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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 ...
https://dev.mysql.com/doc/refman/8.0/en/comments.html
For example, MySQL Server recognizes the STRAIGHT_JOIN keyword in the following statement, but other servers should not: SELECT /*! STRAIGHT_JOIN */ col1 FROM table1,table2 WHERE ... MySQL Server supports three comment styles: From a # character to ...
https://dev.mysql.com/doc/refman/8.0/en/cursors.html
Cursors have these properties: Asensitive: The server may or may not make a copy of its result table Read only: Not updatable Nonscrollable: Can be traversed only in one direction and cannot skip rows Cursor declarations must appear before handler ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking.html
Administration is restricted to authorized users who are granted special privileges so that only they can create and modify the dictionaries. For information about the similarities and differences, see Table 8.45, “Comparison Between Data-Masking ... Note MySQL Enterprise Data Masking and De-Identification is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/8.0/en/error-log-event-fields.html
A user-defined field does not exist until created by a log filter. Error events intended for the error log contain a set of fields, each of which consists of a key/value pair. An event field may be classified as core, optional, or user-defined: A ...
https://dev.mysql.com/doc/refman/8.0/en/geometry-well-formedness-validity.html
Spatial import functions that parse WKT or WKB values raise an error for attempts to create a geometry that is not syntactically well-formed. Syntactic well-formedness is also checked for attempts to store geometries into tables. For geometry ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-distributed-recovery-fault.html
Warning For a remote cloning operation, user-created tablespaces and data on the recipient (the joining member) are dropped before the remote cloning operation begins to transfer the data from the donor. The donor for distributed recovery is ...