These are the worlds most tedious queries....all r solved. If you solve these queries then u will become the master of sql...This shows examples of using joins, subqueries, functions etc etc....just look in...and do vote for me for my work.....thx....The table is all given...the queries are totally solved.....
These are about 150 queries..related to date..joins..etc etc...
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Thx friend for your feedback....There are 150 queries with 4 levels..u know if u get the queries then u can solve the most crucked queries ever (If this comment was disrespectful, please report it.)
Aaye this is the exactly same list of queries that I had studied 4 yrs back when I was learning Oracle & VB. And to your surprise I just opened up my files to find the same list of queries. :-)! great coincidence...
Its a very nice practice material. Do go thru it before you go for an interview (If this comment was disrespectful, please report it.)
Thanx somdutt for this toughtfull Idea! This stuff is worth 5 stars!
Thanx & keep up the good work! (If this comment was disrespectful, please report it.)
11/19/2002 3:43:37 PM:
Hi
Its a very good compilation of a variety of queries. However, please note that most of these queries ( particularly complex queries) should not be used as u have given for performance reasons. If u use NOT IN for negation, the query will take forever for 100,000 records. Always use Exist and Not exist for the same.
Good work.
(If this comment was disrespectful, please report it.)
to the person that said to use NOT EXISTS as opposed to NOT IN: wrong. They both have their place and the performance of both is -very- dependant on how the data is structured.
and I'm sorry, but saying these are the world's most difficult queries is well...rediculous. I can show you dozens of queries that are far more complicated. (If this comment was disrespectful, please report it.)
12/20/2004 5:00:01 PM:
I can appreciate your enthusiasm, but there seems to be a lot more involved in becoming a master (first rule of being a master - don't call yourself one.), but in any case, sql also involves user administration, stored procs, error handling, table alterations, log handling, data cleansing, application interfaces, shells, and much much more. (If this comment was disrespectful, please report it.)
2/4/2005 7:20:32 AM:
MOST OF THE QUERIES UNDER LEVEL 3 ARE SOLVED IN WRONG MANNER. ALSO ALL THOSE QUERIES ARE ALREADY AVAILABLE AT ANATHER SITE. (If this comment was disrespectful, please report it.)
The queries i made along time back. Yes these are complicated queries in intermediate level. (IF YOU WANT TO PLACE MORE COMPLEX QUERIES THEN POST IT IN ADVANCE LEVEL...)..... that's why i haven't placed the above stuffs in advance level.!!!!!...i told before!!. the queries may be solved in wrong manner! (If this comment was disrespectful, please report it.)
Nice work Ganguly, Though there are several alternate methods and ways... and as there are several methods to approach a problem.. the readers may have different ideas.. In general it was very good work and expecting more from you.. Keep it up.. Thanks.. (If this comment was disrespectful, please report it.)
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4/18/2002 9:02:25 AM: 
