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https://dev.mysql.com/doc/refman/8.0/en/drop-tablespace.html
The UNDO keyword, introduced in MySQL 8.0.14, must be specified to drop an undo tablespace. Similar to the system tablespace, truncating or dropping tables stored in a general tablespace creates free space internally in the general tablespace .ibd ... DROP [UNDO] TABLESPACE tablespace_name [ENGINE [=] engine_name] This statement drops a tablespace that was previously created using CREATE ...
https://dev.mysql.com/doc/refman/8.0/en/example-auto-increment.html
For example: INSERT INTO animals (id,name) VALUES(0,'groundhog'); If the column is declared NOT NULL, it is also possible to assign NULL to the column to generate sequence numbers. For example: INSERT INTO animals (id,name) VALUES(NULL,'squirrel'); ...You can also explicitly assign 0 to the column to generate sequence numbers, unless the NO_AUTO_VALUE_ON_ZERO SQL mode is ...
https://dev.mysql.com/doc/refman/8.0/en/example-storage-engine.html
mysql> CREATE TABLE test (i INT) ENGINE = EXAMPLE; Query OK, 0 rows affected (0.78 sec) mysql> INSERT INTO test VALUES(1),(2),(3); ERROR 1031 (HY000): Table storage engine for 'test' doesn't » have this option mysql> SELECT * FROM test; Empty set ... The EXAMPLE storage engine is a stub engine that does ...
https://dev.mysql.com/doc/refman/8.0/en/examples.html
Here are examples of how to solve some common problems with MySQL. Some of the examples use the table shop to hold the price of each article (item number) for certain traders (dealers). Supposing that each trader has a single fixed price per ...
https://dev.mysql.com/doc/refman/8.0/en/extensions-to-ansi.html
The KEY_BLOCK_SIZE clause in the following comment is executed only by servers from MySQL 5.1.10 or higher: CREATE TABLE t1(a INT, KEY (a)) /*!50110 KEY_BLOCK_SIZE=1024 */; The following descriptions list MySQL extensions, organized by category. If ... MySQL Server supports some extensions that you are not likely to find in other SQL ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-boolean.html
The full-text engine splits the phrase into words and performs a search in the FULLTEXT index for the words. '+apple macintosh' Find rows that contain the word “apple”, but rank rows higher if they also contain “macintosh”. '+apple ... MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-natural-language.html
Note The term “document” may be used interchangeably with the term “row”, and both terms refer to the indexed part of the row. The full-text engine splits the phrase into words and performs a search in the FULLTEXT index for the words. If ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/function-optimization.html
This UPDATE statement uses a nondeterministic function to select rows to be modified: UPDATE t SET col_a = some_expr WHERE id = FLOOR(1 + RAND() * 49); Presumably the intent is to update at most a single row for which the primary key matches the ...
https://dev.mysql.com/doc/refman/8.0/en/grant.html
Issuing multiple GRANT statements containing wildcards may not have the expected effect on DML statements; when resolving grants involving wildcards, MySQL takes only the first matching grant into consideration. Enabling partial_revokes causes MySQL ...[WITH GRANT OPTION] [AS user [WITH ROLE DEFAULT | NONE | ALL | ALL EXCEPT role [, role ] ...