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• SQL to get friends AND friends of friends of a user

  - by Enrique

  My MySQL tables structure is like this. USER int id varchar username FRIEND_LIST int user_id int friend_id For each friend relationship I insert 2 records in FRIEND_LIST. If user 1 is friend of user 2 then the next rows are inserted into FRIEND_LIST 1,2 2,1 I want to get the friends and friends of friends of an specific user. The select should return columns a, b, c. a: user_id b: friend_id c: username (username of friend_id ) If 1 is friend of 2 and 3. 2 is friend of 3, 4 and 5 3 is friend of 5,6,7 Then the query to get 1's friends and friends of friends should return: 1 2 two 1 3 three 2 1 one 2 3 three 2 4 four 2 5 five 3 1 one 3 5 five 3 6 six 3 7 seven Can I get this rows with a single query?

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• Oracle/c#: How do i use bind variables with select statements to return multiple records?

  - by twiga

  I have a question regarding Oracle bind variables and select statements. What I would like to achieve is do a select on a number different values for the primary key. I would like to pass these values via an array using bind values. select * from tb_customers where cust_id = :1 int[] cust_id = { 11, 23, 31, 44 , 51 }; I then bind a DataReader to get the values into a table. The problem is that the resulting table only contains a single record (for cust_id=51). Thus it seems that each statement is executed independently (as it should), but I would like the results to be available as a collective (single table). A workaround is to create a temporary table, insert all the values of cust_id and then do a join against tb_customers. The problem with this approach is that I would require temporary tables for every different type of primary key, as I would like to use this against a number of tables (some even have combined primary keys). Is there anything I am missing?

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• How to do some preformance testing in asp.net mvc?

  - by chobo2

  Hi I am using asp.net mvc 2.0 and I want to test how long it takes to do some of my code. In one senario I do this load xml file up. validate xml file and deserailze. validate all rows in the xml file with more advanced validation that cannot be done in the schema validation. then I do a bulk insert. I want to know how long steps 1 to 3 take and how long step 4 takes. I tried to do like DateTime.UtcNow in areas and subtract them but it told me it took like 3 seconds but I know that is not right as steps 1 to 4 take 2mins to do.

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• SQL Get Latest Unique Rows

  - by Simpleton

  I have a log table, each row representing an object logging its state. Each object has a unique, unchanging GUID. There are multiple objects logging their states, so there will be thousands of entries, with objects continually inserting new logs. Everytime an object checks in, it is via an INSERT. I have the PrimaryKey, GUID, ObjectState, and LogDate columns in tblObjects. I want to select the latest (by datetime) log entry for each unique GUID from tblObjects, in effect a 'snapshot' of all the objects. How can this be accomplished?

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• Uploading a csv file to sql server - Identity problem.

  - by Doozer1979

  Given a column structure in a CSV file of: First_Name, Last_Name, Date_Of_Birth And a SQL Server table with a structure of ID(PK) | First_Name | Last_Name | Date_Of_Birth (Field ID is an Identity with an auto-increment of 1) How do i arrange it so that SQL Server does not attempt to insert the First_Name column from the csv file into the ID field? For info the csv is loaded into a DataTable and then copied to SQL Server using SqlBulkCopy Should i be modifying the csv file before the import add the ID column (The destination table is truncated prior to import, so no need to worry about duplicate key values.) Or perhaps adding an id column to the Datatable? Or Is there a setting in Sql Server that i may have missed?

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• Syntax for "RETURNING" clause in Mysql PDO

  - by dmontain

  I'm trying to add a record, and at the same time return the id of that record added. I read it's possible to do it with a RETURNING clause. $stmt->prepare("INSERT INTO tablename (field1, field2) VALUES (:value1, :value2) RETURNING id"); but the insertion fails when I add RETURNING. There is an auto-incremented field called id in the table being added to. Can someone see anything wrong with my syntax? or maybe PDO does not support RETURNING?

