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https://dev.mysql.com/doc/refman/5.7/en/charset-metadata.html
If character_set_results is set to NULL, no conversion is performed and the server returns metadata using its original character set (the set indicated by character_set_system). Metadata is “the data about the data.” Anything that describes the ...
https://dev.mysql.com/doc/refman/5.7/en/myisamchk-general-options.html
stats_method influences how NULL values are treated for index statistics collection when the --analyze option is given. The options described in this section can be used for any type of table maintenance operation performed by myisamchk. The ...
https://dev.mysql.com/doc/refman/5.7/en/blob.html
A BLOB is a binary large object that can hold a variable amount of data. These differ only in the maximum length of the values they can hold. These correspond to the four BLOB types and have the same maximum lengths and storage requirements. They ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldumpslow.html
The MySQL slow query log contains information about queries that take a long time to execute (see Section 5.4.5, “The Slow Query Log”). mysqldumpslow parses MySQL slow query log files and summarizes their contents. Normally, mysqldumpslow ...
https://dev.mysql.com/doc/refman/5.7/en/charset-errors.html
If character_set_results has a value of NULL or binary, no conversion occurs. This section describes how the MySQL server uses character sets for constructing error messages. For information about the language of error messages (rather than the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-processes.html
For management nodes and API nodes other than SQL nodes, the value of this column is NULL. This table contains information about NDB Cluster node processes; each node is represented by the row in the table. Only nodes that are connected to the ...
https://dev.mysql.com/doc/refman/5.7/en/sql-prepared-statements.html
Using prepared statements with placeholders for parameter values has the following benefits: Less overhead for parsing the statement each time it is executed. Typically, database applications process large volumes of almost-identical statements, ...
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode-sets.html
This section describes the collations available for Unicode character sets and their differentiating properties. MySQL supports multiple Unicode character sets: utf8mb4: A UTF-8 encoding of the Unicode character set using one to four bytes per ...
https://dev.mysql.com/doc/refman/5.7/en/enterprise-encryption-usage.html
To use MySQL Enterprise Encryption in applications, invoke the functions that are appropriate for the operations you wish to perform. Use the private key to encrypt data and the public key to decrypt it This requires that the members of the key ...
https://dev.mysql.com/doc/refman/5.7/en/error-interfaces.html
Error messages can originate on the server side or the client side, and each error message includes an error code, SQLSTATE value, and message string, as described in Section B.1, “Error Message Sources and Elements”. For lists of server-side, ...