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https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf32.html
The utf32 character set is fixed length (like ucs2 and unlike utf16). utf32 uses 32 bits for every character, unlike ucs2 (which uses 16 bits for every character), and unlike utf16 (which uses 16 bits for some characters and 32 bits for others).
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html
The Unicode Standard includes characters from the Basic Multilingual Plane (BMP) and supplementary characters that lie outside the BMP. For information about the Unicode Standard itself, visit the Unicode Consortium website. BMP characters have ...
https://dev.mysql.com/doc/refman/8.0/en/choosing-types.html
For optimum storage, you should try to use the most precise type in all cases. For example, if an integer column is used for values in the range from 1 to 99999, MEDIUMINT UNSIGNED is the best type. Of the types that represent all the required ...
https://dev.mysql.com/doc/refman/8.0/en/compressed-format.html
Compressed storage format is a read-only format that is generated with the myisampack tool. Compressed tables have the following characteristics: Compressed tables take very little disk space. This minimizes disk usage, which is helpful when using ...
https://dev.mysql.com/doc/refman/8.0/en/constant-folding-optimization.html
Comparisons between constants and column values in which the constant value is out of range or of the wrong type with respect to the column type are now handled once during query optimization rather row-by-row than during execution. The comparisons ...
https://dev.mysql.com/doc/refman/8.0/en/create-table-foreign-keys.html
MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data consistent. A foreign key relationship involves a parent table that holds the initial column ...
https://dev.mysql.com/doc/refman/8.0/en/creating-tables.html
You want a table that contains a record for each of your pets. This can be called the pet table, and it should contain, as a bare minimum, each animal's name. Because the name by itself is not very interesting, the table should contain other ...
https://dev.mysql.com/doc/refman/8.0/en/examples.html
Here are examples of how to solve some common problems with MySQL. Some of the examples use the table shop to hold the price of each article (item number) for certain traders (dealers). Supposing that each trader has a single fixed price per ...
https://dev.mysql.com/doc/refman/8.0/en/explain-output.html
The EXPLAIN statement provides information about how MySQL executes statements. EXPLAIN returns a row of information for each table used in the SELECT statement. It lists the tables in the output in the order that MySQL would read them while ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-thread-pool.html
What is the Thread Pool and what problem does it solve? A.15.2. How does the Thread Pool limit and manage concurrent sessions and transactions for optimal performance and throughput? A.15.3. How is the Thread Pool different from the client side ...