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  • SQL: Find difference between dates with grouping

    - by ajbeaven
    I have a problem that seems similar to this fellow - I just want to display the data slightly differently. I'm pretty terrible with SQL so can't modify it to suit, but perhaps someone else can. My table looks similar to this (date format is dd/mm/yyyy): ID User Date_start Role 1 Andy 01/04/2010 A 2 Andy 10/04/2010 B 3 Andy 20/04/2010 A 4 John 02/05/2010 A I want to show the total number of days that anyone was in a certain role. Users stay in the role until there is another entry into the table. Users can only be in one role at a time. So the summary data would look like this (assuming that the date is 04/05/2010): A: 26 days B: 10 days Thanks for any help :)

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  • C#, WindowsForms difference to simple Console App

    - by daemonfire300
    Hi there, I currently started to "port" my console projects to WinForms, but it seems I am badly failing doing that. I am simply used to a console structure: I got my classes interacting with each other depending on the input coming from the console. A simple flow: Input -> ProcessInput -> Execute -> Output -> wait for input Now I got this big Form1.cs (etc.) and the "Application.Run(Form1);" But I really got no clue how my classes can interact with the form and create a flow like I described above. I mean, I just have these "...._Click(object sender....)" for each "item" inside the form. Now I do not know where to place / start my flow / loop, and how my classes can interact with the form. thanks and regards daemonfire

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  • Difference between Popup's IsOpen and Visibility properties?

    - by cfouche
    I've played around with the WPF Popup Control and as far as I can see, the Visibility property is superfluous. If you have a Popup with IsOpen = True, it will be visible even if its Visibility = Collapsed. If you have a Popup with IsOpen = False, then its Visibility will be Collapsed, and will remain "Collapsed" when IsOpen changes to true, and it will appear. (i.e. you'll have something that appears on your screen, even though Snoop says it is Collapsed.) Why does the Popup control have both these properties? Am I missing something here?

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  • Difference between two commands of fetching Shopping Cart Items in Magento

    - by Knowledge Craving
    In Magento, if you need to get / fetch the Shopping Cart's Item details, you can do it in any of the two possible ways, which will provide you with all the shopped Items in an array:- $cartItems1 = $cart->getQuote()->getAllItems(); $cartItems2 = $cart->getItems()->getData(); But before using any one of the above two methods, you need to initialize the shopping cart object as:- $cart = new Mage_Checkout_Model_Cart(); $cart->init(); Can anyone please describe in details as to what the two options provide & their differences between each other, along with their possible usage. In any more such option is available in Magento, can anyone please highlight it?

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  • One hour difference in Python

    - by Joel
    Hello, I have a datetime.datetime property var. I would like to know if it is less than one hour of the current time. Something like var.hour<datetime.datetime.today().hour - 1 Problem with the above syntax is that datetime.datetime.today().hour returns a number such as "10" and it is not really a date comparation but more of a numbers comparation. What is the correct syntax? Thanks! Joel

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  • SQL Server 2008 - Difference between time(0)

    - by lugeno
    I've a table with working_hours time(0), lunch_hours time(0) What I have to do is the following: If lunch_hours is greater that one hour, I have to calculate the offset Example: lounch_hour = 01:30:00 = offset = 00:30:00 Once done I've to subtract the offset from the working_hours value Example: offset = 00:30:00, working_hours = 07:30:00 = working_hours = 07:00:00 The result must be in time(0) format (hh:mm:ss) I've tried several solutions but still not working. Used DATEDIFF probably didn't used in correct way. Thanks for any help Bye!

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  • Major performance difference between two Oracle database instances

    - by jrdioko
    I am working with two instances of an Oracle database, call them one and two. two is running on better hardware (hard disk, memory, CPU) than one, and two is one minor version behind one in terms of Oracle version (both are 11g). Both have the exact same table table_name with exactly the same indexes defined. I load 500,000 identical rows into table_name on both instances. I then run, on both instances: delete from table_name; This command takes 30 seconds to complete on one and 40 minutes to complete on two. Doing INSERTs and UPDATEs on the two tables has similar performance differences. Does anyone have any suggestions on what could have such a drastic impact on performance between the two databases?

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  • Difference in regex between Python and Rubular?

    - by Rosarch
    In Rubular, I have created a regular expression: (Prerequisite|Recommended): (\w|-| )* It matches the bolded: Recommended: good comfort level with computers and some of the arts. Summer. 2 credits. Prerequisite: pre-freshman standing or permission of instructor. Credit may not be applied toward engineering degree. S-U grades only. Here is a use of the regex in Python: note_re = re.compile(r'(Prerequisite|Recommended): (\w|-| )*', re.IGNORECASE) def prereqs_of_note(note): match = note_re.match(note) if not match: return None return match.group(0) Unfortunately, the code returns None instead of a match: >>> import prereqs >>> result = prereqs.prereqs_of_note("Summer. 2 credits. Prerequisite: pre-fres hman standing or permission of instructor. Credit may not be applied toward engi neering degree. S-U grades only.") >>> print result None What am I doing wrong here?

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  • Is there a difference here?

    - by HotHead
    Please consider following code: 1. uint16 a = 0x0001; if(a < 0x0002) { // do something } 2. uint16 a = 0x0001; if(a < uint16(0x0002)) { // do something } 3. uint16 a = 0x0001; if(a < static_cast<uint16>(0x0002)) { // do something } 4. uint16 a = 0x0001; uint16 b = 0x0002; if(a < b) { // do something } What compiler does in backgorund and what is the best (and correct) way to do above testing? p.s. sorry, but I couldn't find the better title :) Thank you in advance!

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  • Difference in linq-to-sql query performance using GenericRespositry

    - by Neil
    Given i have a class like so in my Data Layer public class GenericRepository<TEntity> where TEntity : class { [System.ComponentModel.DataObjectMethod(System.ComponentModel.DataObjectMethodType.Select)] public IQueryable<TEntity> SelectAll() { return DataContext.GetTable<TEntity>(); } } I would be able to query a table in my database like so from a higher layer using (GenericRepositry<MyTable> mytable = new GenericRepositry<MyTable>()) { var myresult = from m in mytable.SelectAll() where m.IsActive select m; } is this considerably slower than using the usual code in my Data Layer using (MyDataContext ctx = new MyDataContext()) { var myresult = from m in ctx.MyTable where m.IsActive select m; } Eliminating the need to write simple single table selects in the Data layer saves a lot of time, but will i regret it?

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  • Should I be regularly shrinking my DB or at least my log file?

    - by Tom
    My question is, should I be running one or both of the shrink command regularly, DBCC SHRINKDATABASE OR DBCC SHRINKFILE ============================= background Sql Server: Database is 200 gigs, logs are 150 gigs. running this command SELECT name ,size/128.0 - CAST(FILEPROPERTY(name, 'SpaceUsed') AS int) / 128.0 AS AvailableSpaceInMB FROM sys.database_files;` produces this output.. MyDB: 159.812500 MB free MyDB_Log: 149476.390625 MB free So it seems there is some free space. We backup transaction logs every hour, diff backup 5 nights a week, full backup the other 2 nights of the week.

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  • Difference between these two namespaces in javascript

    - by Lol coder
    First off, all I'm trying to do is to structure my javascript code properly. I've been told I must not have anything global. So I took the 2 types of namespaces declaration from this answer and now asking you guys for the pros and cons of each. var namespace1 = new function () { var internalFunction = function () { }; this.publicFunction = function () { }; }; var namespace2 = { publicFunction: function () { } }; Also, how do i have a private function in the last one namespace2?

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