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https://dev.mysql.com/doc/refman/9.7/en/delete.html
For MyISAM tables, you can specify an AUTO_INCREMENT secondary column in a multiple-column key. For the second multiple-table syntax, only matching rows from the tables listed in the FROM clause (before the USING clause) are deleted. DELETE is a ...
https://dev.mysql.com/doc/refman/9.7/en/encryption-functions.html
The second argument indicates the desired bit length of the result, which must have a value of 224, 256, 384, 512, or 0 (which is equivalent to 256). If you want to store these results, use a column with a VARBINARY or BLOB binary string data type.
https://dev.mysql.com/doc/refman/9.7/en/entering-queries.html
(Do you see the error in the statement? The string 'Smith is missing the second single quotation mark.) At this point, what do you do? The simplest thing is to cancel the query. Note Multiline statements from this point on are written without the ...
https://dev.mysql.com/doc/refman/9.7/en/except.html
query_expression_body EXCEPT [ALL | DISTINCT] query_expression_body [EXCEPT [ALL | DISTINCT] query_expression_body] [...] query_expression_body: See Section 15.2.14, “Set Operations with UNION, INTERSECT, and EXCEPT” EXCEPT limits the result ...
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 ...
https://dev.mysql.com/doc/refman/9.7/en/faqs-mysql-cluster.html
SCI is a high-speed (1 gigabit per second and higher), high-availability protocol used in building scalable multi-processor systems; it requires special hardware and drivers. In the following section, we answer questions that are frequently asked ...
https://dev.mysql.com/doc/refman/9.7/en/flush.html
This operation does not perform an implicit UNLOCK TABLES, so an error results if you perform the operation while there is any active LOCK TABLES or use it a second time without first releasing the locks acquired. | tables_option } flush_option: { ...
https://dev.mysql.com/doc/refman/9.7/en/fulltext-boolean.html
If the minimum word length is 4, a search for '+word +the*' could return fewer rows than a search for '+word +the', because the second query ignores the too-short search term the. MySQL can perform boolean full-text searches using the IN BOOLEAN ...
https://dev.mysql.com/doc/refman/9.7/en/fulltext-search.html
MATCH (col1,col2,...) AGAINST (expr [search_modifier]) search_modifier: { IN NATURAL LANGUAGE MODE | IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION | IN BOOLEAN MODE | WITH QUERY EXPANSION } MySQL has support for full-text indexing and searching: A ...
https://dev.mysql.com/doc/refman/9.7/en/function-optimization.html
The second query contains an expression that uses the nondeterministic function RAND(), which is not constant in the query but in fact has a new value for every row of table t. A function is nondeterministic if, given fixed values for its arguments, ...