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https://dev.mysql.com/doc/refman/5.7/en/numeric-type-attributes.html
MySQL supports an extension for optionally specifying the display width of integer data types in parentheses following the base keyword for the type. For example, INT(4) specifies an INT with a display width of four digits. This optional display ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-list.html
List partitioning in MySQL is similar to range partitioning in many ways. As in partitioning by RANGE, each partition must be explicitly defined. The chief difference between the two types of partitioning is that, in list partitioning, each ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-pruning.html
The core concept behind partition pruning is relatively simple, and can be described as “Do not scan partitions where there can be no matching values”. By doing so, it is possible to expend much less time and effort in finding matching rows than ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-thread-filtering.html
The threads table contains a row for each server thread. Each row contains information about a thread and indicates whether monitoring is enabled for it. For the Performance Schema to monitor a thread, these things must be true: The ...
https://dev.mysql.com/doc/refman/5.7/en/precision-math-rounding.html
This section discusses precision math rounding for the ROUND() function and for inserts into columns with exact-value types (DECIMAL and integer). The ROUND() function rounds differently depending on whether its argument is exact or approximate: ...
https://dev.mysql.com/doc/refman/5.7/en/problems-with-float.html
Floating-point numbers sometimes cause confusion because they are approximate and not stored as exact values. A floating-point value as written in an SQL statement may not be the same as the value represented internally. Attempts to treat ...
https://dev.mysql.com/doc/refman/5.7/en/programs-overview.html
Later sections provide a more detailed description of each one, with the exception of NDB Cluster programs. Each program's description indicates its invocation syntax and the options that it supports. Section 21.5, “NDB Cluster Programs”, ...
https://dev.mysql.com/doc/refman/5.7/en/range-optimization.html
The range access method uses a single index to retrieve a subset of table rows that are contained within one or several index value intervals. The following sections describe conditions under which the optimizer uses range access. Additionally, for ...
https://dev.mysql.com/doc/refman/5.7/en/replication-setup-replicas.html
Before you proceed, ensure that you have: Configured the source with the necessary configuration properties. Obtained the source's status information, or a copy of the source's binary log index file made during a shutdown for the data snapshot. On ...
https://dev.mysql.com/doc/refman/5.7/en/request-access.html
After the server accepts a connection, it enters Stage 2 of access control. For each request that you issue through the connection, the server determines what operation you want to perform, then checks whether your privileges are sufficient. This ...