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• Using hash tables in racket

  - by user2963128

  Im working on an Ngrams program and im having trouble filling out my hash table. i want to write out a recursive function that will take the words and add them to the hash table. The way its supposed to work is given the data set 1 2 3 4 5 6 7 the first entry in the hash table should have a key of [1 2] and the data should be 3. The second entry…

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• mysql medium int vs. int performance?

  - by aviv

  Hi, I have a simple users table, i guess the maximum users i am going to have is 300,000. Currently i am using: CREATE TABLE users ( id INT UNSIGEND AUTOINCEREMENT PRIMARY KEY, .... Of course i have many other tables that the users(id) is a FOREIGN KEY in them. I read that since the id is not going to use the full maximum…

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• PHP MySQLi timeout on locked tables?

  - by Marcin

  Hi guys I have a weird problem with mysqli timeout options, here you go: I am using mysqli_init() and real_connect() in order to set MYSQLI_OPT_CONNECT_TIMEOUT $this->__mysqli = mysqli_init(); if(!$this->__mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT,1)) throw new Exception('Timeout settings failed') …

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• Users in database server or database tables

  - by Batcat

  Hi all, I came across an interesting issue about client server application design. We have this browser based management application where it has many users using the system. So obvisously within that application we have an user management module within it. I have always thought having an user table in the…

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• print individual tables ??

  - by LiveEn

  I am getting values from a database and displaying in a table. Im trying to print the results as individual . Im using the below javascript <script type="text/javascript"> function print_parent(element) { element.parentNode.className = 'print'; window.print(); element.parentNode.className = ''; …

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• C# winforms: DataSet with multiple levels of related tables

  - by Jake

  Hi, I am trying to use DataSet and DataAdapter to "filter" and "navigate" DataRows in DataTables. THE SITUATION: I have multiple logical objects, e.g. Car, Door and Hinge. I am loading a Form which will display complete Car information including each Door and their respective Hinges. In this senario, The…

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• Help with hash tables and quadratic probing in Java

  - by user313458

  I really need help with inserting into a hash table. I'm just not totally getting it right now. Could someone explain quadratic and linear probing in layman's terms? public void insert(String key) { int homeLocation = 0; int location = 0; int count = 0; if (find(key).getLocation() ==…

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• jquery ui themes and html tables

  - by oo

  is there anyway to theme an html table (css) with using the jquery css themes ? all of my components look like they belong together except for my html table which look different.

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• JPA - How to truncate tables between unit tests

  - by Theo

  I want to cleanup the database after every test case without rolling back the transaction. I have tried DBUnit's DatabaseOperation.DELETE_ALL, but it does not work if a deletion violates a foreign key constraint. I know that I can disable foreign key checks, but that would also disable the checks for…

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• Variable font height via tables in LaTeX

  - by Hooked

  I've been looking for a more elegant solution to the following typesetting problem. Consider those banners found in print media where the text is aligned like: B I G T E X T small text small text small text m o r e m e d i u m t e x t The font sizes are adjusted so that the…

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• Web form is not updating tables, why?

  - by JPJedi

  I have a web application and on page is an update page to update some profile information. Below is the code I am using to update the table. But I think it is wrong. Does anything stick out? The connection string works cause it is used to read the database to get the profile information, I just…

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• Search Multiple Tables of a Mysql Database

  - by DogPooOnYourShoe

  I have the following code: $query = "select * from customer where Surname like \"%$trimmed%\" OR TitleName like \"%$trimmed%\" OR PostCode like \"%$trimmed%\" order by Surname"; However, I have another table which I want to search from with the same paramaters(variables) as that. I…

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• MySQL Need help constructing query: join multiple tables into single row

  - by Jed Daniels

  Hello stackoverflowers, Forgive me if this question has been asked and answered, I've searched and found a few that look similar but I'm too much of a novice with SQL to adapt them to my needs. Also forgive me if I don't use the correct terminology, I know it can be annoying when someone asks…

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• Querying tables based on other column values

  - by blcArmadillo

  Is there a way to query different databases based on the value of a column in the query? Say for example you have the following columns: id part_id attr_id attr_value_ext attr_value_int You then run a query and if the attr_id is '1' is returns the attr_value_int column but if attr_id is…

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• Command line or library "compare tables" utility for SQL server with comprehensive diff output to a

  - by MicMit

  I can't find anything like that. Commercial or free ( XSQL Lite is suitable for my case and ) tools show diffs in grids with possibility to export to CSV. Also they generate sync SQL scripts when run from command line. What I need is an output as a comprehensive report ( XML , HTML )…

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• I want define tables from ER Diagram.

  - by M R Jafari

  I have a unary relationship. (Image Url : http://freezpic.com/pics/666c94955212a2f757fa25f9f7d31a5e.png) But I want define a table for person. The table has personID and personName column. What columns add it?

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• Firefox and IE - Firefox handling of <span> inside tables (html and css)

  - by jasrpg

  Hello, I am having difficulties getting a span tag to work properly inside a table. It appears as if the entire span tag is being ignored that is defined anywhere in between table tags in firefox, but in IE this shows up correctly. Maybe I am missing something, but I have created a…

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• How to improve performance of non-scalar aggregations on denormalized tables

  - by The Lazy DBA

  Suppose we have a denormalized table with about 80 columns, and grows at the rate of ~10 million rows (about 5GB) per month. We currently have 3 1/2 years of data (~400M rows, ~200GB). We create a clustered index to best suit retrieving data from the table on the following columns…

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• Free tools/libraries to compare tables with filtering in different databases and visualize/sync diff

  - by MicMit

  I am building certain GUI in C# for a content manager and looking for the tools or code snippets or open libraries ( code ideally in C# ) which allow me the following : 1. For table A in database X (test ) and table A in database Y (production) and for a simple filter ( e.g.…

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• How do I Relate these 4 Tables

  - by Baddie

  Trying to setup a simple Thread/Poll table mapping. Here is what I have: Threads table ThreadID (Primary Key/Identity Column) Polls table PollID (Primary Key, FK for ThreadID for one-to-one relation) Question PollOptions table PollOptionID (Identity/Primary Key) Text…

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• Entity framework (1): implement 1 foreign key to multiple tables

  - by Michel

  Hi, i've modeled this: i have an import table, and an import steps table import 1 .. N importsteps Now i have a table importparams, which hold key/value pairs to register all kind of info about the import or the importsteps. So i have modeled a FK in SqlServer which points…

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• SQL Server: Are temp tables or unions better?

  - by Jonathan Allen

  Generally speaking, for combining a lot of data is it better to use a temp table/temp variable as a staging area or should I just stick to "UNION ALL"? Assumptions: No further processing is needed, the results are sent directly to the client. The client waits for the…

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• How to differentiate between two similar fields in Linq Join tables

  - by Azhar

  How to differentiate between two select new fields e.g. Description c.Description and lt.Description DataTable lDt = new DataTable(); try { lDt.Columns.Add(new DataColumn("AreaTypeID", typeof(Int32))); lDt.Columns.Add(new…

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• Rails named_scope across multiple tables

  - by wakiki

  I'm trying to tidy up my code by using named_scopes in Rails 2.3.x but where I'm struggling with the has_many :through associations. I'm wondering if I'm putting the scopes in the wrong place... Here's some pseudo code below. The problem is that the…

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• Hibernate N+1 from select across multiple tables

  - by Marty Pitt

  Given the following hibernate query: String sql = "select distinct changeset " + "from Changeset changeset " + "join fetch changeset.changeEntries as changeEntry " + "join fetch changeEntry.repositoryEntity as repositoryEntity " + …

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