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  • What could be the Consequence of inserting "id" in any autoincrementing 'id' containing table?

    - by Parth
    What could be the Consequence of inserting "id" in any autoincrementing 'id' containing table? If I have a Tabe in which I have configured the column "id" as the auto incrmented, But still I am using an INSERT query in which id is defined, like wise INSERT INTO XYZ (id) values ('26'); How does it going to effect the table and the process related to it.. Is it "no issues" to do this? or it should be avoided?

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  • Group mysql query by 15 min intervals

    - by gsiener
    I've got a monitoring system that is collecting data every n seconds (n ~=10 but varies). I'd like to aggregate the collected data by 15 minute intervals. Is there a way to corral the timestamp column into 15 minute chunks to allow for grouping to work?

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  • MySQL - generate numbers for a group of results

    - by FreeIX
    I need a query to return this result: +---------+-----+-------+ | ref_nid | nid | delta | +---------+-----+-------+ | AA | 97 | 1 | | BB | 97 | 2 | | CC | 97 | 3 | | DD | 98 | 1 | | EE | 98 | 2 | | FF | 98 | 3 | +---------+-----+-------+ However, I do not have the delta column. I need to generate it for each nid group. In other words, I need an auto incremented number for each group of the result.

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  • Hibernate violation error

    - by sarah
    Hi All, I am having a designation table with d_name as primary key which i am using in user table as foreign key reference .I am using hbm for mapping in designation hbm i have id defined as d_name mapped to database column .I am getting a error saying "integrity constraint violation(user_designation_fk) parent key not found. " Where am i going wrong /this error is coming while i am tring to add a user selecting a designation reading from designation table.

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  • How can this SQL be wrong? What am I not seeing?

    - by ropstah
    Can anybody please spot my error, this should be a legal query in SQL shouldn't it?? Unknown column u.usr_auto_key in the ON clause This is the database schema: User: (usr_auto_key, name, etc...) Setting: (set_auto_key, name etc..) User_Setting: (usr_auto_key, set_auto_key, value) And this is the query... SELECT `u`.`usr_auto_key` AS `u__usr_auto_key`, `s`.`set_auto_key` AS `s__set_auto_key`, `u2`.`usr_auto_key` AS `u2__usr_auto_key`, `u2`.`set_auto_key` AS `u2__set_auto_key`, `u2`.`value` AS `u2__value` FROM `User` `u`, `Setting` `s` LEFT JOIN `User_Setting` `u2` ON `u`.`usr_auto_key` = `u2`.`usr_auto_key` WHERE (`s`.`sct_auto_key` = 1 AND `u`.`usr_auto_key` = 1 AND admin_property is null)

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  • How do I map to a parent or child in the same table with NHibernate?

    - by adolfojp
    Lets suppose that I have a Category table with a column that holds the id of a parent or child category from the same table. This design would allow me to have unlimited levels of Categories, or unlimited levels in a thread, for example. How can I map this relationship with NHibernate? Are there any disadvantages or warnings that I should take into consideration when doing this?

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  • Is it a good practice to have trim in setter?

    - by zibi
    I'm doing a code review and I noticed such a code: @Entity @Table(name = "SOME_TABLE") public class SomeReportClass { @Column(name = "REPORT_NUMBER", length = 6, nullable = false) private String reportNumber; ..... public String getReportNumber() { return reportNumber; } public void setReportNumber(String reportNumber) { this.reportNumber = StringUtils.trimToNull(reportNumber); } } Every time I see trimming inside of a setter I feel that its not the clearest solution - what is the general practice with that issue?

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  • Best index(es) to use for an OR Statement in SQL Server

    - by Chuck Haines
    I have a table which has a bunch of columns but the two relevant ones are: Due_Amount MONEY Bounced_Due_Amount MONEY I have a SQL query like the following SELECT * FROM table WHERE (Due_Amount 0 OR Bounced_Due_Amount 0) Would the best index to put on this table for SQL Server 2008 be an index which includes both columns in the index, or should I put an separate index on each column?

