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• Best way to get record counts grouped by month, adjusted for time zone, using SQL or LINQ to SQL

  - by Jeff Putz

  I'm looking for the most efficient way to suck out a series of monthly counts of records in my database, but adjusting for time zone, since the times are actually stored as UTC. I would like my result set to be a series of objects that include month, year and count. I have LINQ to SQL objects that looks something like this: public class MyRecord…

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• how to insert record in database with each date of month on single button click ?

  - by Mr. Goo

  I have two textbox .... textbox1 and textbox2 textbox1 == choose from date textbox2 == choose to date if user select from date in textbox1 as 01-May-2011 and in textbox2 as 30-May-2011 then all the dates from 01-MAy-2011 to 30-May-2011 will be inserted in each row of mssql2005 datatable... example. . : IN database Table1 structure ... ID …

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• How can I update a record using a correlated subquery?

  - by froadie

  I have a function that accepts one parameter and returns a table/resultset. I want to set a field in a table to the first result of that recordset, passing in one of the table's other fields as the parameter. If that's too complicated in words, the query looks something like this: UPDATE myTable SET myField = (SELECT TOP 1 myFunctionField …

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• Is There a way to update/refresh only one record in delphi dbgrid?

  - by O Engenheiro

  Is it possible? How?

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• How can I override the attribute assignment in an active record object?

  - by ryeguy

  I know you can do this with virtual attributes, but what if the column actually exists? For example, my model has a raw_topic column. When raw_topic is set, I want artist and song_title to be set based off of raw_topic's contents. Ideally, I'd like to override the raw_topic= method, but rails doesn't seem to like that. What's the proper way of…

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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.…

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• Saving an active record, in what order are the associated objects saved?

  - by Bryan

  In rails, when saving an active_record object, its associated objects will be saved as well. But has_one and has_many association have different order in saving objects. I have three simplified models: class Team < ActiveRecord::Base has_many :players has_one :coach end class Player < ActiveRecord::Base belongs_to :team …

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• How to find all records that share the same field value as some other record?

  - by Gj

  I need to extract all records which have a field which does NOT have a unique value. I can't figure out an elegant way to do it - using annotation or some other way. I see a "value_annotate" method to the object manager but it's unclear if it's at all related. Currently I'm using the inelegant way of simple looping through all values…

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• Hibernate: getting a record but it's being updated in the database?

  - by jack

  For some reason Hibernate seems to be keeping my session open and updating the object without me explicitely invoking a save/update/saveorupdate. I guess the session is staying open and it's beeing marked as dirty. However this is not the desired behaviour, so what's the cleanest way to fix this? The issue seems to occur because I…

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• My Linq to Sql Insert code seems to work fine but I don't get a record in the database

  - by Alex

  Here is my code. In the debugger, I can see that the code is running. No errors are thrown. But, when I go back to the table, no row has been inserted. What am I missing?? protected void submitButton_Click(object sender, EventArgs e) { CfdDataClassesDataContext db = new CfdDataClassesDataContext(); string sOfficeSought =…

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• How to block the possibility to add the same record to a SPList?

  - by truthseeker

  Hi, Is there a possibility to block chance to add the same data to SPList? I know that two records always are different regarding the ID field. I would like to validate other custom fields added previously by me, and don't allow of adding same field's value. Can anybody tell me how to implement this? I can guess that event…

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• How to do an additional search on archive in rails if record not found, by extending model?

  - by Nick Gorbikoff

  Hello, I was wondering if somebody knows an elegant solution to the following: Suppose I have a table that holds orders, with a bunch of data. So I'm at 1M records, and searches begin to take time. So I want to speed it up by archiving some data that is more than 3 years old - saving it into a table called…

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• Fetching a random record from the Google App Engine Datastore?

  - by demos

  I have a datastore with around 1,000,000 entities in a model. I want to fetch 10 random entities from this. I am not sure how to do this? can someone help?

