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https://dev.mysql.com/doc/refman/9.7/en/charset-unicode-utf8mb3.html
The utf8mb3 character set has these characteristics: Supports BMP characters only (no support for supplementary characters) Requires a maximum of three bytes per multibyte character. Applications that use UTF-8 data but require supplementary ...
https://dev.mysql.com/doc/refman/9.7/en/comparison-operators.html
Table 14.4 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/9.7/en/converting-tables-to-innodb.html
If the table already has a primary key on some longer column, such as a VARCHAR, consider adding a new unsigned AUTO_INCREMENT column and switching the primary key to that, even if that column is not referenced in queries. If you have MyISAM tables ...
https://dev.mysql.com/doc/refman/9.7/en/create-event.html
CREATE [DEFINER = user] EVENT [IF NOT EXISTS] event_name ON SCHEDULE schedule [ON COMPLETION [NOT] PRESERVE] [ENABLE | DISABLE | DISABLE ON {REPLICA | SLAVE}] [COMMENT 'string'] DO event_body schedule: { AT timestamp [+ INTERVAL interval] ... The ...
https://dev.mysql.com/doc/refman/9.7/en/create-table-select.html
For example, the AUTO_INCREMENT attribute is not preserved, and VARCHAR columns can become CHAR columns. You can create one table from another by adding a SELECT statement at the end of the CREATE TABLE statement: CREATE TABLE new_tbl [AS] SELECT * ...
https://dev.mysql.com/doc/refman/9.7/en/dynamic-format.html
Dynamic storage format is used if a MyISAM table contains any variable-length columns (VARCHAR, VARBINARY, BLOB, or TEXT), or if the table was created with the ROW_FORMAT=DYNAMIC table option. Dynamic format is a little more complex than static ...
https://dev.mysql.com/doc/refman/9.7/en/faqs-mysql-cluster.html
This means that (for example) each Disk Data table record containing a VARCHAR(255) column requires space for 255 characters (as required for the character set and collation being used for the table), regardless of the actual number of characters ...
https://dev.mysql.com/doc/refman/9.7/en/federated-create-connection.html
For example: CREATE TABLE federated_table ( id INT(20) NOT NULL AUTO_INCREMENT, name VARCHAR(32) NOT NULL DEFAULT '', other INT(20) NOT NULL DEFAULT '0', PRIMARY KEY (id), INDEX name (name), INDEX other_key (other) ) ENGINE=FEDERATED DEFAULT ... To ...
https://dev.mysql.com/doc/refman/9.7/en/federated-create-server.html
If you are creating a number of FEDERATED tables on the same server, or if you want to simplify the process of creating FEDERATED tables, you can use the CREATE SERVER statement to define the server connection parameters, just as you would with the ...
https://dev.mysql.com/doc/refman/9.7/en/federated-create.html
To create a FEDERATED table you should follow these steps: Create the table on the remote server. Alternatively, make a note of the table definition of an existing table, perhaps using the SHOW CREATE TABLE statement. Create the table on the local ...