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• Asp.net cached objects staying in memory

  - by GordonB

  I have a asp.net web forms app that uses System.Web.Caching.Cache to cache xml data from a number of web services for 2 hours. webCacheObj.Remove(dataCacheKey) webCacheObj.Insert(dataCacheKey, dataToCache, Nothing, DateTime.Now.AddHours(2), Nothing) Every 90 minutes a Microsoft Search Server hits a particular (spider) page which calls the code to put the objects into the cache. The issue i have is that over a period of time, the memory usage of the application grows exponentially. Lets say that in a week, the memory usage of the application pool grows to over 1gb. I'm using IIS7 and no application pool recycling is currently enabled.

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• I'm new to C++. Please Help me with the Linked List (What functions to add)?

  - by Igal

  DEAR All; Hi, I'm just beginner to C++; Please help me to understand: What functions should be in the Linked list class ? I think there should be overloaded operators << and ; Please help me to improve the code (style, errors, etc,) Thanks for advance. Igal. Please review the small code for the integer List (enclosed MyNODE.h and ListDriver1.cpp); MyNODE.h // This is my first attempt to write linked list. Igal Spector, June 2010. #include <iostream.h> #include <assert.h> //Forward Declaration of the classes: class ListNode; class TheLinkedlist; // Definition of the node (WITH IMPLEMENTATION !!!, without test drive): class ListNode{ friend class TheLinkedlist; public: // constructor: ListNode(const int& value, ListNode *next= 0); // note: no destructor, as this handled by TheLinkedList class. // accessor: return data in the node. // int Show() const {return theData;} private: int theData; //the Data ListNode* theNext; //points to the next node in the list. }; //Implementations: //constructor: inline ListNode::ListNode(const int &value,ListNode *next) :theData(value),theNext(next){} //end of ListNode class, now for the LL class: class TheLinkedlist { public: //constructors: TheLinkedlist(); virtual ~TheLinkedlist(); // Accessors: void InsertAtFront(const &); void AppendAtBack(const &); // void InOrderInsert(const &); bool IsEmpty()const;//predicate function void Print() const; private: ListNode * Head; //pointer to first node ListNode * Tail; //pointer to last node. }; //Implementation: //Default constructor inline TheLinkedlist::TheLinkedlist():Head(0),Tail(0) {} //Destructor inline TheLinkedlist::~TheLinkedlist(){ if(!IsEmpty()){ //list is not empty cout<<"\n\tDestroying Nodes"<<endl; ListNode *currentPointer=Head, *tempPtr; while(currentPointer != 0){ //Delete remaining Nodes. tempPtr=currentPointer; cout<<"The node: "<<tempPtr->theData <<" is Destroyed."<<endl<<endl; currentPointer=currentPointer->theNext; delete tempPtr; } Head=Tail = 0; //don't forget this, as it may be checked one day. } } //Insert the Node to the beginning of the list: void TheLinkedlist::InsertAtFront(const int& value){ ListNode *newPtr = new ListNode(value,Head); assert(newPtr!=0); if(IsEmpty()) //list is empty Head = Tail = newPtr; else { //list is NOT empty newPtr->theNext = Head; Head = newPtr; } } //Insert the Node to the beginning of the list: void TheLinkedlist::AppendAtBack(const int& value){ ListNode *newPtr = new ListNode(value, NULL); assert(newPtr!=0); if(IsEmpty()) //list is empty Head = Tail = newPtr; else { //list is NOT empty Tail->theNext = newPtr; Tail = newPtr; } } //is the list empty? inline bool TheLinkedlist::IsEmpty() const { return (Head == 0); } // Display the contents of the list void TheLinkedlist::Print()const{ if ( IsEmpty() ){ cout << "\n\t The list is empty!!"<<endl; return; } ListNode *tempPTR = Head; cout<<"\n\t The List is: "; while ( tempPTR != 0 ){ cout<< tempPTR->theData <<" "; tempPTR = tempPTR->theNext; } cout<<endl<<endl; } ////////////////////////////////////// The test Driver: //Driver test for integer Linked List. #include <iostream.h> #include "MyNODE.h" // main Driver int main(){ cout<< "\n\t This is the test for integer LinkedList."<<endl; const int arraySize=11, ARRAY[arraySize]={44,77,88,99,11,2,22,204,50,58,12}; cout << "\n\tThe array is: "; //print the numbers. for (int i=0;i<arraySize; i++) cout<<ARRAY[i]<<", "; TheLinkedlist list; //declare the list for(int index=0;index<arraySize;index++) list.AppendAtBack( ARRAY[index] );//create the list cout<<endl<<endl; list.Print(); //print the list return 0; //end of the program. }

