Note: Error logs are stored as files and are not affected by the log_output parameter. If log_output =FILE, view database log files for your DB engine using the AWS Management Console. For more information about table-based MySQL logs, see Managing table-based MySQL logs. Note: Enabling table logging can affect the database performance for high throughput workload. If log_output =TABLE, run the following command to query the log tables: Select * from mysql.slow_log There is a momentary outage when you reboot a DB instance, and the instance status displays as rebooting. Note: The parameter group name changes and applies immediately, but parameter group isn't applied until you manually reboot the instance. From the Database options section, choose the DB parameter group that you want to associate with the DB instance. Most Recent Solution 3 Here you have to make one self join to get the maximum value Try this select Max (a.Column1) as Column1, Column2 from table a inner join table b on a.Column2b.Column2 group by Column2 hope this helps you thanks Posted 19-Sep-14 1:32am Animesh Datta Solution 1 See this thread.Choose the instance that you want to associate with the DB parameter group, and then choose Modify.Open the Amazon RDS console, and then choose Databases from the navigation pane.You can modify the parameter in a custom DB parameter group if Is Modifiable is set to true.Īssociate the instance with the DB parameter group MySQL Cluster Community Edition is available as a separate download. Note: You can't modify the parameter settings of a default DB parameter group. MySQL Community Edition is a freely downloadable version of the world's most popular open source database that is supported by an active community of open source developers and enthusiasts. Choose Edit parameters, and set the following parameters to these values: General_log = 1 (default value is 0 or no logging) Slow_query_log = 1 (default value is 0 or no logging) Long_query_time = 2 (to log queries that run longer than two seconds) log_output = FILE (writes both the general and the slow query logs to the file system, and allows viewing of logs from the Amazon RDS console) log_output =TABLE (writes both the general and the slow query logs to a table so you can view these logs with a SQL query).MS SQL: SELECT TOP 1 FROM tablename ORDER BY primaryidfield DESC MySQL: SELECT FROM tablename ORDER BY primaryidfield DESC LIMIT 0,1 More code articles Paul Silver. Choose Parameter group actions, and then choose Edit. One MySQL Database service for OLTP, OLAP, and MLwithout ETL Unmatched price performance 6. 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.Choose the parameter group that you want to modify.Enter a description in the Description field.Enter the name in the Group name field.From the Parameter group family drop-down list, choose a DB parameter group family.Open the Amazon RDS console, and then choose Parameter groups from the navigation pane.Note: If you receive errors when running AWS CLI commands, make sure that you’re using the most recent version of the AWS CLI. If you already have a custom DB parameter group associated with the RDS instance, then proceed with modifying the required parameters. Then, associate the parameter group with your MySQL instance. Resolutionįirst, if you don't have a customer DB parameter group associated with your MySQL instance, create a custom DB parameter group and modify the parameter. The following mysql query prints all the published wordpress posts with most recent one. 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. You can generate the slow query log and the general log. I run this website on wordpress powered by a mysql database. 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. The MySQL error log file is generated by default. Mtn.date_time_col > now() - INTERVAL 1 MONTHĪND mtn2.date_time_col > now() - INTERVAL 1 MONTHĪND mtn.You can monitor the MySQL error log, the slow query log, and the general log directly through the Amazon RDS console, Amazon RDS API, Amazon RDS AWS Command Line Interface (AWS CLI), or AWS SDKs. Checking the three main answers in some other use case shows that the most voted answer is also by far the fastest, swarm intelligence works here: # Answer 1:
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