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  • Records featch for DataTable

    - by Ravi
    Hi, I have added 1000 records into DataTable using C#.Net. This data table contains TimeStamp column for specified data stored time. Data stored into 10.00AM to 11.00AM every 10 seconds once. Here i want to featch only 10.15AM to 10.30AM records using C#. Thanks

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  • Select random line in SQL database

    - by Jensen
    Hi, I would like to select a random line in my database. I saw this solution on a website: SELECT column FROM table ORDER BY RAND() LIMIT 1 This SQL query run but someone said me that it was a non performant query. Is there another solution ? Thx

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  • Adding a control in Datagridview

    - by sameer
    How to add a control in DataGridView? Using Button event. For example i want to create a new a row and column in DataGridView, this i want to happen through button control. How can i do it? I am using C#.net and MS-Access.

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  • NULL value in :conditions =>

    - by Horace Ho
    Contract.all(:conditions => ['voided == ?', 0]).size => 364 Contract.all(:conditions => ['voided != ?', 0]).size => 8 Contract.all.size => 441 the 3 numbers does not added up (364 + 8 != 441). What's the proper way write the :conditions to count the rows which the voided column value is NULL or equal to zero?

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  • On Update: Auto Update Date/Time Field

    - by Abs
    Hello all, Is there an equivalent of MySQLs on update field for SQL server? With both DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP clauses, the column has the current timestamp for its default value, and is automatically updated. What I am looking for is to have a date/time field and every time I update a record it updates the field with the date/time it was updated automatically? If it doesn't exist, I guess I'll have to go manual. Thanks all

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  • Show Detailed Error in SQL Profiler

    - by AlwaysBeCoding
    Is there any way showing the detailed exception for String or binary data would be truncated. I use LINQ to SQL and i cant figure out which column is that!? Tried numerous things but i get the same meaningless error i got from within Visual Studio. Also I use .NET 3.5 SP1, but errors are still returned useless.

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  • Conversion failed when converting the varchar value to data type int

    - by desi
    *I have a varchar(1000) column declared as field that contains all numbers, as shown below. And I want to execute the following script. I need this to work please Declare @PostalCode varchar(1000)=0 set @PostalCode ='7005036,7004168,7002314,7001188,6998955' Select hl.* From CountryLocation cl INNER JOIN refPostalCodes pc ON pc.PostalCode = hl.PostalCode where pc.Postalcode in (@PostalCode) and pc.notDeleted = 1

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  • Looking for a specific python gui module to perform the following task

    - by Sadaf Amouz
    I am looking for a GUI python module that is best suited for the following job: I am trying to plot a graph with many columns (perhaps hundreds), each column representing an individual. The user should be able to drag the columns around and drop them onto different columns to switch the two. Also, there are going to be additional dots drawn on the columns and by hovering over those dots, the user should see the values corresponding to those dots. What is the best way to approach this?

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  • scaffold does not update view

    - by doemsche
    Hi there I have a question to the following procedure: script/generate scaffold product title:string description:text db:migrate #then I generate a migration which adds a column description to the table products and migrate the db again. My question is: why is the field description not added to the project-views? Is that normal rails scaffold behaviour? I think I saw in a video tutorial that the scaffold updates as well the views, which would be very convenient. Thanks in advance for any help!

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  • ImageButton not aligning to center.

    - by ProfK
    Given the following markup for a GridView column, why are my image buttons showing up as left aligned? <ItemStyle HorizontalAlign="Center" Width="55px" /> <ItemTemplate> <asp:ImageButton ID="removeButton" runat="server" ImageUrl="~/Images/Icons/x-m.png" CommandArgument='<%# Eval("ResourceId") %>' AlternateText="Remove Button" onclick="removeButton_Click" /> </ItemTemplate>

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