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• Are there disadvantages to using VARCHAR(MAX) in a table?

  - by Meiscooldude

  Here is my predicament. Basically, I need a column in a table to hold up an unknown length of characters. But I was curious if in Sql Server performance problems could arise using a VARCHAR(MAX) or NVARCHAR(MAX) in a column, such as: 'This time' I only need to store 3 characters and most of the time I only need to store 10 characters. But there is…

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• How to select a MAX value from column in Query Builder in Kohana framework?

  - by Victor Czechov

  I need to INSERT a data to table, but before a query I must to know the MAX value from column position, than to INSERT a data WHERE my SELECTED before position+1. Is it possible with query builder? following my first comment I did query: $p = DB::select(array(DB::expr('MAX(`position`)', 'p')))->from('supercategories')->execute(); echo $p;…

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• Getting Out Of Memory: Java heap space, but while viewing heap space it max uses 50 MB

  - by ikky

  Hi! I'm using ASANT to run a xml file which points to a NARS.jar file. (i do not have the project file of the NARS.jar) I'm getting "java.lang.OutOfMemoryError: Java heap space. I used VisualVM to look at the heap while running the NARS.jar, and it says that it max uses 50 MB of the heapspace. I've set the initial and max size of heapspace to…

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• Tomcat 5.5, Is there a max upload speed per request?

  - by maclema

  I am having an issue when uploading files to tomcat. It seems that tomcat (or something else?) will not handle the upload as fast as I can send it. When uploading multiple files concurrently I can max out my local connection upload speed (2.1MB/s). However, when uploading only one file at a time, no matter how small or large the file, the…

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• How to select min and max values of a column in a datatable?

  - by Ahmed

  For the following datatable column, what is the fastest way to get the min and max values? AccountLevel 0 1 2 3

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• Is a nvarchar(max) less performant than a nvarchar(100) for instance?

  - by Lieven Cardoen

  Is a nvarchar(max) less performant than a nvarchar(100) for instance?

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• Is there a function similar to Math.Max for Entity Framework?

  - by Ryan ONeill

  I have an entity framework query as follows; From T In Db.MyTable Where (T.Col1 - T.Col2) + T.Col3 - T.Col4 > 0 _ Select T I now need to make sure that the bracketed part '(T.Col1 - T.Col2)' does not go below zero. In .Net, I'd code it as follows (but obviously EF does not like Math.Max). From T In Db.MyTable Where Math.Max(T.Col1…

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• PS: Filter selected rows with only max values as output?

  - by David.Chu.ca

  I have a variable results ($result) of several rows of data or object like this: PS> $result | ft -auto; name value ---- ----- a 1 a 2 b 30 b 20 .... what I need to get all the rows of name and max(value) like this filtered output: PS> $result | ? |ft -auto name value ---- ----- a …

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• Why do I have to set the max length of every damn text column in the database?

  - by John Leidegren

  Why is it that every RDBMS insists that you tell it what the max length of a text field is going to be... why can't it just infer this information form the data that's put into the database? I've mostly worked with MS SQL Server, but every other database I know also demands that you set these arbitrary limits on your data schema. The…

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• Windows 7 cannot burn a DVD-R at 4x or 8x? (it seems to have to use the MAX speed)

  - by Jian Lin

  Windows 7 is great to have the ability to burn an .iso into a DVD-R, but it seems like there is no way to change the speed to 8x or 4x? (so it may go "max", which is 16x) because some of my DVD drives cannot read data all the time if the disc was burned at 16x, that's why usually i limit it to 8x. also, some articles say that disc…

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• Why such a dramatic difference in wireless router max. simultaneous connections?

  - by Jez

  Recently, I've needed to look into buying a wireless router for a mission-critical system at work that will need to support quite a few simultaneous connections (potentially a few hundred laptops). One thing I've noticed is that there seems to be a dramatic difference between the max. simultaneous connections different routers can…

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• SQL SERVER – Online Index Rebuilding Index Improvement in SQL Server 2012

  - by pinaldave

  Have you ever faced situation when you see something working and you feel it should not be working? Well, I had similar moments few days ago. I know that SQL Server 2008 supports online indexing. However, I also know that I cannot rebuild index ONLINE if I have used VARCHAR(MAX), NVARCHAR(MAX) or few other data types. While I held…

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• How do you set max execution time of PHP's CLI component?

