Let’s look at all the ways to change MySQL password, for root and other users:

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AWK is an extremely versatile and powerful language for processing files and text data. Often you can use awk to perform complex tasks on Unix / Linux / Mac OS command line which would otherwise take a full-fledged programming effort. AWK is great for log processing, creating custom scripts which will then be executed and more. For example I wanted to create a backup of all of my MySQL databases, each to a separate file after compressing them with gzip (maximum compression). I already created a list of databases on my MySQL server is a file named databases (how original!). Here is the awk script which processes the file and creates another file (named database_backup) which contains commands to backup all the databases as specified above.
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Here is a simple command to auto repair, check and optimize all the tables in all databases running on a MySQL server:

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I am serious. While MySQL is a great open source database, I have full respect to Sun’s plan to provide high-end features for paying customers only. After all they are in the business of making money and not philanthropy, last I checked.

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TechCrunch got it from a source that Google plans to launch their BigTable, their proprietary internal database which is used for Google Search, as a web service to compete with Amazon SimpleDB Web Service.

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To delete duplicates from a MySQL database table I normally copy the duplicate data first to a temporary table and then use the copied id’s to delete from the original table.

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In MySQL you can use the GRANT statement to create users and assign privileges to them at the same time. It is extremely convenient and beats create user or directly hacking the mysql.user table. I learned few things about GRANT the hard way.

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Replicating on two or more MySQL master database servers

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Monitoring MySQL queries is a favorite pastime of MySQL administrators especially for performance reasons. Here is a simple bash script to monitor long running MySQL queries in realtime using the ubiquitous ’show processlist’. The best part about this script is that you can use it to log your queries over time for later evaluation.
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When you try MySQL master-master replication with two (or more) servers you may often find that in the process of configuring the original master to also act as a slave server (start slave), it fails with the following error:

mysql> start slave;
ERROR 1200 (HY000): The server is not configured as slave; fix in config file or with CHANGE MASTER TO

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