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https://dev.mysql.com/doc/refman/9.7/en/window-function-descriptions.html
LAG() (and the similar LEAD() function) are often used to compute differences between rows. The last row shows the same thing when there is no next row for LEAD(). LAG() and LEAD() also serve to compute sums rather than differences. LEAD(expr [, N[, ... This section describes nonaggregate window functions that, for each row from a query, perform a calculation using rows related to that ...
https://dev.mysql.com/doc/refman/9.7/en/fulltext-boolean.html
InnoDB full-text search does not support the use of a leading plus sign with wildcard ('+*'), a plus and minus sign combination ('+-'), or leading a plus and minus sign combination ('+-apple'). The boolean full-text search capability supports the ...
https://dev.mysql.com/doc/refman/9.7/en/server-system-variables.html
Setting the value excessively high can negatively affect performance and lead to out-of-memory (OOM) errors. If a tag value of tag is specified, it is appended to the server identifier with a leading hyphen, resulting in a syslog identifier of ...
https://dev.mysql.com/doc/refman/9.7/en/string-functions.html
TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str), TRIM([remstr FROM] str) Returns the string str with all remstr prefixes or suffixes removed. If none of the specifiers BOTH, LEADING, or TRAILING is given, BOTH is assumed. mysql> SELECT TRIM(' ...For functions that operate on string positions, the first position is numbered ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-ndbd-definition.html
DataMemory can be changed, but decreasing it can be risky; doing so can easily lead to a node or even an entire NDB Cluster that is unable to restart due to there being insufficient memory space. Because full parallelism in such cases can lead to ...
https://dev.mysql.com/doc/refman/9.7/en/optimizer-hints.html
If the hint includes no leading @query_block_name, the hint applies to the query block in which it occurs. If the hint includes no leading @query_block_name, the hint applies to the query block in which it occurs. If the hint includes no leading ...
https://dev.mysql.com/doc/refman/9.7/en/built-in-function-reference.html
The following table lists each built-in (native) function and operator and provides a short description of each one. For a table listing functions that are loadable at runtime, see Section 14.2, “Loadable Function Reference”. ->> Return value ...
https://dev.mysql.com/doc/refman/9.7/en/dbug-package.html
With a leading + or -, the modifiers in the list are added to or subtracted from the current modifier list. The MySQL server and most MySQL clients are compiled with the DBUG package originally created by Fred Fish. When you have configured MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/hexadecimal-literals.html
Lettercase of the digits and of any leading X does not matter. A leading 0x is case-sensitive and cannot be written as 0X. Hexadecimal literal values are written using X'val' or 0xval notation, where val contains hexadecimal digits (0..9, A..F).
https://dev.mysql.com/doc/refman/9.7/en/load-data.html
If the file name is a relative path name with leading components, the server looks for the file relative to its data directory. If the file name has no leading components, the server looks for the file in the database directory of the default ...The ...