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https://dev.mysql.com/doc/refman/5.7/en/data-masking-functions.html
Return value: The masked string, or NULL if either margin is negative. Return value: The masked string, or NULL if either margin is negative. Return value: The masked Social Security number as a string, or NULL if the argument is not the correct ...
https://dev.mysql.com/doc/refman/5.7/en/pluggable-authentication-system-variables.html
authentication_ldap_sasl_bind_base_dn Command-Line Format --authentication-ldap-sasl-bind-base-dn=value Introduced 5.7.19 System Variable authentication_ldap_sasl_bind_base_dn Scope Global Dynamic Yes Type String Default Value NULL For SASL LDAP ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-auto-increment-handling.html
An example follows, where c1 is an AUTO_INCREMENT column of table t1: INSERT INTO t1 (c1,c2) VALUES (1,'a'), (NULL,'b'), (5,'c'), (NULL,'d'); Another type of “mixed-mode insert” is INSERT ... To make this clear, consider an example that uses ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-import.html
--output-type=name Command-Line Format --output-type=name Introduced 5.7.18-ndb-7.6.2 Type Enumeration Default Value ndb Valid Values null Set the output type. ndb_import imports CSV-formatted data, such as that produced by mysqldump --tab, ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-replica.html
This section explains the server options and system variables that apply to replicas and contains the following: Startup Options for Replicas Options for Logging Replica Status to Tables System Variables Used on Replicas Specify the options either ...
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/performance-schema-timing.html
The rows that do not contain NULL indicate which timers you can use in setup_timers. The timers in setup_timers that you can use are those that do not have NULL in the other columns. If the values associated with a given timer name are NULL, that ...
https://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html
Table 12.4 Comparison Operators Name Description > Greater than operator >= Greater than or equal operator < Less than operator <>, != Not equal operator <= Less than or equal operator <=> NULL-safe equal to operator = Equal operator BETWEEN ...
https://dev.mysql.com/doc/refman/5.7/en/date-and-time-type-syntax.html
Also, any TIMESTAMP not explicitly declared as NOT NULL permits NULL values. You can also set any TIMESTAMP column to the current date and time by assigning it a NULL value, unless it has been defined with the NULL attribute to permit NULL values.
https://dev.mysql.com/doc/refman/5.7/en/optimizing-myisam-bulk-data-loading.html
These performance tips supplement the general guidelines for fast inserts in Section 8.2.4.1, “Optimizing INSERT Statements”. For a MyISAM table, you can use concurrent inserts to add rows at the same time that SELECT statements are running, if ...