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https://dev.mysql.com/doc/refman/5.7/en/windows-troubleshooting.html
Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist These messages often occur when the MySQL base or data directories are installed in different locations than the default locations (C:\Program Files\MySQL\MySQL ...
https://dev.mysql.com/doc/refman/5.7/en/enum.html
For example, this CREATE TABLE statement does not work because the CONCAT function cannot be used to construct an enumeration value: CREATE TABLE sizes ( size ENUM('small', CONCAT('med','ium'), 'large') ); You also cannot employ a user variable as ... An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation ...
https://dev.mysql.com/doc/refman/5.7/en/general-tablespaces.html
A general tablespace is a shared InnoDB tablespace that is created using CREATE TABLESPACE syntax. The TABLESPACE option can be used with CREATE TABLE to create tables in a general tablespaces, file-per-table tablespace, or in the system tablespace. Creating a General Tablespace General tablespaces are created using CREATE TABLESPACE ...
https://dev.mysql.com/doc/refman/5.7/en/alter-view.html
ALTER [ALGORITHM = {UNDEFINED | MERGE | TEMPTABLE}] [DEFINER = user] [SQL SECURITY { DEFINER | INVOKER }] VIEW view_name [(column_list)] AS select_statement [WITH [CASCADED | LOCAL] CHECK OPTION] This statement changes the definition of a view, ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-file-format-compatibility-checking-table-access.html
All tables using any file format supported by a release can be read or written (assuming the user has sufficient privileges). The setting of the system configuration parameter innodb_file_format can prevent creating a new table that uses a specific ... When a table is first accessed, InnoDB (including some releases prior to InnoDB 1.0) checks that the file format of the tablespace in which the table is stored is fully ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-memory-per-fragment.html
memory_per_fragment Table: Notes memory_per_fragment Table: Examples The memory_per_fragment table provides information about the usage of memory by individual fragments. See the Notes later in this section to see how you can use this to find out ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-status-variables.html
Performance Schema status variables have the following meanings: Performance_schema_accounts_lost The number of times a row could not be added to the accounts table because it was full. Performance_schema_users_lost The number of times a row could ...Performance_schema_digest_lost The number of digest instances that could not be instrumented in the events_statements_summary_by_digest ...
https://dev.mysql.com/doc/refman/5.7/en/can-not-connect-to-server.html
Locate the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters On the Edit menu, click Add Value, and then add the following registry value: Value Name: MaxUserPort Data Type: REG_DWORD Value: 65534 ... A MySQL client on Unix can connect to the mysqld server in two different ways: By using a Unix socket file to connect through a file in the file system (default /tmp/mysql.sock), or by using TCP/IP, which connects through a port ...
https://dev.mysql.com/doc/refman/5.7/en/explain-extended.html
For results consisting of multiple values, a temporary table may be created and you might see <temporary table> instead. <in_optimizer>(query fragment) This is an internal optimizer object with no user significance. <ref_null_helper>(expr) This is ... For SELECT statements, the EXPLAIN statement produces extra (“extended”) information that is not part of EXPLAIN output but can be viewed by issuing a SHOW WARNINGS statement following ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-fine-tuning.html
Note Minimum and maximum word length full-text parameters do not apply to FULLTEXT indexes created using the ngram parser. For an example specific to full-text indexing, see Section 12.9.7, “Adding a User-Defined Collation for Full-Text ...You can ...