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https://dev.mysql.com/doc/refman/9.7/en/privileges-provided.html
The privileges granted to a MySQL account determine which operations the account can perform. MySQL privileges differ in the contexts in which they apply and at different levels of operation: Administrative privileges enable users to manage ...
https://dev.mysql.com/doc/refman/9.7/en/problems-connecting.html
If you encounter problems when you try to connect to the MySQL server, the following items describe some courses of action you can take to correct the problem. To correct this when you invoke a client program, specify a --port option to indicate ...
https://dev.mysql.com/doc/refman/9.7/en/problems-with-null.html
The concept of the NULL value is a common source of confusion for newcomers to SQL, who often think that NULL is the same thing as an empty string ''. For example, the following statements are completely different: mysql> INSERT INTO my_table ...
https://dev.mysql.com/doc/refman/9.7/en/programs-development.html
This section describes some utilities that you may find useful when developing MySQL programs. In shell scripts, you can use the my_print_defaults program to parse option files and see what options would be used by a given program. This works well ...
https://dev.mysql.com/doc/refman/9.7/en/proxy-users.html
The plugin that authenticates a given connection may request that the connecting (external) user be treated as a different user for privilege-checking purposes. This enables the external user to be a proxy for the second user; that is, to assume the ...
https://dev.mysql.com/doc/refman/9.7/en/purge-binary-logs.html
PURGE BINARY LOGS { TO 'log_name' | BEFORE datetime_expr } The binary log is a set of files that contain information about data modifications made by the MySQL server. The log consists of a set of binary log files, plus an index file (see Section ...
https://dev.mysql.com/doc/refman/9.7/en/query-attributes.html
The most visible part of an SQL statement is the text of the statement. Clients can also define query attributes that apply to the next statement sent to the server for execution: Attributes are defined prior to sending the statement. Attributes ...
https://dev.mysql.com/doc/refman/9.7/en/recovery-from-backups.html
Now, suppose that we have a catastrophic unexpected exit on Wednesday at 8 a.m. To recover, first we restore the last full backup we have (the one from Sunday 1 p.m.). The full backup file is just a set of SQL statements, so restoring it is very ...
https://dev.mysql.com/doc/refman/9.7/en/replica-io-thread-states.html
The following list shows the most common states you see in the State column for a replication I/O (receiver) thread on a replica server. This state also appears in the Replica_IO_State column displayed by SHOW REPLICA STATUS, so you can get a good ...
https://dev.mysql.com/doc/refman/9.7/en/replica-logs-relaylog.html
The relay log, like the binary log, consists of a set of numbered files containing events that describe database changes, and an index file that contains the names of all used relay log files. The default location for relay log files is the data ...