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https://dev.mysql.com/doc/refman/8.0/en/comparisons-using-subqueries.html
The most common use of a subquery is in the form: non_subquery_operand comparison_operator (subquery) Where comparison_operator is one of these operators: = > < >= <= <> != <=> For example: ... WHERE 'a' = (SELECT column1 FROM t1) MySQL also ...
https://dev.mysql.com/doc/refman/8.0/en/compilation-problems.html
If you do reconfigure, take note of the following: If CMake is run after it has previously been run, it may use information that was gathered during its previous invocation. When CMake starts, it looks for that file and reads its contents if it ...
https://dev.mysql.com/doc/refman/8.0/en/compiling-for-debugging.html
If you have some very specific problem, you can always try to debug MySQL. To do this you must configure MySQL with the -DWITH_DEBUG=1 option. You can check whether MySQL was compiled with debugging by doing: mysqld --help. If the --debug flag is ...
https://dev.mysql.com/doc/refman/8.0/en/connecting-disconnecting.html
To connect to the server, you usually need to provide a MySQL user name when you invoke mysql and, most likely, a password. If the server runs on a machine other than the one where you log in, you must also specify a host name. Contact your ...
https://dev.mysql.com/doc/refman/8.0/en/connecting-using-uri-or-key-value-pairs.html
This section describes use of URI-like connection strings or key-value pairs to specify how to establish connections to the MySQL server, for clients such as MySQL Shell. For information on establishing connections using command-line options, for ...
https://dev.mysql.com/doc/refman/8.0/en/connecting.html
This section describes use of command-line options to specify how to establish connections to the MySQL server, for clients such as mysql or mysqldump. For information on establishing connections using URI-like connection strings or key-value ...
https://dev.mysql.com/doc/refman/8.0/en/connection-compression-control.html
Connections to the server can use compression on the traffic between client and server to reduce the number of bytes sent over the connection. By default, connections are uncompressed, but can be compressed if the server and the client agree on a ...
https://dev.mysql.com/doc/refman/8.0/en/connection-control-plugin-variables.html
This section describes the system and status variables that the CONNECTION_CONTROL plugin provides to enable its operation to be configured and monitored. If an account has reached the point where connection responses are delayed, a delay also ...
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/constraint-foreign-key.html
Foreign keys let you cross-reference related data across tables, and foreign key constraints help keep this spread-out data consistent. MySQL supports ON UPDATE and ON DELETE foreign key references in CREATE TABLE and ALTER TABLE statements. The ...