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Search found 7127 results on 286 pages for 'calculated columns'.

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• Django - 2 fields unique together

  - by webvulture

  Suppose, I want to record say poll choices by users everyday. In this case, i have a table named vote which has columns poll , choice and user-id . So how can i out the constraint (maybe in the django models or wherever possible) that poll and user-id both should not be the same for any entry but like the same user can vote for various different polls once and obviously various users can vote for the same poll. I hope I am clear.

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• ASP.net C# Add controls automatically to a data form

  - by user333817

  I am using ASP.net with C# and am looking for a tool that given a SQL table name, reads the table columns and populates an aspx form with controls (textboxes with matching labels). Something like ComponentOne InputPanel, except that this product only works for WinForms. See demo of ComponentOne InputPanel: http://www.componentone.com/newimages/Products/Videos/StudioEnterprise/InputPanel/ComponentOneInputPanel.html

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• How efficient is a details table?

  - by Jeffrey Lott

  At my job, we have pseudo-standard of creating one table to hold the "standard" information for an entity, and a second table, named like 'TableNameDetails', which holds optional data elements. On average, for every row in the main table will have about 8-10 detail rows in it. My question is: What kind of performance impacts does this have over adding these details as additional nullable columns on the main table?

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• swing layout: vertical flow

  - by pstanton

  Hi All, What LayoutManager should I use to achieve a transposed version of FlowLayout? Essentially, I want a vertical list which occupies multiple columns if it can't fit all of it's components within one column. +------------------------+ | item 1 | | item 2 | | item 3 | | item 4 | | item 5 | | item 6 | | item 7 | | item 8 | +------------------------+ or +------------------------+ | item 1 item 7 | | item 2 item 8 | | item 3 | | item 4 | | item 5 | | item 6 | +------------------------+

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• Can MySQL do row level security or what Oracle calls virtual private databases?

  - by JavaRocky

  Does MySQL have any equivalent feature to Oracle's virtual private databases in 10g. It is also known as row level security. I prefer not to implement anything like columns and triggers. I am looking for a solution similar to Oracle's.

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• How to add a property table to a form in Visual Studio?

  - by roddik

  Hi. I don't have much experience with C# or VS, but I want to add a property table to a form, like this one: So that columns are resizable, editable, of different types (e.g. checkbox for boolean) and sortable. How do I do that?

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• Change the Default Size of the filterBy text box in Rich Table

  - by Nisansala

  How can I change the Default Size of the filterBy text box in Rich Table? In all the columns, it has a same (fix) size. I used the property width, but it didn't work.

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• Question on XJB

  - by Hima

  I have two tables -- INSTALL_BUILD_RESULTS and BUILD_RESULTS. IBR has a primary key called Install_Build_Id and BR has a primary key called Build_Id. Both are numbers A third table, LINK_BUILD_TO_INSTALL_BUILD is a table simply consisting of the two columns mentioned above, used together as a composite key. How can I write an xjb for these 3 tables.

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• SQL Server 2008 management studio drop tables warning?

  - by Curtis White

  Why does SQL server 2008 always warn about needing to drop tables to rename columns? I was under impression this was not required unless it was a key. If I change a column from null to not null even if is not a key field it wants to drop table and all relations.

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• MySQL How to select friends from a friendship table?

  - by Thomas Puthoor

  Hi I have a simple database for storing friendship, with just two columns person_a, person_b , denoting that person_a and person_b are friends. From a big list like this what query should I run to get say get all friends of 'sam'. Thank you.

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• Find all the varchar() fields in sql server?

  - by JD

  Hi, Is it possible to find all the varchar() columns in my database? I am using SQL Server 2008 and would like to get the list in SQL server management console. JD.

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• How to access Excel Max Column value?

  - by Phsika

  i try to create table from excel rows. however; excel columns : column1 has max 200 character row column2 has max 300 character row column3 has max 500 character row So i need to create sql create MyTable column3 nvarchar(500) according to Excel Max Character.

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• How does Zend_Db_Table_Select work?

  - by jwhat

  I'm trying to figure out how to use Zend_Db_Table_Abstract correctly. I want to return just the name column from my query. Can you please explain what's wrong with the following code? class Model_DbTable_Foo extends Zend_Db_Table_Abstract { protected $_name = 'foo'; public function getFooById($id) { $select = $this->select(true)->columns('name')->where('id=' . $id); $row = $this->fetchRow($select); print_r($row->toArray()); } }

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• Is it bad to have a non-clustered index that contains the primary key from the clustered index?

