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https://dev.mysql.com/doc/refman/5.7/en/example-auto-increment.html
For example: INSERT INTO animals (id,name) VALUES(0,'groundhog'); If the column is declared NOT NULL, it is also possible to assign NULL to the column to generate sequence numbers. For example: INSERT INTO animals (id,name) VALUES(NULL,'squirrel'); ...You can also explicitly assign 0 to the column to generate sequence numbers, unless the NO_AUTO_VALUE_ON_ZERO SQL mode is ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-functional-dependence.html
A UNIQUE index over a NOT NULL column could be used instead of a primary key and the same functional dependence would apply. As with the previous example, a UNIQUE key over NOT NULL columns could be used instead of a primary key. If in the join ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-transactions-current-table.html
END_EVENT_ID This column is set to NULL when the event starts and updated to the thread current event number when the event ends. If an event is produced from an instrument that has TIMED = NO, timing information is not collected, and TIMER_START, ...The table stores one row per thread showing the current status of the thread's most recent monitored transaction event, so there is no system variable for configuring the table ...
https://dev.mysql.com/doc/refman/5.7/en/replication-gtids-concepts.html
A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin (the source). This identifier is unique not only to the server on which it originated, but is unique across ...
https://dev.mysql.com/doc/refman/5.7/en/show-events.html
row *************************** Db: myschema Name: e_daily Definer: jon@ghidora Time zone: SYSTEM Type: RECURRING Execute at: NULL Interval value: 1 Interval field: DAY Starts: 2018-08-08 11:06:34 Ends: NULL Status: ENABLED Originator: 1 ... SHOW ...
https://dev.mysql.com/doc/refman/5.7/en/tracing-example.html
(Observe that it could have a match, were the operator a null-safe equals <=>). Now we can examine the trace, whose first column (QUERY), containing the original statement to be traced, is shown here: SELECT * FROM ...
https://dev.mysql.com/doc/refman/5.7/en/data-masking-usage.html
General-Purpose Masking Functions mask_inner() and mask_outer() are general-purpose functions that mask parts of arbitrary strings based on position within the string: mask_inner() masks the interior of its string argument, leaving the ends unmasked. Converting the value to a binary string ensures that the function sees an argument of length ... Before using MySQL Enterprise Data Masking and De-Identification, install it according to the instructions provided at ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-binary-log.html
--binlog-do-db=db_name Command-Line Format --binlog-do-db=name Type String This option affects binary logging in a manner similar to the way that --replicate-do-db affects replication. --binlog-ignore-db=db_name Command-Line Format ... Startup ...
https://dev.mysql.com/doc/refman/5.7/en/loading-tables.html
Suppose that Diane gets a new hamster named “Puffball.” You could add a new record using an INSERT statement like this: mysql> INSERT INTO pet VALUES ('Puffball','Diane','hamster','f','1999-03-30',NULL); String and date values are specified as ...For missing values (such as unknown sexes or death dates for animals that are still living), you can use NULL ...
https://dev.mysql.com/doc/refman/5.7/en/gis-mysql-specific-functions.html
If any argument does not represent a LinearRing (that is, not a closed and simple LineString), the return value is NULL. If any argument is not a proper WKB or geometry representation of the proper object type, the return value is NULL. MySQL ...