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https://dev.mysql.com/doc/refman/5.7/en/sys-metrics.html
This view summarizes MySQL server metrics to show variable names, values, types, and whether they are enabled. The metric type determines the source from which the name is taken: For global status variables: The VARIABLE_NAME column of the ...
https://dev.mysql.com/doc/refman/5.7/en/sys-quote-identifier.html
Given a string argument, this function produces a quoted identifier suitable for inclusion in SQL statements. This is useful when a value to be used as an identifier is a reserved word or contains backtick (`) characters. Example mysql> SELECT ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-object-index.html
The following tables list sys schema objects and provide a short description of each one.
https://dev.mysql.com/doc/refman/5.7/en/tracing-memory-usage.html
Each stored trace is a string, which is extended (using realloc()) as optimization progresses by appending more data to it. The optimizer_trace_max_mem_size server system variable sets a limit on the total amount of memory used by all traces ...
https://dev.mysql.com/doc/refman/5.7/en/two-digit-years.html
Date values with 2-digit years are ambiguous because the century is unknown. Such values must be interpreted into 4-digit form because MySQL stores years internally using 4 digits. For DATETIME, DATE, and TIMESTAMP types, MySQL interprets dates ...
https://dev.mysql.com/doc/refman/5.7/en/union.html
[UNION [ALL | DISTINCT] SELECT ...] UNION combines the result from multiple SELECT statements into a single result set. Selected columns listed in corresponding positions of each SELECT statement should have the same data type. For example, the ...
https://dev.mysql.com/doc/refman/5.7/en/verifying-md5-checksum.html
winMd5Sum is a graphical MD5 checking tool that can be obtained from http://www.nullriver.com/index/products/winmd5sum. After you have downloaded a MySQL package, you should make sure that its MD5 checksum matches the one provided on the MySQL ...