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https://dev.mysql.com/doc/refman/8.0/en/sys-schema-usage.html
For example, to examine the definitions of the session view and format_bytes() function, use these statements: mysql> SHOW CREATE VIEW sys.session; mysql> SHOW CREATE FUNCTION sys.format_bytes; However, those statements display the definitions in ...
https://dev.mysql.com/doc/refman/8.0/en/tutorial.html
If you are interested only in accessing an existing database, you may want to skip the sections that describe how to create the database and the tables it contains. This chapter provides a tutorial introduction to MySQL by showing how to use the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-config-file.html
Configuring NDB Cluster requires working with two files: my.cnf: Specifies options for all NDB Cluster executables. This file, with which you should be familiar with from previous work with MySQL, must be accessible by each executable running in ...
https://dev.mysql.com/doc/refman/8.0/en/using-systemd.html
This script assists in creating the error log file only if the log location matches a pattern (/var/log/mysql*.log for RPM platforms, /var/log/mysql/*.log for Debian platforms). In other cases, the error log directory must be writable or the error ...If you install MySQL from a source distribution on a platform that uses systemd, obtain systemd support for MySQL by configuring the distribution using the -DWITH_SYSTEMD=1 CMake ...
https://dev.mysql.com/doc/refman/8.0/en/alter-server.html
ALTER SERVER server_name OPTIONS (option [, option] ...) Alters the server information for server_name, adjusting any of the options permitted in the CREATE SERVER statement. For example, to update the USER option: ALTER SERVER s OPTIONS (USER ...
https://dev.mysql.com/doc/refman/8.0/en/bit-value-literals.html
To convert a bit value to printable form, use it in numeric context or use a conversion function such as BIN() or HEX(). A leading 0b is case-sensitive and cannot be written as 0B. In numeric contexts, MySQL treats a bit literal like an integer. To ...
https://dev.mysql.com/doc/refman/8.0/en/case-sensitivity.html
For nonbinary strings (CHAR, VARCHAR, TEXT), string searches use the collation of the comparison operands. For binary strings (BINARY, VARBINARY, BLOB), comparisons use the numeric values of the bytes in the operands; this means that for alphabetic ...
https://dev.mysql.com/doc/refman/8.0/en/charset-national.html
For example, these data type declarations are equivalent: CHAR(10) CHARACTER SET utf8 NATIONAL CHARACTER(10) NCHAR(10) As are these: VARCHAR(10) CHARACTER SET utf8 NATIONAL VARCHAR(10) NVARCHAR(10) NCHAR VARCHAR(10) NATIONAL CHARACTER VARYING(10) ...
https://dev.mysql.com/doc/refman/8.0/en/charset-restrictions.html
Identifiers are stored in mysql database tables (user, db, and so forth) using utf8mb3, but identifiers can contain only characters in the Basic Multilingual Plane (BMP). FULLTEXT indexes cannot be created on a column that uses any of these ...The ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-utf32.html
utf32 takes twice as much space as ucs2 and more space than utf16, but utf32 has the same advantage as ucs2 that it is predictable for storage: The required number of bytes for utf32 equals the number of characters times 4. The utf32 character set ...