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https://dev.mysql.com/doc/refman/8.4/en/semijoins-antijoins.html
For an inner join between two tables, the join returns a row from one table as many times as there are matches in the other table. Assuming that class_num is a primary key in the class table, duplicate suppression is possible by using SELECT ... A ...
https://dev.mysql.com/doc/refman/8.4/en/sys-statement-performance-analyzer.html
statement_performance_analyzer.limit, @sys.statement_performance_analyzer.limit The maximum number of rows to return for views that have no built-in limit. mysql> CALL sys.statement_performance_analyzer('delta', 'mydb.tmp_digests_ini', ... Creates a ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-advisor-auto-query-time-estimation.html
row *************************** query_id: 14 LEFT(query_text,160): SELECT country from airport_geo *************************** 2. row *************************** query_id: 15 LEFT(query_text,160): CREATE TABLE flight_from_US SELECT * FROM flight ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-ml-score.html
Set a positive integer between 1 and the number of rows in the table. threshold: The threshold you set on anomaly detection models determines which rows in the output table are labeled as anomalies with an anomaly score of 1, or normal with an ...
https://dev.mysql.com/doc/refman/8.4/en/grant.html
For example: CREATE USER 'jeffrey'@'localhost' IDENTIFIED BY 'password'; GRANT ALL ON db1.* TO 'jeffrey'@'localhost'; GRANT SELECT ON db2.invoice TO 'jeffrey'@'localhost'; ALTER USER 'jeffrey'@'localhost' WITH MAX_QUERIES_PER_HOUR 90; From the mysql ...[WITH GRANT OPTION] [AS user [WITH ROLE DEFAULT | NONE | ALL | ALL EXCEPT role [, role ] ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-config-values.html
Each row in the table corresponds to the current value of a parameter on a given node. row *************************** Name: NodeId Node: 2 Type: unsigned Default: Minimum: 1 Maximum: 144 Required: Y Current: 2 *************************** 2. row ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-list.html
In MySQL 8.4, all rows relating to employees working at stores in that region can be deleted with the query ALTER TABLE employees TRUNCATE PARTITION pWest, which can be executed much more efficiently than the equivalent DELETE statement DELETE FROM ... List partitioning in MySQL is similar to range partitioning in many ...
https://dev.mysql.com/doc/refman/8.4/en/replication-formats.html
When using row-based logging, the source writes events to the binary log that indicate how individual table rows are changed. Replication of the source to the replica works by copying the events representing the changes to the table rows to the ...
https://dev.mysql.com/doc/refman/8.4/en/sys-table-exists.html
Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is returned. Parameters in_db VARCHAR(64): The name of the database in which to ...
https://dev.mysql.com/doc/refman/8.4/en/table.html
TABLE is a DML statement which returns rows and columns of the named table. Given the existence of a table named t, the following two statements produce identical output: TABLE t; SELECT * FROM t; You can order and limit the number of rows produced ...See Section 15.2.18, “UNION Clause”, Section 15.2.4, “EXCEPT Clause”, and Section 15.2.8, “INTERSECT Clause”, for more information and ...