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https://dev.mysql.com/doc/refman/5.7/en/while.html
Example: CREATE PROCEDURE dowhile() BEGIN DECLARE v1 INT DEFAULT 5; WHILE v1 > 0 DO ... [begin_label:] WHILE search_condition DO statement_list END WHILE [end_label] The statement list within a WHILE statement is repeated as long as the ...
https://dev.mysql.com/doc/refman/5.7/en/zlib-decompress.html
The zlib_decompress utility decompresses mysqlpump output that was created using ZLIB compression. Invoke zlib_decompress like this: zlib_decompress input_file output_file Example: mysqlpump --compress-output=ZLIB > dump.zlib zlib_decompress ...
https://dev.mysql.com/doc/refman/5.7/en/all-subqueries.html
The expression is TRUE if table t2 contains (-5,0,+5) because 10 is greater than all three values in t2. The expression is FALSE if table t2 contains (12,6,NULL,-100) because there is a single value 12 in table t2 that is greater than 10. The ...
https://dev.mysql.com/doc/refman/5.7/en/analyze-table.html
This makes ANALYZE TABLE fast on InnoDB tables but not 100% accurate because it does not take all rows into account. ANALYZE TABLE performs a key distribution analysis and stores the distribution for the named table or tables. For MyISAM tables, ...
https://dev.mysql.com/doc/refman/5.7/en/date-and-time-type-conversion.html
Conversion of DATETIME and TIMESTAMP values: Conversion to a DATE value takes fractional seconds into account and rounds the time part. To some extent, you can convert a value from one temporal type to another. However, there may be some alteration ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-tuning-recovery.html
mysql> SET GLOBAL group_replication_recovery_retry_count= 10; Note that this accounts for the global number of attempts that the server joining the group makes connecting to each one of the suitable donors. Whenever a new member joins a replication ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-connection-control-table-reference.html
Table 24.9 INFORMATION_SCHEMA Connection Control Tables Table Name Description Introduced CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS Current number of consecutive failed connection attempts per account 5.7.17 .
https://dev.mysql.com/doc/refman/5.7/en/json-modification-functions.html
The functions in this section modify JSON values and return the result. JSON_APPEND(json_doc, path, val[, path, val] ...) Appends values to the end of the indicated arrays within a JSON document and returns the result. This function was renamed to ...
https://dev.mysql.com/doc/refman/5.7/en/keyring-encrypted-file-plugin.html
Note The keyring_encrypted_file plugin is an extension included in MySQL Enterprise Edition, a commercial product. The keyring_encrypted_file keyring plugin stores keyring data in an encrypted, password-protected file local to the server host.
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-importing-data.html
It is common when setting up a new instance of NDB Cluster to need to import data from an existing NDB Cluster, instance of MySQL, or other source. This data is most often available in one or more of the following formats: An SQL dump file such as ...