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https://dev.mysql.com/doc/refman/5.7/en/upgrading-from-previous-series.html
Implementation of the ONLY_FULL_GROUP_BY SQL mode has been made more sophisticated, to no longer reject deterministic queries that previously were rejected. In consequence, ONLY_FULL_GROUP_BY is now enabled by default, to prohibit nondeterministic ... Before upgrading to MySQL 5.7, review the changes described in this section to identify those that apply to your current MySQL installation and ...
https://dev.mysql.com/doc/refman/5.7/en/data-directory-initialization.html
Either create the account if it does not exist (see Create a mysql User and Group), or substitute the name of a different existing login account that you plan to use for running the server. Also make sure to specify as necessary other parameters ...
https://dev.mysql.com/doc/refman/5.7/en/extensions-to-ansi.html
You don't need to name all selected columns in the GROUP BY clause. You can specify ASC and DESC with GROUP BY, not just with ORDER BY. MySQL Server supports some extensions that are likely not to be found in other SQL DBMSs. Be warned that if you ...
https://dev.mysql.com/doc/refman/5.7/en/faqs-mysql-cluster.html
For this reason, if you do run multiple data nodes on a single machine, it is extremely important that they be set up in such a way that the failure of this machine does not cause the loss of all the data nodes in a given node group. When all data ... In the following section, we answer questions that are frequently asked about NDB Cluster and the NDB storage ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-init-startup-configuration.html
You can place InnoDB settings in the [mysqld] group of any option file that your server reads when it starts. The following options can be used to modify the default configuration: innodb_log_group_home_dir defines directory path to the InnoDB log ... The first decisions to make about InnoDB configuration involve the configuration of data files, log files, page size, and memory buffers, which should be configured before initializing ...
https://dev.mysql.com/doc/refman/5.7/en/join.html
index_hint: { USE {INDEX|KEY} [FOR {JOIN|ORDER BY|GROUP BY}] ([index_list]) | {IGNORE|FORCE} {INDEX|KEY} [FOR {JOIN|ORDER BY|GROUP BY}] (index_list) } index_list: index_name [, index_name] ... MySQL supports the following JOIN syntax for the ...
https://dev.mysql.com/doc/refman/5.7/en/limit-optimization.html
In some cases, a GROUP BY can be resolved by reading the index in order (or doing a sort on the index), then calculating summaries until the index value changes. In this case, LIMIT row_count does not calculate any unnecessary GROUP BY values. If ...
https://dev.mysql.com/doc/refman/5.7/en/multiple-windows-services.html
In this case, you can use the [mysqld1] group for 5.7.9 and the [mysqld2] group for 5.7.44. In this case, each file should list options using a [mysqld] group. On Windows, a MySQL server can run as a Windows service. The procedures for installing, ...
https://dev.mysql.com/doc/refman/5.7/en/myisamchk.html
myisamchk supports the following options, which can be specified on the command line or in the [myisamchk] group of an option file. The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-basics.html
There are as many data nodes as there are fragment replicas, times the number of fragments (see Section 21.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”). For a brief introduction to the relationships between nodes, ...