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• Scanning a mysql table from the bottom

  - by ming yeow

  When i run a mysql select statement, it takes very long because i have already previously deleted a very large number of rows. Is there a way for the table to start scanning from the bottom, as opposed to from the top?

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• Why does this code sometimes throw a NullPointerException?

  - by Tiberiu Hajas

  Consider the following Java source: if( agents != null ) { for( Iterator iter = agents.keySet().iterator(); iter.hasNext(); ) { // Code that uses iter.next() ... // } } The agents is a HashMap. Why does the for statement sometimes throw a NullPointerException? Thank you.

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• How to create a temporary table in Oracle

  - by GigaPr

  Hi I would like to create a temporary table in a Oracle database something like Declare table @table (int id) In SQL server And than populate it with a select statement Is it possible? Thanks

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• Will IE9 support conditional comments?

  - by greim

  I thought I remembered reading somewhere that IE9 would not be supporting them, but now after searching I can't find any indication that this is true. Is anyone aware of a definitive statement, either way, about whether Microsoft will be supporting conditional comments in IE9?

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• Jquery .text() call returns null?

  - by Alex

  Hey all, I'm practicing Jquery and I've written this simple Jquery statement: var someText = $("table tr td").text(); Should this not return all text of td elements found within tr's that are found within tables? How do I fix this? Currently when I run this, it says that table tr td is null, but I have a table on the page I'm testing on. Thanks!

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• how to run if(!User.IsAuthenticated) or access Profile.values in App_Code? c# .NET

  - by korben

  i'm trying to run a conditional statement in a class i'm placing in my App_Code folder the condition is whether the person is logged in or not. I normally have two ways to do this in my masterpage and ASPX's if (!User.IsAuthenticated) or if(Profile.username = "anonymous") however neither of these things seem available to me in the .cs i'm making. anyone know what i'm missing? maybe a using namespace up top?

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• How can I check for unused import in many Python files?

  - by Thierry Lam

  I remember when I was developing in C++ or Java, the compiler usually complains for unused methods, functions or imports. In my Django project, I have a bunch of Python files which have gone through a number of iterations. Some of those files have a few lines of import statement at the top of the page and some of those imports are not used anymore. Is there a way to locate those unused imports besides eyeballing each one of them in each file? All my imports are explicit, I don't usually write from blah import *

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• Unknown Column In Where Clause

  - by Corpo

  I have a simple query: SELECT u_name AS user_name FROM users WHERE user_name = "john"; I get "Unknown Column 'user_name' in where clause". Can I not refer to 'user_name' in other parts of the statement even after select 'u_name as user_name'?

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• What is the purpose of ROWLOCK on Delete and when should I use it?

  - by RPS

  Ex) When should I use this statement: DELETE TOP (@count) FROM ProductInfo WITH (ROWLOCK) WHERE ProductId = @productId_for_del; And when should be just doing: DELETE TOP (@count) FROM ProductInfo WHERE ProductId = @productId_for_del;

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• "Blank SQL" error with phppgadmin

  - by Hoàng Long

  Here is my problem: I export a database A_DB using "export" function of Phppgadmin. The dump file A_dump.sql includes both the database structure and data. Then I try to create another blank database B_DB, and import A_dump.sql into it. Every time I do that, the transaction failed with no error reported: SQL error: In statement: Is there some logs that I can find in phppgadmin that would allow me to investigate this problem? I have tried searching for an hour, but still not find anything.

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• Magento Reindexing doesn't work

  - by Dgent

  I recently created around 700 attributes through script, all attributes look fine at backend. But when I reindex, I get following error: exception 'PDOException' with message 'SQLSTATE[42S22]: Column not found: 1054 Unknown column 'e.additional_information_s' in 'field list'' in /lib/Zend/Db/Statement/Pdo.php:228 Note: this attribtue exist in Database (eav_attribtue) table. I would highly appreciate suggestion. Looking forward to heat from you geeks. Thanks

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• MVC 4 Controller Compilation Error trying to return a Model

  - by Joe

  This is a newbie configuration problem I suspect. See return statement comment in code snippet. [HttpGet] public ActionResult TestService() { ViewBag.Message = "DataLayer Service"; Service dataLayerService = new Service {CookieContainer = new CookieContainer()}; dataLayerService.SetSessionAppName("SAND"); WebServiceModel webServiceModel = new WebServiceModel(); webServiceModel.Result = dataLayerService.GetSessionAppName(); return this.View(webServiceModel); // <== Cannot resolve View "TestService" }