  - by cwd

  How do you set max execution time of PHP's CLI component? I have a CLI script that has gone into a infinite loop and I'm not sure how to kill it without restarting. I used quicksilver to launch it, so I can't press control+c at the command line. I tried running ps -A (show all processes) but php is not showing up in that list, so…

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• A tale from a Stalker

  - by Peter Larsson

  Today I thought I should write something about a stalker I've got. Don't get me wrong, I have way more fans than stalkers, but this stalker is particular persistent towards me. It all started when I wrote about Relational Division with Sets late last…

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• Java Runtime.freeMemory() returning bizarre results when adding more objects

  - by Sotirios Delimanolis

  For whatever reason, I wanted to see how many objects I could create and populate a LinkedList with. I used Runtime.getRuntime().freeMemory() to get the approximation of free memory in my JVM. I wrote this: public static void main(String[] arg) { …

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• OpenCv Error ( unhandeld exeption) after execute

  - by hamza

  Hi , i m using VS2010 i m trting to make a gray image more bright , the code did compile normaly but no change in the seconde picture , and an error message ( undhadled exeception .. .. ) showed up after that the execute is done showed up here is a…

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• Linux AMD-FX 8350 temperature monitoring

  - by HyperDevil

  I’m trying to get the CPU temperature for my AMD-FX8350 on Debian Squeeze. I ran sensors-detect and then sensors, but I only get my motherboard sensors (it8720-isa-0228). There are three temperature values there but I assume those are not for the…

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• How can I test that my hash function is good in terms of max-load?

  - by philcolbourn

  I have read through various papers on the 'Balls and Bins' problem and it seems that if a hash function is working right (ie. it is effectively a random distribution) then the following should/must be true if I hash n values into a hash table…

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• Exclude specific value from a Min/Max agregate funcion using ICriteria.

  - by sparks

  I have a schedule (Voyages) table like this: ID Arrival Departure OrderIndex 1 01/01/1753 02/10/2009 0 1 02/11/2009 02/15/2009 1 1 02/16/2009 02/19/2009 2 1 02/21/2009 …

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• Mobile detection - Meta tag and max-device-width vs. php user agent?

  - by nimmbl

  Which form of mobile detection should I use and why? <meta name="viewport" content="width=320,initial-scale=1,maximum-scale=1.0,user-scalable=no" /> <link media="only screen and (max-device-width: 480px) and (min-device-width:…

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• Is it possible to achieve MAX(As,Ad) openGL blending?

  - by Jeff B

  I am working on a game where I want to create shadows under a series of sprites on a grid. The shadows are larger than the sprites themselves and the sprites are animated (i.e. move and rotate). I cannot simply render them into the…

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• how to pull and display range (min-max) data for each page in pagination?

  - by Ty W

  I have a table of data that is searchable and sortable, but likely to produce hundreds or thousands of results for broad searches. Assuming the user searches for "foo" and sorts the foos in descending price order I'd like to show a…

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• Reducing Time Complexity in Java

  - by Koeneuze

  Right, this is from an older exam which i'm using to prepare my own exam in january. We are given the following method: public static void Oorspronkelijk() { String bs = "Dit is een boodschap aan de wereld"; int max = -1; …

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• Generation of an array with defined Min, Max, Mean and Stdev with given number of elements and error

  - by Viet

  I'd like to generate an array with defined Min, Max, Mean and Stdev with given number of elements and error level. Is there such a library in C, C++, PHP or Python to do so? Please kindly advise. Thanks!

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• Generation of an array of Random numbers with defined Min, Max, Mean and Stdev with given number of

  - by Viet

  I'd like to generate an array of Random numbers with defined Min, Max, Mean and Stdev with given number of elements and error level. Is there such a library in C, C++, PHP or Python to do so? Please kindly advise. Thanks!

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