6/15/2023 0 Comments Mysql mostrecent![]() SELECT id, MAX (signin) AS mostrecentsignin FROM tbl GROUP BY id To get the whole single record, perform an INNER JOIN against a subquery which returns only the MAX (signin) per id. One MySQL Database service for OLTP, OLAP, and MLwithout ETL Unmatched price performance 6. This will list the most recent signin for each id. The following will work in most databases including MySQL, PostgreSQL, and Oracle. 7 Answers Sorted by: 129 Use the aggregate MAX (signin) grouped by id. Using RDS proxy can also help to reduce the failover time as it can route the queries to the healthy DB instance, it also helps to balance the load across multiple DB instances. Second-order SQL injection these are possibly the most complex SQL. ![]() Additionally, Aurora has a feature called "Aurora Global Database" which allows you to create read-only replicas across multiple AWS regions which can further help to reduce the failover time.Ĭreating an Aurora replica can also help to reduce the failover time as it can take over as the primary DB instance in case of a failure. Aurora has a built-in, fault-tolerant storage system that can automatically detect and repair failures. Migrating to Amazon Aurora MySQL and creating an Aurora replica can reduce the failover time to less than 20 seconds. These options are correct because they address the requirement of reducing the failover time to less than 20 seconds. Use RDS Proxy in front of the database. Git clone git:///moodlehq/moodle-local_phpmyadmin.Migrate the database to Amazon Aurora MySQL. Use this link to initially install and/or open phpMyAdmin.įor more advanced users: To obtain the most recent version from git, go to the moodle/local/ folder and run Now go to your site admin block and you will see a new link: Server > Database. summarizes the corresponding operations for DB2, MySQL, Oracle. To remedy this, I can break the query into two parts: Find an appropriate comment ID that represents the earliest of the 'recent comments' - a 'cut-off' ID. These are often queries for the most recent or the best entries of a result set. You should end up with a folder there called 'phpmyadmin' which contains all the necessary files. The fundamental problem here is that my SQL query didn't have a good way to limit the cross-product between the tables as they were being calculated. XAMPP is a completely free, easy to install Apache distribution containing MariaDB, PHP, and Perl. To install phpMyAdmin so it is directly available via Moodle, unzip the archive from Modules and plugins database inside the moodle/local/ folder. XAMPP is the most popular PHP development environment. Install phpMyAdmin in Moodle 2.0 or later Note: many web hosting sites have phpMyAdmin already available via their control panel, you can use that to assist with the Moodle install.įor more advanced users: To obtain the most recent version from CVS, go to the moodle/admin/ folder and run Use this link to initially install and/or open phpMyAdmin.įor those that need phpMyAdmin to perform a Moodle install, unpack it in the documents directory (the same directory as your moodle folder, sometimes found in the folder htdocs) of your web server. You should end up with a folder there called 'mysql' which contains all the necessary files. ![]() To install phpMyAdmin so it is directly available via Moodle, unzip the archive from Modules and plugins database inside the moodle/admin/ folder. Install phpMyAdmin in Moodle 1.9.x or earlier This is a powerful program that should be used with care and be available only to trusted administrators. MySQL Subquery Exercises: Query to select last 10 records from a table - w3resource MySQL Subquery Exercises: Query to select last 10 records from a table Last update on Aug21:50:45 (UTC/GMT +8 hours) MySQL Subquery: Exercise-18 with Solution Write a query to select last 10 records from a table. Just replace tablename with the name of your table, and primaryidfield with the name of your primary ID field and it will give you the most recent record. It can be found in the site administration block>Server>database link. Restoring a MySQL service from a point in time. When installed as part of Moodle, it becomes part of the Moodle interface. will create a new database from the most recent snapshot created before April 1st 2020 13:00 UTC. PhpMyAdmin is a useful MySQL database administration tool (if you are using MySQL as the database for your Moodle).
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