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• Starting self hosted WCF services on demand

  - by Pieter

  Is it possible to start self hosted WCF services on demand? I see two options to accomplish this: Insert a listener in the self hosted WCF's web server and spin up a service host when a request for a specific service comes in, before WCF starts looking for the existence of that endpoint; or Integrate a web service in process, start a service host for a request if it isn't running yet and redirect the request to that service host (like I suspect IIS does). I cannot use IIS or WAS because the web services need to run in process with the UI business logic. Which is feasible and how can I accomplish this? EDIT: I cannot just start the service hosts because there are hundreds, most (about 95%) of which are (almost) never used but need to be available. This is for exposing a business logic layer of 900 entities.

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• grails and flash movie

  - by ziftech

  Is it possibe to insert into GSP simple flash movie? I tried this way: <object type="application/x-shockwave-flash" data="${resource(dir:'flash',file:'movie.swf')}" width="400" height="400"> <param name="movie" value="${resource(dir:'flash',file:'movie.swf')}" /> <param name="bgcolor" value="#ffffff" /> <param name="AllowScriptAccess" value="always" /> <param name="flashvars" value="feed=${resource(dir:'flash',file:'movie.xml')}" /> <p>This widget requires Flash Player 9 or better</p> </object> It seems that movie is loaded but .xml and pictures are not...

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• Bash Scripting: I want to open a set of .php files, and add line before html tag

  - by Bashn00b

  Hi guys, I have a set of .php files in a folder, I want to add text just before these lines: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" > What i want is to insert just before these lines in the html file. So just want to prepend that file before each docType declaration. However the DOCTYPE declaration is never on line 1, as there is loads of php lines before. I have this current script (where FE is the folder containing all the scripts i want to edit): for file in ${fe}*; do echo "$file" done Thanks,

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• Perl DBI - run SQL Script with multiple statements

  - by guigui42

  I have a sql file test.sql used to run some SQL (create object / update / delete / insert) that can look like this CREATE TABLE test_dbi1 ( test_dbi_intr_no NUMBER(15) , test_dbi_name VARCHAR2(100); UPDATE mytable SET col1=1; CREATE TABLE test_dbi2 ( test_dbi_intr_no NUMBER(15) , test_dbi_name VARCHAR2(100); Usually, i would just use SQLPLUS (from within Perl) to execute this test.sql using this command : @test.sql Is there a way to do the same thing, using DBI in Perl ? So far, i found DBI can only execute one statement at a time, and without the ";" at the end.

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• Rails and jQuery - how do you get server-side validation errors to your view after an ajax request

  - by adam

  Ive searched this site but questions are usually regarding doing client-side validations or for different frameworks. I have a tasks list whose items can be edited inline. Upon submitting the inline edit form the item is updated all thanks to jQuery, ajax and rails. But I want to handle bad input from the user. HTML requests redisplay the view and errors are displayed thanks to rails helpers. But how do I insert that information after an ajax call? Heres my update method in my controller def update @task = Task.find(params[:id]) respond_to do |format| if @task.update_attributes(params[:task]) flash[:notice] = 'Task was successfully updated.' format.html { redirect_to(@task) } format.xml { head :ok } format.js else format.html { render :action => "edit" } format.xml { render :xml => @task.errors, :status => :unprocessable_entity } #format.js ...hmmm... either go to js.erb file or do stuff inline end end end

