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Let's learn SQL

Blogs > Sky
Post a Reply
Sky
Profile Blog Joined July 2004
Jordan812 Posts
Last Edited: 2011-01-21 01:44:01
January 21 2011 01:41 GMT
#1
Hello there,

Want to surprise some randoms with your sexy database skills? Well if so, you need to learn them first and luckily a website is offering free lessons on...

S Q L


Known as the Structured Query Language.

The website offering this free guide through learning the language is DB2 University. It seems as though there aren't too many subjects, but it's still in beta and appears to be going towards the direction of Khan Academy in terms of interactive exercises and lectures.

The site is somewhat approachable, though not entirely clean in presentation.

http://www.youtube.com/watch?v=W75_5iRVS5s


SQL might not be your thing, but you might want to keep the site bookmarked in case they happen to acquire a subject that you are actually interested in.

+ Show Spoiler +
[image loading]


Later.






...jumping into cold water whenever I get the chance.
Qzy
Profile Blog Joined July 2010
Denmark1121 Posts
Last Edited: 2011-01-21 01:45:09
January 21 2011 01:44 GMT
#2
Next thing to learn: http://en.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.
TG Sambo... Intel classic! Life of lively to live to life of full life thx to shield battery
Cambium
Profile Blog Joined June 2004
United States16368 Posts
January 21 2011 01:44 GMT
#3
SQL is pretty useful, but in order to be efficient with it (there are many many ways of doing one thing), I suggest taking a DB course and understand how DBMS process queries and their associated costs.
When you want something, all the universe conspires in helping you to achieve it.
Sky
Profile Blog Joined July 2004
Jordan812 Posts
Last Edited: 2011-01-21 01:57:29
January 21 2011 01:50 GMT
#4
On January 21 2011 10:44 Qzy wrote:
Next thing to learn: http://da.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.


Yes, I would imagine that being the inevitable path.

By looking at a certain twitter account: X
Looks as though SQL is easy to exploit.
...jumping into cold water whenever I get the chance.
ShoCkeyy
Profile Blog Joined July 2008
7815 Posts
Last Edited: 2011-01-21 01:54:19
January 21 2011 01:53 GMT
#5
SELECT * FROM TEAM_LIQUID WHERE name = "ShoCkeyy"

D:

Meh, I'm pretty scrubby at SQL, but love it programming.
Life?
Qzy
Profile Blog Joined July 2010
Denmark1121 Posts
January 21 2011 01:54 GMT
#6
On January 21 2011 10:50 Sky wrote:
Show nested quote +
On January 21 2011 10:44 Qzy wrote:
Next thing to learn: http://en.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.


Yes, http://en.wikipedia.org/wiki/SQL_injection. An english version of the same page. Would imagine that being the inevitable path.

By looking at a certain twitter account: X
Looks as though SQL is easy to exploit.


Yeah I changed the link before your edit . :p
TG Sambo... Intel classic! Life of lively to live to life of full life thx to shield battery
Incanus
Profile Joined October 2009
Canada695 Posts
Last Edited: 2011-01-21 02:16:04
January 21 2011 02:13 GMT
#7
On January 21 2011 10:50 Sky wrote:
Show nested quote +
On January 21 2011 10:44 Qzy wrote:
Next thing to learn: http://da.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.


Yes, I would imagine that being the inevitable path.

By looking at a certain twitter account: X
Looks as though SQL is easy to exploit.

SQL isn't "easy to exploit", but terribly written programs are. And, it's amazing how many programs which connect to SQL databases are badly written. Anyone writing a web application should be seriously weighing the security of their application at every step.
Flash: "Why am I so good?" *sob sob*
sur_reaL
Profile Joined April 2010
Canada278 Posts
January 21 2011 02:19 GMT
#8
On January 21 2011 10:44 Qzy wrote:
Next thing to learn: http://en.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.


haha...it reminds of this http://xkcd.com/327/
http://www.youtube.com/watch?v=lH3hrtp1T84
endy
Profile Blog Joined May 2009
Switzerland8970 Posts
January 21 2011 02:56 GMT
#9
SQL is very easy to learn. The most important thing is to learn how to optimize your queries. That means you'll need to understand exactly how the database engine will process these.

Another thing is that you need to be aware that even if the "S" in SQL stands for "standard", SQL is far from being standard. It's different on every RDBMS, except for the SELECT FROM WHERE clauses. Most functions like string manipulation functions will be different, the way of using stored procedures will be different, and procedural extension will be different.
ॐ
Azzur
Profile Blog Joined July 2010
Australia6260 Posts
January 21 2011 03:01 GMT
#10
On January 21 2011 11:19 sur_reaL wrote:
Show nested quote +
On January 21 2011 10:44 Qzy wrote:
Next thing to learn: http://en.wikipedia.org/wiki/SQL_injection

Hack SEHR planet! You too can be leet.


haha...it reminds of this http://xkcd.com/327/

ROFFLLLL!!!

For programmers, SQL is a very important skill to learn. This is because a lot of the applications that you'll be working on a are database based.
AcrossFiveJulys
Profile Blog Joined September 2005
United States3612 Posts
January 21 2011 04:09 GMT
#11
You don't really learn SQL, you just use it. It's so simple. As endy said the only nontrivial thing about it is understanding how the queries are processed for the purpose of optimization.
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