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https://dev.mysql.com/doc/refman/8.0/en/declare.html
The DECLARE statement is used to define various items local to a program: Local variables. END compound statement and must be at its start, before any other statements. Variable and condition declarations must appear before cursor or handler ...
https://dev.mysql.com/doc/refman/8.0/en/encrypted-connections.html
Encryption algorithms must include security elements to resist many kinds of known attacks such as changing the order of encrypted messages or replaying data twice. With an unencrypted connection between the MySQL client and the server, someone ...
https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html
Note If you are using a KDF, you must specify an initialization vector or a null string for this argument, in order to access the later arguments to define the KDF. If you want to store these results, use a column with a VARBINARY or BLOB binary ...
https://dev.mysql.com/doc/refman/8.0/en/example-maximum-column-group.html
SELECT article, MAX(price) AS price FROM shop GROUP BY article ORDER BY article; +---------+-------+ | article | price | +---------+-------+ | 0001 | 3.99 | | 0002 | 10.99 | | 0003 | 1.69 | | 0004 | 19.95 | +---------+-------+ .
https://dev.mysql.com/doc/refman/8.0/en/example-maximum-row.html
Task: Find the number, dealer, and price of the most expensive article.
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/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/8.0/en/faqs-storage-engines.html
In order to support partitioning of a given table, the storage engine used for the table must now provide its own (“native”) partitioning handler. Where can I obtain complete documentation for MySQL storage engines? A.2.2. Can I prevent the use ...
https://dev.mysql.com/doc/refman/8.0/en/features.html
For example: mysql> SELECT CONCAT(first_name, ' ', last_name) -> FROM citizen -> WHERE income/dependents > 10000 AND age > 30; Full support for SQL GROUP BY and ORDER BY clauses. This section describes some of the important characteristics of the ...
https://dev.mysql.com/doc/refman/8.0/en/flow-control-functions.html
mysql> SELECT IFNULL(1,0); -> 1 mysql> SELECT IFNULL(NULL,10); -> 10 mysql> SELECT IFNULL(1/0,10); -> 10 mysql> SELECT IFNULL(1/0,'yes'); -> 'yes' The default return type of IFNULL(expr1,expr2) is the more “general” of the two expressions, in ...