MySQL 5 Production Release

MySQL has offically released Version 5 (5.0.15).

Just installed over the RC (5.0.13) and restarted had my development machine working fine, however now I need to more closely investigate 2 complicated queries with Outer Joins that no longer work between 4 and 5, and 2 update queries that have crashed my 5.0.13 install.

The following steps were used to upgrade from 4 to 5.0.13

MYSQL=mysql-standard-5.0.13-rc-linux-i686
cp $MYSQL.tar.gz /opt
cd /opt
tar xvfz $MYSQL.tar.gz
/etc/rc.d/init.d/mysql stop
ps -ef | grep mysql
rm -f mysql
ln -s $MYSQL mysql
cp -r $OLD/data/ mysql

du mysql/data

chown -R root /opt/mysql
chown -R mysql /opt/mysql/data
chgrp -R mysql /opt/mysql
chown -R root /opt/mysql/bin
/etc/rc.d/init.d/mysql start
ps -ef | grep mysql

/opt/mysql/bin/mysql_fix_privilege_tables –basedir=/opt/mysql –password=**

mysql -uroot -p mysql
show tables;

Tagged with: MySQL

Producing IQR and Outlier statistics with SQL

Producing IQR and Outlier statistics with SQL

The interquartile range (IQR) measures the spread of the middle 50% of a distribution — the distance between the first quartile (Q1) and the third quartile (Q3). Combined with Tukey’s 1.

Producing Mode statistics with SQL

Producing Mode statistics with SQL

The mode is the value or values that appear most frequently in a dataset. Unlike the mean or median, it applies naturally to categorical and ordinal data — star ratings, product codes, survey responses — and reveals what is most common, not what is average.

Extending MySQL Capabilies with UDFs, Plugins and Components - Part 2

Extending MySQL Capabilies with UDFs, Plugins and Components - Part 2

MySQL offers three different approaches to extending the SQL capabilities with the default product you download and install. These are: User Defined Function (UDF) MySQL Manual MySQL Plugin MySQL Manual MySQL Component MySQL Manual In my prior post I provided a new uuidv function that accepted a numeric argument to return a string of the version of UUID specified.