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https://dev.mysql.com/doc/refman/5.7/en/string-type-syntax.html
CHAR(0) is also quite nice when you need a column that can take only two values: A column that is defined as CHAR(0) NULL occupies only one bit and can take only the values NULL and '' (the empty string). A string object that can have only one ...If ...
https://dev.mysql.com/doc/refman/5.7/en/string-literals.html
A string is a sequence of bytes or characters, enclosed within either single quote (') or double quote (") characters. Examples: 'a string' "another string" Quoted strings placed next to each other are concatenated to a single string. The following ...It has a character set other than binary and a collation that is compatible with the character ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-connection-strings.html
With the exception of the NDB Cluster management server (ndb_mgmd), each node that is part of an NDB Cluster requires a connection string that points to the management server's location. This connection string is used in establishing a connection ...This port should always be available on the network because it has been assigned by IANA for this purpose (see http://www.iana.org/assignments/port-numbers for ...
https://dev.mysql.com/doc/refman/5.7/en/string-collating.html
If the sorting rules for your language are too complex to be handled with simple arrays, you must define string collating functions in the ctype-MYSET.c source file in the strings directory. Look at the ctype-*.c files in the strings directory, such ... For a simple character set named MYSET, sorting rules are specified in the MYSET.xml configuration file using <map> array elements within <collation> ...
https://dev.mysql.com/doc/refman/5.7/en/string-types.html
The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. For information about storage requirements of the string data types, see Section 11.7, “Data Type Storage Requirements”. For descriptions of functions that ...
https://dev.mysql.com/doc/refman/5.7/en/account-upgrades.html
The MySQL server authenticates connection attempts for each account listed in the mysql.user system table using the authentication plugin named in the plugin column. If the plugin column is empty, the server authenticates the account as follows: ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-options-variables.html
Important Because each SQL node using connection pooling occupies multiple API node slots—each slot having its own node ID in the cluster—you must not use a node ID as part of the cluster connection string when starting any mysqld process that ... This section provides information about MySQL server options, server and status variables that are specific to NDB ...
https://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html
Table 12.4 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/5.7/en/get-diagnostics.html
The first value is a non-NULL string and the second is NULL. For example, the handler maps the NULL insert to an empty-string insert and displays the result. Within a stored procedure p(), we attempt to insert two values into a table that contains a ... GET [CURRENT | STACKED] DIAGNOSTICS { statement_information_item [, statement_information_item] ...
https://dev.mysql.com/doc/refman/5.7/en/json-search-functions.html
Returns NULL if any argument is NULL, or if the path argument does not identify a section of the target document. Returns NULL if any argument is NULL or no paths locate a value in the document. column->path In MySQL 5.7.9 and later, the -> operator ... The functions in this section perform search operations on JSON values to extract data from them, report whether data exists at a location within them, or report the path to data within ...