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https://dev.mysql.com/doc/refman/9.7/en/optimizing-innodb-storage-layout.html
Once your data reaches a stable size, or a growing table has increased by tens or some hundreds of megabytes, consider using the OPTIMIZE TABLE statement to reorganize the table and compact any wasted space. The reorganized tables require less disk ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-limitations-partitioning-keys-unique-keys.html
This section discusses the relationship of partitioning keys with primary keys and unique keys. The rule governing this relationship can be expressed as follows: All columns used in the partitioning expression for a partitioned table must be part ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-management-exchange.html
Table nt contains no foreign key references, and no other table has any foreign keys that refer to nt. There are no rows in nt that lie outside the boundaries of the partition definition for p. For InnoDB tables, both tables must use the same row ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-overview.html
This section provides a conceptual overview of partitioning in MySQL 9.7. For information on partitioning restrictions and feature limitations, see Section 26.6, “Restrictions and Limitations on Partitioning”. The SQL standard does not provide ...
https://dev.mysql.com/doc/refman/9.7/en/problems-with-null.html
The concept of the NULL value is a common source of confusion for newcomers to SQL, who often think that NULL is the same thing as an empty string ''. For example, the following statements are completely different: mysql> INSERT INTO my_table ...
https://dev.mysql.com/doc/refman/9.7/en/repair-table.html
[QUICK] [EXTENDED] [USE_FRM] REPAIR TABLE repairs a possibly corrupted table, for certain storage engines only. Although normally you should never have to run REPAIR TABLE, if disaster strikes, this statement is very likely to get back all your data ...
https://dev.mysql.com/doc/refman/9.7/en/replication-administration-skip.html
If replication stops due to an issue with an event in a replicated transaction, you can resume replication by skipping the failed transaction on the replica. Before skipping a transaction, ensure that the replication I/O (receiver) thread is ...
https://dev.mysql.com/doc/refman/9.7/en/show-create-table.html
SHOW CREATE TABLE tbl_name Shows the CREATE TABLE statement that creates the named table. To use this statement, you must have some privilege for the table. row *************************** Table: t Create Table: CREATE TABLE `t` ( `id` int NOT NULL ...
https://dev.mysql.com/doc/refman/9.7/en/sys-schema-object-index.html
The following tables list sys schema objects and provide a short description of each one.
https://dev.mysql.com/doc/refman/9.7/en/truncate-table.html
Logically, TRUNCATE TABLE is similar to a DELETE statement that deletes all rows, or a sequence of DROP TABLE and CREATE TABLE statements. To achieve high performance, TRUNCATE TABLE bypasses the DML method of deleting data. Thus, it does not cause ...