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• rails error on create action

  - by ash34

  SQL (2.0ms) SELECT task_report_requests_seq.NEXTVAL id FROM dual TaskReportRequest Create (2.2ms) INSERT INTO task_report_requests (location, created_at, updated_at, id, freq, login, task_dt) VALUES('020', TO_DATE('2010-05-25 05:02:38','YYYY-MM-DD HH24:MI:SS'), TO_DATE('2010-05-25 05:02:38','YYYY-MM-DD HH24:MI:SS'), 10023, 'M', NULL, TO_DATE('2010-05-30 00:00:00','YYYY-MM-DD HH24:MI:SS')) NoMethodError (You have a nil object when you didn't expect it! The error occurred while evaluating nil.call): app/controllers/task_report_requests_controller.rb:45:in `create' It says error evaluating nil.call . Can someone tell me when I would get such an error. I am not able to figure out with this information. thanks, ash

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• What does it mean to do/determine something "programmatically"?

  - by Chris Lutz

  Programmatically. (alt. programmically) I've never used it, but I see it in questions a lot, i.e. "How to programmatically determine [insert task here]". Firefox immediately tells me that neither of these two words are real (at least, it doesn't recognize them). I've also never seen them used anywhere but here. 1) What does it mean to do/determine something "programmatically"? 2) Why do so many people ask how to do/determine something "programmatically"? Isn't it assumed that, if you're asking how to do something on a programming help board, you're asking how to do it "programmatically"? 3) Why is it that I've never seen the word "programmatically" anywhere else?

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• Doctrine inserts when it should update

  - by Goran Juric

  I am trying to use do the most simple update query but Doctrine issues an INSERT statement instead of an UPDATE. $q = Doctrine_Query::create() ->from('Image i') ->where('id = ?'); $image = $q->fetchOne($articleId, Doctrine_Core::HYDRATE_RECORD); $image->copyright = "some text"; $image->save(); I have also tried using the example from the manual, but still a new record gets inserted: $userTable = Doctrine_Core::getTable('User'); $user = $userTable->find(2); if ($user !== false) { $user->username = 'Jack Daniels'; $user->save(); } edit: This example from the manual works: $user = new User(); $user->assignIdentifier(1); $user->username = 'jwage'; $user->save(); The funny thing is that I use this on another model and there it works OK. Maybe I have to fetch the whole array graph for this to work (I have another model in a one to many relationship)?

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• Java library to partially export a database while respecting referential integrity constraints

  - by Mwanji Ezana

  My production database is several GB's uncompressed and it's getting to be a pain to download and run locally when trying to reproduce a bug or test a feature with real data. I would like to be able to select the specific records that interest me, then have the library figure out what other records are necessary to produce a dataset that respects the databases integrity constraints and finally print it out as a list of insert statements or dump that I can restore. For example: given Author, Blog and Comment tables when I select comments posted after a certain date I should get inserts for the Blog records the comments have foreign keys to and the Author records those Blogs have foreign keys to.

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• How can I create a google-spreadsheet using C#

  - by Kev

  I've installed the latest Google Data API for .Net. But I cannot figure out how to create a spreadsheet using C# code. It's not included in the sample programs. I've tried this: SpreadsheetsService ss = new SpreadsheetsService("Spreadsheet Example"); ss.setUserCredentials("[email protected]", "password"); SpreadsheetEntry se = new SpreadsheetEntry(); se.Title.Text = "new"; ss.Insert(new Uri("http://spreadsheets.google.com/feeds/spreadsheets/private/full"), se); However, It doesn't work! Is there some way to do this job? Thank you!

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• How to add columns to sqlite3 python?

  - by user291071

  I know this is simple but I can't get it working! I have no probs with insert,update or select commands, Lets say I have a dictionary and I want to populate a table with the column names in the dictionary what is wrong with my one line where I add a column? ##create con = sqlite3.connect('linksauthor.db') c = con.cursor() c.execute('''create table linksauthor (links text)''') con.commit() c.close() ##populate author columns allauthors={'joe':1,'bla':2,'mo':3} con = sqlite3.connect('linksauthor.db') c = con.cursor() for author in allauthors: print author print type(author) c.execute("alter table linksauthor add column '%s' 'float'")%author ##what is wrong here? con.commit() c.close()

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• Why getting active record error when trying to work on arrays?