  - by Don

  If you have a table with a clustered index on the Primary Key (int), is it redundant and bad to have one (ore more) non-clustered indexes that include that primary key column as one of the columns in the non-clustered index?

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• SQL-wrappers (activerecord) to recommened for python?

  - by Horace Ho

  is there an activerecord (any similar SQL-wrapper) for python? which is good for: used in a server-side python script light-weight supports MySQL what I need to do: insert (filename, file size, file md5, the file itself) into (string, int, string, BLOB) columns if the same file (checksum + filename) does not exist in db thx

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• Evaluate column value into rows

  - by Hugo Palma

  I have a column whose value is a json array. For example: [{"att1": "1", "att2": "2"}, {"att1": "3", "att2": "4"}, {"att1": "5", "att2": "6"}] What i would like is to provide a view where each element of the json array is transformed into a row and the attributes of each json object into columns. Keep in mind that the json array doesn't have a fixed size. Any ideas on how i can achieve this ?

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• MySQL: Update table column from subquery result

  - by Jhourlad Estrella

  On the Members table are columns "MemberID" and "PointsEarned". I want to update the PointsEarned column from the result of this query: SELECT m.MemberID, m.UserName, ( (SELECT COUNT(*) FROM EventsLog as e WHERE e.MemberID=m.MemberID AND e.EventsTypeID=2)*10 ) + ( (SELECT COUNT(*) FROM EventsLog as e WHERE e.MemberID=m.MemberID AND e.EventsTypeID=3)*3 ) + ( (SELECT COUNT(*) FROM ChatMessages as c WHERE c.MemberID=m.MemberID)*.1 ) as PointsEarned FROM Members as m Can anybody tell me how I should do it with a single query? Thanks!

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• jquery column values on click..

  - by rockers

  Hello all, I have a table with 5 columns,,when I click on first column on the row i need to get the all column row values using jquery? Thanks

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• How to display a mysql table data in another language properly in php

  - by Shinigami

  i have a mySQL table which the data in one of its columns is in a language other than English.(Persian) when i input data in the table , it is shown properly but when i want to show the data in a php file it displays like this:???? well,what should i do in order to show the data in its correct form?

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• How to define a class with variable properties?

  - by user1723326

  I'm making a database program. I want the user to be able to define their own columns, as many as they want. How would I then define each record in its class file?(Since the properties would be different user to user) EDIT: It's part of a school assignment-it's going to hold different scores and the likes for the teacher for different students they can add, but they will also be able to add a new assignment, test(a column) .

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• Create comma separated string from 2 lists the groovy way

  - by Micor

  What I have so far is: def imageColumns = ["products_image", "procuts_subimage1", "products_subimage2", "prodcuts_subimage3", "products_subimage4"] def imageValues = ["1.jpg","2.jpg","3.jpg"] def imageColumnsValues = [] // only care for columns with values imageValues.eachWithIndex { image,i -> imageColumnsValues << "${imageColumns[i]} = '${image}'" } println imageColumnValuePair.join(", ") It works but I think it could be better. Wish there was a collectWithIndex ... Any suggestions?

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• Getting a count of users each day in Mondrian MDX

  - by user1874144

  I'm trying to write a query to give me the total number of users for each customer per day. Here is what I have so far, which for each customer/day combination is giving the total number of user dimension entries without splitting them up by customer/day. WITH MEMBER [Measures].[MyUserCount] AS COUNT(Descendants([User].CurrentMember, [User].[User Name]), INCLUDEEMPTY) SELECT NON EMPTY CrossJoin([Date].[Date].Members, [Customer].[Customer Name].Members) ON ROWS, {[Measures].[MyUserCount]} on COLUMNS FROM [Users]

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• Dynamic ORDER BY in SQL Server

  - by BrunoLM

  I saw some topics about this, but the problem is that the solutions required a "switch case"... Like this I have a table with a lot of columns, is there a way to do a dynamic sort without the switch?

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• How can i create a context menu in c# in a datagridview

  - by lanoxx

  Hi all, I have written a datagridview with a couple of columns to store data of a product, now i want to be able to right click any row and have a context menu appear with the options delete and copy. Copy should have the same functionality as if I press Ctrl+C. Any help would be appreciated. Im using C# and WinForms. I have never done context menus before, so I would be thank full for any hint or link to further readings. Cheers

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• DataGridView formatting

  - by Vadim

  I have a DGV with columns "code" and "name". Depends of lenght of a code I want to add tabulation to the "name" cells, to show structure of a data. Like that in this picture: How is it better to do? I think there is a better way then just loop for all rows and add spaces in front of names, right?

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