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https://dev.mysql.com/doc/refman/5.7/en/macos-installation-pkg.html
This cannot be recovered so you must save this password for the initial login to MySQL. For example: Figure 2.17 MySQL Package Installer Wizard: Temporary Root Password Note MySQL expires this temporary root password after the initial login and ...
https://dev.mysql.com/doc/refman/5.7/en/do.html
In most respects, DO is shorthand for SELECT expr, ..., but has the advantage that it is slightly faster when you do not care about the result. For example, DO id FROM t1 is invalid because it references a table. DO is useful primarily with ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-doublewrite-buffer.html
Because the doublewrite buffer setting is global, doublewrite buffering is also disabled for data files residing on non-Fusion-io hardware. The doublewrite buffer is a storage area where InnoDB writes pages flushed from the buffer pool before ...If ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-filtering-names.html
To check which instrument or consumer names a pattern matches, perform a simple test: SELECT NAME FROM performance_schema.setup_instruments WHERE NAME LIKE 'pattern'; SELECT NAME FROM performance_schema.setup_consumers WHERE NAME LIKE 'pattern'; For ... Names given for filtering operations can be as specific or general as ...WHERE NAME LIKE 'wait/io/file/%'; The pattern '%/file/%' ...
https://dev.mysql.com/doc/refman/5.7/en/reset-master.html
For a server where binary logging is enabled (log_bin is ON), RESET MASTER deletes all existing binary log files and resets the binary log index file, resetting the server to its state before binary logging was started. For a server where GTIDs are ... RESET MASTER Warning Use this statement with caution to ensure you do not lose any wanted binary log file data and GTID execution ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-stage-tables.html
Configuring Stage Event Collection Stage Event Progress Information Configuring Stage Event Collection To control whether to collect stage events, set the state of the relevant instruments and consumers: The setup_instruments table contains ... The ...Within the event hierarchy, wait events nest within stage events, which nest within statement events, which nest within transaction ...
https://dev.mysql.com/doc/refman/5.7/en/precision-math-expressions.html
To turn on all restrictions, you can simply use TRADITIONAL mode, which includes both strict mode values and ERROR_FOR_DIVISION_BY_ZERO: SET sql_mode='TRADITIONAL'; If a number is inserted into an exact type column (DECIMAL or integer), it is ...For ... With precision math, exact-value numbers are used as given whenever ...
https://dev.mysql.com/doc/refman/5.7/en/compressed-format.html
Compressed storage format is a read-only format that is generated with the myisampack tool. The header for a row takes up one to three bytes depending on the biggest row in the table. For example, a BIGINT column (eight bytes) can be stored as a ...
https://dev.mysql.com/doc/refman/5.7/en/data-masking-installation.html
For general information about installing or uninstalling plugins and loadable functions, see Section 5.5.1, “Installing and Uninstalling Plugins”, and Section 5.6.1, “Installing and Uninstalling Loadable Functions”. If necessary, configure ... This section describes how to install or uninstall MySQL Enterprise Data Masking and De-Identification, which is implemented as a plugin library file containing a plugin and several loadable ...
https://dev.mysql.com/doc/refman/5.7/en/fractional-seconds.html
MySQL has fractional seconds support for TIME, DATETIME, and TIMESTAMP values, with up to microseconds (6 digits) precision: To define a column that includes a fractional seconds part, use the syntax type_name(fsp), where type_name is TIME, ...A ...