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• Is it possible to use SQL XML to insert, and get output from each record?

  - by nbolton

  I would like to perform a SQL XML insert (on MSSQL), and in this case I need to insert a list of files into the DB (this is simple enough). However, there's an auto generated PK column (ID), and I need the ID for each newly created filename without performing a 2nd query. Is this possible? I guess it doesn't…

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• Active Record Associations: has_one :through? Or multiple has_one's?

  - by jmccartie

  I'm brand new to Rails, so bear with me. I have 3 models: User, Section, and Tick. Each section is created by a user. My guess with this association: class Section < ActiveRecord::Base has_one :user end Next, each user can "tick" off a section -- only once. So for each tick, I have a section_id,…

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• rails 3, active record: any way to tell how many unique values match a "x LIKE ?" query

  - by jpwynn

  I have a query to find all the phone numbers that match a partial expression such as "ends with 234" @matchingphones = Calls.find :all, :conditions => [ "(thephonenumber LIKE ?)", "%234"] The same phone number might be in the database several times, and so might be returned multiple times by this…

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• Should nested attributes be automatically deleted when I delete the parent record?

  - by brad

  I'm playing around with nested forms in attributes and have a model Invoice that has_many invoice_phone_numbers. I have the following line in my invoice.rb model file accepts_nested_attributes_for :invoice_phone_numbers, :allow_destroy => true, :reject_if => proc { |attrs| attrs.all? { |k, v|…

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• How does object of sub-class record information about its super-class the in a Virtual Inheritance

  - by Summer_More_More_Tea

  Hi there: I encounter this problem when tackling with virtual inheritance. I remember that in a non-virtual inheritance hierarchy, object of sub-class hold an object of its direct super-class. What about virtual inheritance? In this situation, does object of sub-class hold an object of its…

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• how to display the list of records in the same form page below form, as every time record is submitt

  - by OM The Eternity

  I have a form with 3 text values and one image.. I want to save these values such that i can display these records in the list below.. hoe can i do that... I am using osCommerce

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• How do I select a random record efficiently in MySQL?

  - by user198729

  mysql> EXPLAIN SELECT * FROM urls ORDER BY RAND() LIMIT 1; +----+-------------+-------+------+---------------+------+---------+------+-------+---------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra …

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• How to fetch a random record from SQLite database?

  - by Bruce

  I am working on PHP. I was working with MySQL before. Here is the code I used - $offset_result = mysqli_query($con, " SELECT FLOOR(RAND() * COUNT(*)) AS `offset` FROM students "); $offset_row = mysqli_fetch_object( $offset_result ); $offset = $offset_row->offset; $result =…

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• How can I get FOUND_ROW()s from an active record object in rails?

  - by Justin Tanner

  When querying the database with: @robots = Robot.all(:limit => 50, :offset => 0) What is the best way to get the total number of rows without the :limit? In raw MySQL you could do something like this: SELECT SQL_CALC_FOUND_ROWS * FROM robots LIMIT 0, 50 SELECT…

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• How do I return the IDENTITY for an inserted record from a stored Proecedure?

  - by user54197

  I am adding data to my database, but would like to retrieve the UnitID that is Auto generated. using (SqlConnection connect = new SqlConnection(connections)) { SqlCommand command = new SqlCommand("ContactInfo_Add", connect); command.Parameters.Add(new…

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• Set to null a parent record so that children are removed: howto?

  - by EugeneP

  How to delete a child row (on delete cascade ?) when setting a null value on a parent? Here's the db design. table A [id, b_id_1, b_id_2] table B [id, other fields...] b_id_1 and b_id_2 can be NULL if any of them is null, it means NO B records for…

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• What's the easiest and safest way to record data being inputted by a user on a web site

  - by fred august

  Apologies, this is a tragically simple question that will bore most of you. I need to implement the simplest "leave your email and we'll contact you" web page. The simplest thing I could think of is doing an HTML form which calls a PHP script which…

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