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• I am not able to create foreign key in mysql Error 150. Please help

  - by Shantanu Gupta

  i am trying to create a foreign key in my table. But when i executes my query it shows me error 150 Error Code : 1005 Can't create table '.\vts#sql-6ec_1.frm' (errno: 150) (0 ms taken) My Queries are Query to create a foreign Key alter table `vts`.`tblguardian` add constraint `FK_tblguardian` FOREIGN KEY (`GuardianPickPointId`)…

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• Why does set key not do anything in AES/SymmetricAlgorithm?

  - by acidzombie24

  This MESSED ME UP hard. I thought i was setting the key but i was not. No exceptions, nothing happen except bad results. Why is there a setter if everything is ignored and no exceptions are thrown when i attempt to write? What is the point of the setter on the Keys property? When i do the below Key value are not changed. After an hour when…

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• What exactly does ssh send when performing key negotiation?

  - by Checkers

  When explicitly specifying identity file to ssh: ssh -i ./id_rsa ... I have these lines in ssh debug trace: debug1: Offering public key: ./id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply Does it mean ssh-generated id_rsa contains public RSA exponent as well, or ssh is sending out my private key?…

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• KeePass: use a key file or a regular password?

  - by RCIX

  I'm setting up a KeePass database and it offers the ability to use a key file, which it says is more secure because it can use a longer and more complex password but is easier to break because you only need the key file to open the database. I'll only be using the key file on 2 computers (one desktop and one laptop), wo which is the…

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• NHibernate Mapping and Querying Where Tables are Related But No Foreign Key Constraint

  - by IanT8

  I'm fairly new to NHibernate, and I need to ask a couple of questions relating to a very frequent scenario. The following simplified example illustrates the problem. I have two tables named Equipment and Users. Users is a set of system administrators. Equipment is a set of machinery. Tables: Users table has UserId int and…

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• Foreign key not stored in child entity (one-to-many)

  - by Kamil Los

  Hi, I'm quite new to hibernate and have stumbled on this problem, which I can't find solution for. When persisting parent object (with one-to-many relationship with child), the foreign-key to this parent is not stored in child's table. My classes: Parent.java @javax.persistence.Table(name = "PARENT") @Entity public class…

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• XSLT1.0: remove duplicates combined with an xsl:key

  - by Jannibal

  I have the following piece of XML: <research> <research.record> <research.record_number>1</research.record_number> <research.type> <value lang="en-US">some research type</value> </research.type> <research.type> <value lang="en-US">some…

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• Sum multi dimensional array based on a key in php

  - by user1328178

  I have mutiple arrays say for now 2, first array has Cities(Mumbai, Pune. Bangalore, Hyderabad) And 2nd array has Mumbia nad Hyderabd. I want to sum up the values based on the Key. Array ( [Mumbai] = Array ( [ga:pageviews] = 1 [ga:visits] = 1 [ga:newVisits] = 1 …

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• ASA hairpining: I basicaly want to allow 2 spokes to be able to communicate with each other.

  - by Thirst4Knowledge

  ASA Spoke to Spoke Communication I have been looking at spke to spoke comms or "hairpining" for months and have posted on numerouse forums but to no avail. I have a Hub and spoke network where the HUB is an ASA Firewall version 8.2 * I basicaly want to allow 2 spokes to be able to communicate with each other. I think…

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• design of orm tool

  - by ifree

  Hello , I want to design a orm tool for my daily work, but I'm always worry about the mapping of foreign key. Here's part of my code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; namespace OrmTool { [AttributeUsage(AttributeTargets.Property)] public…

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• Locate RFID tag using iPhone

  - by Dan

  Hi all, I am looking into building an app (on my laptop to start) that would be able to locate the signal emitted by an RFID tag (non passive). Say I attach this to my key ring, what would be required of the application to triangulate the location of the RFID tag in a 10m range. Would this even be possible using this…

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• [rails] do we need database level constraints

  - by shrimpy

  i have the same problem as in the following post http://stackoverflow.com/questions/1451570/ruby-on-rails-database-migration-not-creating-foreign-keys-in-mysql-tables so i am wondering, why rails do not support generate foreign key by default??? it is not necessary??? or we suppose to do it manually?

