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https://dev.mysql.com/doc/refman/9.7/en/comparison-operators.html
Table 14.4 Comparison Operators Name Description > Greater than operator >= Greater than or equal operator < Less than operator <>, != Not equal operator <= Less than or equal operator <=> NULL-safe equal to operator = Equal operator BETWEEN ...
https://dev.mysql.com/doc/refman/9.7/en/glossary.html
These terms are commonly used in information about the MySQL database server. Files with this extension are always included in backups produced by the mysqlbackup command of the MySQL Enterprise Backup product. Files with this extension are always ...
https://dev.mysql.com/doc/refman/9.7/en/timestamp-initialization.html
TIMESTAMP and DATETIME columns can be automatically initialized and updated to the current date and time (that is, the current timestamp). For any TIMESTAMP or DATETIME column in a table, you can assign the current timestamp as the default value, ...
https://dev.mysql.com/doc/refman/9.7/en/firewall-plugin.html
This section contains information about the MySQL Enterprise Firewall plugin. Important The firewall plugin is deprecated in favor of a firewall component which implements most of the same functionality but uses the superior component architecture.
https://dev.mysql.com/doc/refman/9.7/en/aggregate-functions.html
This section describes aggregate functions that operate on sets of values. They are often used with a GROUP BY clause to group values into subsets. If you use an aggregate function in a statement containing no GROUP BY clause, it is equivalent to ...
https://dev.mysql.com/doc/refman/9.7/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* ...
https://dev.mysql.com/doc/refman/9.7/en/explain-output.html
The EXPLAIN statement provides information about how MySQL executes statements. EXPLAIN returns a row of information for each table used in the SELECT statement. It lists the tables in the output in the order that MySQL would read them while ...
https://dev.mysql.com/doc/refman/9.7/en/nested-join-optimization.html
The following discussion refers to the join syntax described in Section 15.2.13.2, “JOIN Clause”. The syntax of table_factor is extended in comparison with the SQL Standard. The latter accepts only table_reference, not a list of them inside a ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-ndbinfo.html
ndbinfo is a database containing information specific to NDB Cluster. This database contains a number of tables, each providing a different sort of data about NDB Cluster node status, resource usage, and operations. You can find more detailed ...
https://dev.mysql.com/doc/refman/9.7/en/faqs-cjk.html
This set of Frequently Asked Questions derives from the experience of MySQL's Support and Development groups in handling many inquiries about CJK (Chinese-Japanese-Korean) issues. What problems should I be aware of when working with the Big5 ...