  - by keruilin

  I have the following association in my User model: has_and_belongs_to_many :friends, :class_name => 'User', :foreign_key => 'friend_id' I have the following uniqueness constraint in my user_users table: UNIQUE KEY `no_duplicate_friends` (`user_id`,`friend_id`) In my code, I am retrieving a user's friends -- friends = user.friends. friends is an array. I have a scenario where I want add the user with all those friends to the friends array. Ex: friends << user_with_all_those_homies However, I get the following error: ActiveRecord::StatementInvalid: Mysql::Error: Duplicate entry '18-18' for key 'no_duplicate_friends': INSERT INTO `users_users` (`friend_id`, `user_id`) VALUES (18, 18) What gives?

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• Crystal Reports and WMF image

  - by Eve

  I have a problem with inserting a vector graphics (WMF) into report (Crystal Reports v10.5 from Visual Studio 2008). The image is static, inserted by choosing "Insert Picture" during report design in VS. The problem is that it displays differently (size and aspect ratio) on machines with different operating systems and screen resolutions. Converting to bitmap isn't possible beacause loss of the quality of print isn't acceptable. I thought about dynamic loading of the image, but in this version of CR. I don't see a possibility to set dynamic graphic location in picture properties. Is there any way to solve this problem?

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• Using SHIFT_JIS text in PHP

  - by Joe Corkery

  I am building a form that needs to accept characters encoded in SHIFT_JIS and then send those results via email to a recipient. I've tried to simply capture the results from the $_POST variable and then to insert them into a block of text like this: $contents = <<<TEST Name: $NameJp ... TEST but that doesn't appear to work (which doesn't really surprise me). This is my first attempt at dealing with non-ASCII characters in PHP and I am hoping that people might have some suggestions. Perhaps I am missing a simple function to encode the text. Also, are there any other potential pitfalls that I might encounter? Thanks.

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• SQL Server Cursor data as result of stored procedure

  - by Dmitry Borovsky

  Hello, I have a stored procedure DECLARE cursor FOR SELECT [FooData] From [FooTable]; OPEN cursor ; FETCH NEXT FROM cursor INTO @CurrFooData; WHILE @@FETCH_STATUS = 0 BEGIN SELECT @CurrFooData AS FooData; INSERT INTO Bar (BarData) VALUES(@CurrFooData); FETCH NEXT FROM cursor INTO @CurrFooData; END; CLOSE cursor DEALLOCATE cursor But in result I have a lot of tables, not one. How can I return one table with 'FooData' column and all '@CurrFooData' rows?

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• Asp.net Date Binding Issue with Nulls

  - by Matthew Kruskamp

  I have a nullable date in my database. I am connecting to it with a LinqDataSource, and binding with a FormView. It allows you to place dates fine, but if you remove the date I need it to insert the null value to the db. It is instead throwing an exception. <asp:TextBox ID="TxtStartDate" runat="server" Text='<%# Bind("StartDate", "{0:MM/dd/yyyy}") %>' /> Works fine if you place a date in it, but if you delete the date out of it and save, you get System.Data.SqlTypes.SqlTypeException: SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM. How do I make it send null?

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• inserting date timestamp value to mysql thru php in godaddy hosting site

  - by Suj

  Hi all, I'm using GoDaddy's Shared Linux hosting. Using php i am inserting or updating the mysql database with create date or modified date using the variables $datestring = "%Y:%m:%d %h:%i:%s"; $time = time(); $createdate= mdate($datestring, $time); In this $createdate will be the variable i use to insert or update the table. But its updating the wrong value. ITs not the server time or localtime. mostly its 30 mins delay with godaddy's server time. Pls help.

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