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• How to write 2 statements that differ just by Operator type in VB.NET

  - by Richard Bysouth

  Hi I have the following code sample, where the only difference between the 2 parts of the If statement is the less than/greater than operators. Is there a better way to write this? Could almost do with being able to define an Operator variable. If myVar = true Then Do While (X < Y) 'call Method A Loop Else Do While (X > Y) 'call Method A Loop End If thanks

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• C++ header file and function declaration ending in "= 0"

  - by Adam

  hi, I have the following code inside the .h file and I'm not sure what does the assignment statement do and how is it called properly? virtual void yield() = 0; I thought that the function returns a value of 0 by default but since this function returns void I am a little bit confused. Can anyone comment on this and maybe say how can I refer to this assignment, I mean how is it called in C++ jargon? Thanks.

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• How to construct these HQL statements

  - by losintikfos

  Do anyone know how to construct these two SQL statement in HQL; SELECT MIN(id) FROM Books WHERE mid < ? OR mid =? SELECT SUM(noOfBooks) FROM Bookcount WHERE mId=128

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• if with multiple conditions, order of execution

  - by markus

  Hi, In an if statement with multiple conditions is second executed if the outcome is clear after checking the first condition? example: if(i>0 && array[i]==0){ } If I swap the conditions a seg fault may occur for negative values of i but this way the memory debugger doesn't find a problem. Can I be sure that this works always or do have have to use nested if statements?

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• How do I play with test command properly?

  - by httpinterpret

  [root@jiaoyou ~]# test 1 = 1 -a 0 = 1 [root@jiaoyou ~]# if [1 = 1 -a 0 = 1]then echo 1;else echo 2;fi -bash: syntax error near unexpected token `else' Why test doesn't give any output and the if statement fails? Can someone point out what's wrong here?

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• Display the Element ID

  - by Gokul

  I am using this statement alert(el.parent().next()); But I am getting [object] [object] as an alert. How do I display the ID of the element?

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• Creating an instance within the Class itself

  - by didxga

  What's going on when the assignment statement executed at Line 4, does compiler ignore the new operator and keep the foo variable being null or something else happen to handle this awkward moment? public class Foo { // creating an instance before its constructor has been invoked, suppose the "initializing" // gets printed in constructor as a result of the next line, of course it will not print it private Foo foo = new Foo();//Line 4 public Foo() { System.out.println("initializing"); } }

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• Zend Framework Multiple Table Query

  - by Jeff

  I am looking to execute this statement via Zend Framework. As I understand it, I can use Zend_Db_Select. Is it possible to use Zend_Db_Table? Three tables: classes, students, and class_students select classes.name, students.student_id, students.fname, students.lname from students, classes, class_students where class_students.student_id=students.student_id AND class_students.class_id=classes.class_id;

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• AppendTo does not work as desired

  - by Gokul

  When I say, msg.appendTo(ele.parent().next()), the msg successfully gets appended to a <p> with class=foo How can I specify it explicitly in the statement? I tried msg.appendTo(ele.parent().next().find('.foo')); but it doesn't work

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• In SQL Server, how can I insert data into a table that has just one column which is of identity type

  - by Yousui

  In SQL Server, how can I insert data into a table that has just one column which is of identity type? Such as insert into the following table t. How can I write the insert statement? CREATE TABLE t ( id INT IDENTITY(1, 1) PRIMARY KEY ) Great thanks.

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• PHP function, return by value or by reference?

  - by Andree

  Hi there! When I use return statement in PHP, will the result be returned by value or by reference? Thanks! Andree.

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• Easy mysql question regarding primary keys and an insert

  - by MPX

  In mysql, how do I get the primary key used for an insert operation, when it is autoincrementing. Basically, i want the new autoincremented value to be returned when the statement completes. Thanks!

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• nested sql statements

  - by Hadad

  Hello, I've a self join table when I delete or update it's id I want to delete or update all the direct and indirect affected records SQL server does not allow this type of cycle cascading I've decided to use triggers but this triggers will file recursively and they will be terminated at 34 level and I don't know the depth of records and event I disable the trigger and re enable it after completing the process how can I construct a SQL statement that achieve this logic?

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