Posts
Ontology Linked Data
The following is a Assignment on Ontology and Linked Data and the evolution of data which lead to the use of ontology in web. Thanks to my teammates Bharath Gowda and Sravani Thota for working on the same. Ontology And Linked Data An ontology for …
Important MySQL DBA Interview Questions
Here are a few sets of interview questions expected for MySQL DBA position.These are compilation of the usual questions from various DBA texts: What is Log Switch? – The point at which ORACLE ends writing to one online redo log file and begins writin …
Installing Django on Dreamhost
Installing Django in Dreamhost and getting it to run wasn’t straight forward at-least to me. There was lot of issues such as python bin directory not accessible as its shared and so. So the initial step in this to setup python yourself so that you can …
Get the nth Word from a text field in mysql
I had a requirement to get the nth word out of a string and sort or order by the same. This is used when the text is stored in a purticular format and you would want to order it according to that or group it or so on. So how is it done? We do it us …
Display row number in Mysql Select Query
How many times did want to have the row number or the position of the row in the selected query? I had many cases where I needed this feature. I needed the feature for printing the rank of a person where each row is the mark of the person. So lets see how …
Customizing Mysql Prompt For multiple Servers
If you are using mysql regularly on multiple servers its really useful to have the promt in mysql to show something more than mysql>. It would be useful if it showed the username,hostname, current database and things like that. So how to do this. …
Generate Date from a range in Mysql and pad the results where no date is present
If you want to generate dates, MYSQL doesn’t have a range function, so I wrote a work around for the same. So how it works is I have reused a code to generate numbers from my previous post. So I added date function to that query and reduce the generated …
Generate 1 to 1000 in mysql
Sometimes its necessary to have thousand rows to join or generate new values, we need to get the thousand rows first. For this I used union of numbers 0-9. I have joined four of these to get to four digit values. So here is the code: [sql]SELECT @ro …
Recent Comments