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https://dev.mysql.com/doc/refman/5.7/en/using-innodb-tables.html
.frm Files MySQL stores data dictionary information for tables in .frm files in database directories. When MySQL drops a table or a database, it deletes one or more .frm files as well as the corresponding entries inside the InnoDB data dictionary.
https://dev.mysql.com/doc/refman/5.7/en/windows-server-first-start.html
Note The database must be initialized before MySQL can be started. This section gives a general overview of starting the MySQL server. The following sections provide more specific information for starting the MySQL server from the command line or ...
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode.html
Other database systems might use little-endian byte order or a BOM. The Unicode Standard includes characters from the Basic Multilingual Plane (BMP) and supplementary characters that lie outside the BMP. For information about the Unicode Standard ...
https://dev.mysql.com/doc/refman/5.7/en/communication-errors.html
Unsuccessful connection attempts can occur for the following reasons: A client attempts to access a database but has no privileges for it. If connection problems occur such as communication errors or aborted connections, use these sources of ...
https://dev.mysql.com/doc/refman/5.7/en/docker-mysql-getting-started.html
Among other instructions discussed there, it is especially important to back up your database before the upgrade. Warning The MySQL Docker images maintained by the MySQL team are built specifically for Linux platforms. Other platforms are not ...
https://dev.mysql.com/doc/refman/5.7/en/downgrading-to-previous-series.html
Before downgrading to a previous version, it is recommended that you drop the sys schema: DROP DATABASE sys; If you are downgrading to a release that includes the sys schema, mysql_upgrade recreates the sys schema in a compatible form. The effect ...
https://dev.mysql.com/doc/refman/5.7/en/metadata-locking.html
MySQL uses metadata locking to manage concurrent access to database objects and to ensure data consistency. Metadata locking is not a replacement for the table definition cache, and its mutexes and locks differ from the LOCK_open mutex. Metadata ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-general-info.html
While many standard MySQL schemas and applications can work using NDB Cluster, it is also true that unmodified applications and database schemas may be slightly incompatible or have suboptimal performance when run using NDB Cluster (see Section ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-install-windows-binary.html
Since the "world" database takes up # only about 500KB, this should be more than enough for # this example Cluster setup. Instead, you must either escape each backslash character with a second backslash (\\), or replace the backslash with a forward ...You should also have the MySQL client (mysql.exe) on this ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-operations-per-fragment.html
(One use of this is in the NDB implementation of the REPLACE SQL statement.) The tot_key_refs column shows the number of key operations refused by the LDM. The operations_per_fragment table provides information about the operations performed on ...