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Search Results
https://dev.mysql.com/doc/refman/5.7/en/group-by-modifiers.html
The GROUP BY clause permits a WITH ROLLUP modifier that causes summary output to include extra rows that represent higher-level (that is, super-aggregate) summary operations. ROLLUP thus enables you to answer questions at multiple levels of ...
https://dev.mysql.com/doc/refman/5.7/en/load-xml.html
The tagname in the optional ROWS IDENTIFIED BY clause must also be given as a literal string, and must be surrounded by angle brackets (< and >). LOAD XML acts as the complement of running the mysql client in XML output mode (that is, starting the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-command-options.html
mysql supports the following options, which can be specified on the command line or in the [mysql] and [client] groups of an option file. For information about option files used by MySQL programs, see Section 4.2.2.2, “Using Option Files”. This ...
https://dev.mysql.com/doc/refman/5.7/en/server-logs.html
MySQL Server has several logs that can help you find out what activity is taking place. (The DDL log is always created when required, and has no user-configurable options; see Section 5.4.6, “The DDL Log”.) The following log-specific sections ...
https://dev.mysql.com/doc/refman/5.7/en/column-indexes.html
Optimizations are applied to certain kinds of FULLTEXT queries against single InnoDB tables. Queries with these characteristics are particularly efficient: FULLTEXT queries that only return the document ID, or the document ID and the search rank.
https://dev.mysql.com/doc/refman/5.7/en/fulltext-boolean.html
InnoDB tables require a FULLTEXT index on all columns of the MATCH() expression to perform boolean queries. Boolean queries against a MyISAM search index can work even without a FULLTEXT index, although a search executed in this fashion would be ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-stopwords.html
The stopword list is loaded and searched for full-text queries using the server character set and collation (the values of the character_set_server and collation_server system variables). False hits or misses might occur for stopword lookups if the ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-fulltext-index.html
Full-text indexes are created on text-based columns (CHAR, VARCHAR, or TEXT columns) to speed up queries and DML operations on data contained within those columns. The data that is already flushed to disk (to the auxiliary index tables) is not ...A ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-sql-statements.html
However, you can use LIKE to filter queries against the Information Schema ENGINES table, as discussed in the next item. This section discusses several SQL statements that can prove useful in managing and monitoring a MySQL server that is connected ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-nutshell.html
Implementation for the ONLY_FULL_GROUP_BY SQL mode has been made more sophisticated, to no longer reject deterministic queries that previously were rejected. In consequence, this mode is now enabled by default, to prohibit only nondeterministic ...