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https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html
The following query selects all rows with a date_col value from within the last 30 days: mysql> SELECT something FROM tbl_name -> WHERE DATE_SUB(CURDATE(),INTERVAL 30 DAY) <= date_col; The query also selects rows with dates that lie in the future.
https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html
mysql> SELECT EXP(2); -> 7.3890560989307 mysql> SELECT EXP(-2); -> 0.13533528323661 mysql> SELECT EXP(0); -> 1 FLOOR(X) Returns the largest integer value not greater than X. Use of a column with RAND() values in an ORDER BY or GROUP BY clause may ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-quick-start.html
row *************************** ENGINE: PERFORMANCE_SCHEMA SUPPORT: YES COMMENT: Performance Schema TRANSACTIONS: NO XA: NO SAVEPOINTS: NO mysql> SHOW ENGINES\G ... row *************************** Table: setup_consumers Create Table: CREATE TABLE ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tls-channel-status-table.html
The tls_channel_status table has these columns: CHANNEL The name of the connection interface to which the TLS property row applies. The row for the Enabled property indicates overall interface status, where the interface and its status are named in ... Connection interface TLS properties are set at server startup, and can be updated at runtime using the ALTER INSTANCE RELOAD TLS ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-wait-summary-tables.html
row *************************** EVENT_NAME: wait/synch/mutex/sql/BINARY_LOG::LOCK_index COUNT_STAR: 8 SUM_TIMER_WAIT: 2119302 MIN_TIMER_WAIT: 196092 AVG_TIMER_WAIT: 264912 MAX_TIMER_WAIT: 569421 ... row *************************** EVENT_NAME: ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/replication-privilege-checks-account.html
The use of row-based binary logging (binlog_format=ROW) is strongly recommended for replication channels that are secured using a PRIVILEGE_CHECKS_USER account. From MySQL 8.0.19, the REQUIRE_ROW_FORMAT setting can be applied to secured channels, ...
https://dev.mysql.com/doc/refman/8.0/en/create-trigger.html
CREATE [DEFINER = user] TRIGGER [IF NOT EXISTS] trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body trigger_time: { BEFORE | AFTER } trigger_event: { INSERT | UPDATE | DELETE } trigger_order: { FOLLOWS | ...
https://dev.mysql.com/doc/refman/8.0/en/explain-extended.html
row *************************** id: 1 select_type: PRIMARY table: t1 type: index possible_keys: NULL key: PRIMARY key_len: 4 ref: NULL rows: 4 filtered: 100.00 Extra: Using index *************************** 2. row *************************** id: 2 ... The EXPLAIN statement produces extra (“extended”) information that is not part of EXPLAIN output but can be viewed by issuing a SHOW WARNINGS statement following ...
https://dev.mysql.com/doc/refman/8.0/en/join.html
The effect of this option is that rows are selected only from the listed partitions or subpartitions. INNER JOIN and , (comma) are semantically equivalent in the absence of a join condition: both produce a Cartesian product between the specified ...