Nilesh Patil's blog

These two collations are both for the UTF-8 character encoding. The differences are in how text is sorted and compared. Note: in new versions of MySQL use utf8mb4 , rather than utf8 , which is the same UTF-8 data format with same performance but previously only accepted the first 65,536 Unicode characters. Accuracy utf8mb4_unicode_ci is based on the Unicode standard for sorting and comparison, which sorts accurately in a very wide range of languages. utf8mb4_general_ci fails to implement all of the Unicode sorting rules, which will result in undesirable sorting in some situations, such as when using particular languages or characters. Performance utf8mb4_general_ci is faster at comparisons and sorting, because it takes a bunch of performance-related shortcuts. On modern servers, this performance boost will be all but negligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today's computers. utf8mb4_unicode_c

    How to show records in same order where IDs are put into the IN() clause?     1) SELECT id FROM table1 WHERE ... ORDER BY display_order , name 2) SELECT name , description , ... WHERE id IN ([ id ' s from first ])   The issue is that the second query does not return the results in the same order  that the IDs are put into the IN() clause.    Solution :-  SELECT name , description , ... FROM ... WHERE id IN ([ ids , any order ]) ORDER BY FIELD ( id , [ ids in order ])

Blob data used MySQL charset which is in my.ini default-character-set=latin1 Suppose I have a table with a BLOB field. The charset of the table is UTF-8. I connect to the DB and "SET CHARACTER SET utf8". Then I save binary data into the field. Then I retrieve the data, and it's not what I saved (corrupt). Because while retrieving data blob data used mysql default charset set. Ref : http://stackoverflow.com/questions/14734812/is-a-blob-converted-using-the-current-default-charset-in-mysql

http://dekarlab.de/wp/?p=5 Pentaho R Integration Plugin is used to execute R code direct from Pentaho Data Integration (PDI). R Script Plugin can be downloaded here:  Downloads Installation R script plugin can be installed by performing the following steps: 1) Copy the plugin folder (RScriptPlugin) into the folder of your PDI installation: data-integration\plugins\steps 2) Install R project from the site http://www.r-project.org/ 3) Install rJava package in R by executing: install.packages(“rJava”) 4) Copy JRI library rJava/jri/jri.dll (windows) or rJava/jri/libjri.so (linux) to: data-integration/libswt/{your operation system} 5) Specify location of R using R_HOME environment variable. (like: C:\R\R-3.0.2). 6) For windows, it is also needed to put in PATH variable the path to R.dll, for example: C:\R\R-3.0.2\bin\{your operation system} 7) The plugin can be found under Sripting Folder in Design Tab: Note: to check the installation press Help bu