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• How to change bahaviour enter/backspace pressed in WYMEDITOR

  - by liysd

  Hi all, In Google Chrome after pressing enter key in WYMEDITOR a new is created. How to change it? I would rather insert tag as it happens after shift-enter combination. (In fact shif-enter creates two ). Similar question concerns backspace pressed on the beginning of paragraph. How to change this behaviour to…

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• identity specification gap after several operations

  - by Babak.Abad

  I'm using identity specification for a table of sql server 2012. Let we have two Insert and then two Delete operation. After these operation primary key should start from 1, but it will start from 3. I'm worry about this problem causing no place for inserting new item after long time. Does "Sql-server 2012" fill…

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• What alternatives do I have if I want a distributed multi-master database?

  - by Jonas

  I will build a system where I want to reduce single-point-of-failures, and I need a database. Is there any (free) relational database systems that can handle multi-master setups good (i.e where it is easy to add and remove nodes) or is it better to go with a NoSQL-database? As what I have understood, a…

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• Are Multi-column Primary Keys in MySQL a optimisation problem?

  - by David

  Been looking into using multi-column primary keys and as performance is extremely important with the size of traffic and database I need to know if there is anything to consider before I start throwing out the unique ID method on many of my tables and start using mulit column primary keys. So, what are…

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• How does datagridview handle "Master / Detail"?

  - by Behrooz

  In .net objects like DataTable when you have two grids(Master and Detail) and add a row to the second one(Detail), The new row will have the Foreign-Key Values automatically. How can i do it(I don't use DataTables because they suck)? thanks.

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• How to configure reference to be deleted on parent table update?

  - by abatishchev

  I have two tables: info: ID, fee_id and fee: ID, amount and a reference between them (SQL Server 2008): ALTER TABLE info WITH CHECK ADD CONSTRAINT FK_info_fee FOREIGN KEY(fee_id) REFERENCES fee (ID) ALTER TABLE info CHECK CONSTRAINT FK_info_fee GO How to configure this reference that way so a…

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• How do I create an index on a table that is non unique?

  - by RoboShop

  I want an index on a non-primary key column, but this column may have nulls in it. I find on a normal unique index, it (rightly so) only allows one null. Is that possible? and what is the syntax for this?

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• KeyNotFound Exception in CSsharp

  - by C Patton

  I'm about ready to bang my head against the wall I have a class called Map which has a dictionary called tiles. class Map { public Dictionary<Location, Tile> tiles = new Dictionary<Location, Tile>(); public Size mapSize; public Map(Size size) { this.mapSize =…

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• What needs to be passed to an editor from a keyboard app to move the cursor one char left?

  - by yno

  What key code does an Android editor app expect the keyboard app to send when it is going to be interpreted as a left arrow? In other words, what is the keyboard program supposed to send to its calling program (some kind of editor) if the user intends to move the cursor one char to the left? A…

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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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• Android: How to create custom shape keys on keyboard?

  - by Solata

  I wonder how could is possible to make custom shape key on android keyboard. To create custom keyboard is relatively easy, but what needs to be done to create new buttons. They also need to respond with all events as normal keyboard. Any ideas where to start?

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• What are the techniques to implement evaluation period and ensure it is not tempered?

  - by understack

  I've a simple product installer for windows OS, which could be evaluated for a month. What are the techniques I can use so that this piece of software is not used after a month? I've seen that several s/w use system date to check it but it's very primitive and easily forge-able. I think a key…

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• iPhone keyboard's return key will move curser to next textfield

  - by iAm

  Hello Fellow Koder ••• I have a TableViewController that is using a grouped Style and has two(2) sections. The first section has 4 rows and the second section has 3 rows. I have placed a UILabel and a UITextField in each cell, and have a custom method(textFieldDone:) to handle the cursor…

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