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https://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html
For additional examples of row comparisons in the context of row subqueries, see Section 13.2.10.5, “Row Subqueries”. IN() syntax can also be used to write certain types of subqueries. Table 12.4 Comparison Operators Name Description > Greater ...
https://dev.mysql.com/doc/refman/5.7/en/create-tablespace.html
The precise syntax and semantics depend on the storage engine used. In standard MySQL 5.7 releases, this is always an InnoDB tablespace. MySQL NDB Cluster 7.5 also supports tablespaces using the NDB storage engine in addition to those using InnoDB.
https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html
This section describes the functions that can be used to manipulate temporal values. See Section 11.2, “Date and Time Data Types”, for a description of the range of values each date and time type has and the valid formats in which values may be ...
https://dev.mysql.com/doc/refman/5.7/en/date-calculations.html
MySQL provides several functions that you can use to perform calculations on dates, for example, to calculate ages or extract parts of dates. To determine how many years old each of your pets is, use the TIMESTAMPDIFF() function. Its arguments are ...
https://dev.mysql.com/doc/refman/5.7/en/engine-condition-pushdown-optimization.html
This optimization improves the efficiency of direct comparisons between a nonindexed column and a constant. In such cases, the condition is “pushed down” to the storage engine for evaluation. This optimization can be used only by the NDB ...
https://dev.mysql.com/doc/refman/5.7/en/generated-column-index-optimizations.html
For example: CREATE TABLE t1 (f1 INT, gc INT AS (f1 + 1) STORED, INDEX (gc)); The generated column, gc, is defined as the expression f1 + 1. The column is also indexed and the optimizer can take that index into account during execution plan ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-files-table.html
The FILES table provides information about the files in which MySQL tablespace data is stored. In NDB Cluster, this table also provides information about the files in which NDB Cluster Disk Data tables are stored. For additional information ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-buffer-page-lru-table.html
The INNODB_BUFFER_PAGE_LRU table provides information about the pages in the InnoDB buffer pool; in particular, how they are ordered in the LRU list that determines which pages to evict from the buffer pool when it becomes full. The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-change-buffer.html
During this time, disk I/O is increased, which can cause a significant slowdown for disk-bound queries. To avoid impacting performance, reproduce the issue you want to investigate on a test instance and run your queries on the test instance. The ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-compression-tuning.html
Whether the workload is more like a data warehouse (primarily queries) or an OLTP system (mix of queries and DML). For more elaborate tests involving workloads with multiple compressed tables, run queries against the Information Schema ... Most ...