be automatically drop. * two different connections (sessions) Use the same temporary table name and do not

Add by Zhj: In the MySQL5.6 of some parameters have been increased, see http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.htmlOriginal: http://mageedu.blog.51cto.com/4265610/1062628Marco Education Linux operation and maintenance

using FilesortThe average person's answer is, "when the row data is too large to allow the memory to tolerate temporary tables generated by the data, they are placed on the disk to sort." Unfortunately, the answer is wrong, and the temp table does

1. download MySql 1. download MySql Open http://www.mysql.com/downloads/mysql/#downloads download in browser My downloaded version is Red Hat 5 version of http://www.mysql.com/downloads/mirror.php? Id = 407552 Upload the file to the server, or

MYSQL: temporary table problems, does not support self-join bitsCN.com MYSQL: temporary table problem, does not support self-join Temporary table Problems The following list indicates limitations on the use of TEMPORARY tables: A temporary table

Where is the temporary file stored in the MySQL database? MySQL uses the value of the environmental variable TMPDIR as the path name of the directory where the temporary file is saved. If TMPDIR is not set, MySQL uses the default value of the system,

MySQL uses the value of the environmental variable TMPDIR as the path name of the directory for saving the temporary file. If TMPDIR is not set, MySQL uses the default value of the system, usually/tmp,/var/tmp, or/usr/tmp. If the file system that

MySQL uses the value of the environmental variable TMPDIR as the path name of the directory for saving the temporary file. MySQL uses the value of the environmental variable TMPDIR as the path name of the directory for saving the temporary file.

In mysql stored procedures, using a temporary table in the cursor can replace the array effect, mysql cursor Mysql does not support arrays. However, sometimes the data of several tables needs to be combined. In the stored procedure, the results