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  • Users: vongrunt
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  1. vongrunt

    SQL Puzzle #16: nested set model

    Here comes long post. Actually it will take no more than 15 minutes of your time. Overview Suppose we have hierarchical data of some kind - structure of employees, genealogy tree, CMS structure, whatever: A --- B --- C --- D --- E --- F --- G --- H --- I...
  2. vongrunt

    SQL Puzzle #15: Continuity

    Suppose there are chronologically sorted records in a table: create table sampleData( dateVal smalldatetime primary key, someColumn varchar(32) ) insert into sampleData (dateVal) select '19990218' union all select '19990301' union all select '19990302' union all select '19990307' union all...
  3. vongrunt

    SQL Puzzle 14: Puzzle Lite #2 on 'roids

    Take data from SQL Puzzle Lite #2 (see thread183-1197121). Make result set containing 48 rows and three columns: N (tinyint), State and Capital 1st row (N=2): state/capital closest to two other capitals 2nd row (N=3): state/capital closest to three other capitals ... repeat until N=49...
  4. vongrunt

    SQL Puzzle 12b: Tokenization

    There are two tables: create table TestStrings( PK int primary key, string varchar(255) null ) insert into TestStrings values (1, 'Even a broken clock is right two times a day....on accident.') insert into TestStrings values (2, NULL ) insert into TestStrings values (3, 'Why did the...
  5. vongrunt

    SQL Puzzle 0x0A: ordinal position

    Take a look at this: use northwind select top 10 CustomerID, CompanyName, ContactName, Address from Customers where CustomerID >= 'B' order by ContactName Ordered set domesticus vulgaris, nothing unusual: CustomerID CompanyName ContactName Address...
  6. vongrunt

    SQL Puzzle #... 8?: Median values

    Overview We all probably know wtf is median value, but anyway... Imagine any ordered set of values, like this one: 1 3 7 8 17 23 42 Median represents "middle" value in set, or in above case 4th element - 8. For even count of elements median becomes mean (average) of two middle values. So if...
  7. vongrunt

    SQL Server Puzzle #3: aggregate product

    Prob... puzzle #3. Short description Write query that calculates product per group. Long description (sample data included) Product of all values in a group = something like SUM but with * instead of +. Lemme illustrate that with sample data: create table myTable ( groupID varchar(16)...
  8. vongrunt

    SQL Server Problem #2: data dump

    Awright. Puz... problem #2. Nothing with dates :P Every once in a while someone asks about SQL data dumping tool. Not DTS or bcp out/in (...damnit). Something like mysqldump -d, capable of generating buncha INSERT statements for each table we specify. Such tool would be quite handy in some...
  9. vongrunt

    New FAQ...

    Last few week we had some interesting threads about random numbers & stuff. And I had two hours free (... server is still crunching monthly batches). So... faq183-6047 Comments, suggestions and constructive critics are welcomed as usual. ------ "There's a man... He's bald and wears a...
  10. vongrunt

    Yet another date FAQ

    Just written... probably not finished: faq183-5842 Comments, suggestions, spelling checker outputs and kitchen sinks welcomed [smile]. ------ heisenbug: A bug that disappears or alters its behavior when one attempts to probe or isolate it schroedinbug: A bug that doesn't appear until someone...
  11. vongrunt

    Scripting.Dictionary weirdo

    Can anyone explain this to me: Dim oDict: Set oDict = Server.createObject("Scripting.Dictionary") Response.Write "Initial length: " & oDict.count & "<br>" Response.Write oDict.Item("blah") Response.Write "Length after: " & oDict.count & "<br>" Response.Write oDict.exists("blah") & " " &...
  12. vongrunt

    Yet another javascript function?

    This probably doesn't belong to useful tips, so here comes a question: what does the following function? <script language="javascript"> function blah() { with( arguments.length? arguments[0]: document.body) for (var i=0; i< childNodes.length; i++) with(obj = childNodes[i]) nodeType==3...
  13. vongrunt

    SELECT... LIMIT?

    Here comes a question: how to SELECT N records starting from position X? For example: gimme records between 91 and 100. I'd like to "skip" first X records from pure SQL, not using ADO & stuff. Postgres and mySQL can do it. Oracle and DB/2 can do it w/ simple tricks (ROWNUM/OLAP functions)...
  14. vongrunt

    Remote scripting lite

    Take a look at the following code (crippled, hard-coded, IE 5.5+ only ): <HTML XMLNS:MSIE ><MSIE:DOWNLOAD ID="oDL" STYLE="behavior:url(#default#download)" /> <form> <input type="text" name="zip" onchange="remotecall();"> <span id="zip_name" style="width: 200px; background-color...

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