Archive for the ‘Lessons Learned’ Category

Pwn3d.

My main machine at home has been completely owned by spyware. I feel like such a moron for letting it happen, but what’s done is done. After fighting it on every front imaginable (yes, I tried that; and that too… yeah yeah, and all of those!) and calling in my paternal IT support; all to no avail, I backed up what little data was on my Apps drive (seperate HDDs for data and apps is a Good Thing!) and whiped it clean.

Now the fun part — installing Ubuntu, the plethora of applications I need and XPpro under VMWare server. Hopefully VMWare server will give enough juice to XP to run Photoshop, as that’s the only reason I need Windows these days. It’s at this point that I’m oh-so-happy I chose Internode as my ISP; their Ubuntu mirror server allows me to apt-get install everything I need at lightning pace without affecting my bandwidth quota.

Windows will never again have access to my master boot record. Move on Windows, you’re no longer welcome here.

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Find Duplicate Rows in Database Table

This little chunk of SQL saved my ass today after I found out that most of the 223 students who had been automatically enrolled in an Activity Management system I just deployed were actually enrolled twice because the student list provided by another system was corrupt:

SELECT * FROM table_name WHERE field_name NOT IN (SELECT DISTINCT(field_name) FROM table_name)

Ideally the field in question would be UNIQUE, but in this scenario that is not the case because the field was a student number and this system supports multiple courses — meaning a single student number is allowed to exist multiple times so long as each instance is tied to a different course. New constraints and checks have been put in place to ensure this can’t happen again, but regardless; lesson learned 😉