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https://dev.mysql.com/doc/connector-j/en/connector-j-support-community.html
You can join the #connectors channel in the MySQL Community Slack workspace, where you can get help directly from MySQL developers and other users.
https://dev.mysql.com/doc/connector-j/en/connector-j-using-xdevapi.html
Connector/J 9.5 supports the X DevAPI, through which native support by MySQL for JSON, NoSQL, document collection, and other features are provided to Java applications. See Using MySQL as a Document Store, the X DevAPI User Guide, and the ...
https://dev.mysql.com/doc/refman/8.4/en/adding-character-set.html
This section discusses the procedure for adding a character set to MySQL. To use the following instructions, you must have a MySQL source distribution. The proper procedure depends on whether the character set is simple or complex: If the character ...
https://dev.mysql.com/doc/refman/8.4/en/ansi-diff-select-into-table.html
For example: INSERT INTO tbl_temp2 (fld_id) SELECT tbl_temp1.fld_order_id FROM tbl_temp1 WHERE tbl_temp1.fld_order_id > 100; Alternatively, you can use SELECT ... The same syntax can also be used inside stored routines using cursors and local ...
https://dev.mysql.com/doc/refman/8.4/en/backup-strategy-summary.html
But to make sure that you can sleep well, observe the following guidelines: Always tun the MySQL server with binary logging enabled (that is the default setting for MySQL 8.4). Make periodic full backups, using the mysqldump command shown earlier in ... In case of an operating system crash or power failure, InnoDB itself does all the job of recovering ...
https://dev.mysql.com/doc/refman/8.4/en/cache-index.html
A key cache must exist before you assign indexes to it, or an error occurs: mysql> CACHE INDEX t1 IN non_existent_cache; ERROR 1284 (HY000): Unknown key cache 'non_existent_cache' By default, table indexes are assigned to the main (default) key ...| ...
https://dev.mysql.com/doc/refman/8.4/en/charset-ce-sets.html
MySQL provides some support for character sets used in the Czech Republic, Slovakia, Hungary, Romania, Slovenia, Croatia, Poland, and Serbia (Latin).
https://dev.mysql.com/doc/refman/8.4/en/charset-charsets.html
There is one subsection for each group of related character sets. To list the available character sets and their default collations, use the SHOW CHARACTER SET statement or query the INFORMATION_SCHEMA CHARACTER_SETS table. To avoid choosing the ...
https://dev.mysql.com/doc/refman/8.4/en/charset-collation-names.html
MySQL collation names follow these conventions: A collation name starts with the name of the character set with which it is associated, generally followed by one or more suffixes indicating other collation characteristics. For Unicode character ...
https://dev.mysql.com/doc/refman/8.4/en/charset-column.html
If you use ALTER TABLE to convert a column from one character set to another, MySQL attempts to map the data values, but if the character sets are incompatible, there may be data loss. Every “character” column (that is, a column of type CHAR, ...