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  • How to properly name record creation(insertion) datetime field ?

    - by alpav
    If I create a table with datetime default getdate() field that is intended to keep date&time of record insertion, which name is better to use for that field ? I like to use Created and I've seen people use DateCreated or CreateDate. Other possible candidates that I can think of are: CreatedDate, CreateTime, TimeCreated, CreateDateTime, DateTimeCreated, RecordCreated, Inserted, InsertedDate, ... From my point of view anything with Date inside name looks bad because it can be confused with date part in case if I have 2 fields: CreateDate,CreateTime, so I wonder if there are any specific recommendations/standards in that area based on real reasons, not just style, mood or consistency. Of course, if there are 100 existing tables and this is table 101 then I would use same naming convention as used in those 100 tables for the sake of consistency, but this question is about first table in first database in first server in first application.

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  • Linq to SQL generates StackOverflowException in tight Insert loop

    - by ChrisW
    I'm parsing an XML file and inserting the rows into a table (and related tables) using LinqToSQL. I parse the XML file using LinqToXml into IEnumerable. Then, I create a foreach loop, where I build my LinqToSQL objects and call InsertOnSubmit and SubmitChanges at the end of each loop. Nothing special here. Usually, I make it through around 4,100 records before receiving a StackOverflowException from LinqToSql, right as I call SubmitChanges. It's not always on 4,100... sometimes it's 4102, sometimes, less, etc. I've tried inserting the records that generate the failure individually, but putting them in their own Xml file, but that inserts fine... so it's not the data. I'm running the whole process from an MVC2 app that is uploading the Xml file to the server. I've adjusted my WebRequest timeouts to appropriate values, and again, I'm not getting timeout errors, just StackOverflowExceptions. So is there some pattern that I should follow for times when I have to do many insertions into the database? I never encounter this exception on smaller Xml files, just larger ones.

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  • Linq to sql add/update in different methods with different datacontexts

    - by Kurresmack
    I have to methods, Add() and Update() which both create a datacontext and returns the object created/updated. In my unit test I call first Add(), do some stuff and then call Update(). The problem is that Update() fails with the exception: System.Data.Linq.DuplicateKeyException: Cannot add an entity with a key that is already in use.. I understand the issue but want to know what to do about it? I've read a bit about how to handle multiple datacontext objects and from what I've heard this way is OK. I understand that the entity is still attached to the datacontext in Add() but I need to find out how to solve this? Thanks in advance

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  • adding users, membership, and roles to site

    - by Alexander
    I have followed scott's gu tutorial here I uploaded the whole database to my site. Before doing what Scott's says I had one username stored in the membership. How can I create an additional user now that the table is in the web host? I can see that there's aspnet_Membership, aspnet_Applications, etc..etc

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  • pl/sql object types "ORA-06530: Reference to uninitialized composite" error

    - by mutoss
    hi, i have a type as follows: CREATE OR REPLACE TYPE tbusiness_inter_item_bag AS OBJECT ( item_id NUMBER, system_event_cd VARCHAR2 (20), CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT ); CREATE OR REPLACE TYPE BODY tbusiness_inter_item_bag AS CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT AS BEGIN RETURN; END; END; when i execute the following script, i got a "Reference to uninitialized composite" error, which is imho quite suitable. DECLARE item tbusiness_inter_item_bag; BEGIN item.system_event_cd := 'ABC'; END; This also raises the same error: item.item_id := 3; But if i change my object type into: CREATE OR REPLACE TYPE tbusiness_inter_item_bag AS OBJECT ( item_id NUMBER(1), system_event_cd VARCHAR2 (20), CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT ); then the last statement raises no more error (where my "item" is still uninitialized): item.item_id := 3; Shouldn't i get the same ORA-06530 error? ps: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi

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  • How to create item templates for SQL files, for Visual Studio Database Projects

    - by jonathanconway
    It's possible to define your own custom templates for normal project types, such as templates for C# files, for a Class Library project. What about a 'Database Project' scenario? I would like to define a standard template for adding a stored procedure, which uses the company's conventions for all stored procedures, such as standard comments at the top. Which folder contains Visual Studio templates for Database projects?

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  • DB comparison tools

    - by Dimi Toulakis
    Has someone experience with database comparison tools? Which one you would recommend? We are currently using "SQLCompare" from Redgate, but I am curious to know if there are better tools on the market. The main requirement is that they should be able to compare scripts folder against a live database. Thanks, Dimi

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  • DB2 SQL count in join or where clause

    - by Pat
    This is probably an amateur question but I'm an amateur ! ;o) I have several tables: Account table, Officer table, Location table, Web table... The Officer table doesn't give me the number of officers per account. I need to retrieve only the accounts that have more than 20 officers. Should I use the COUNT ? If so, how ? Your help is greatly appreciated. Thanks. Pat

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  • sql-server: how to insert to temporary table?

    - by RedsDevils
    I have one Temporary Table CREATE TABLE #TEMP (TEMP_ID INT IDENTITY(1,1)) And I would like to insert records to that table, How can I?I do as follow: INSERT INTO #TEMP DEFAULT VALUES But sometimes it doesn't work. What it might be?And I would like to know lifetime of temptable in MSSQL. Please Help me! Thanks all!

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  • How to add an additional column in a table by comparing the values in a different column

    - by S-Man
    I have a table with the following records id name city 1 aaa NY 2 bbb NY 3 ccc LA 4 ddd LA 5 eee NY I want the table with an additional column by comparing the 'city' column. The values in the col4 should have '1' for every unique value in 'city' column and '0' for the repeating values in 'city' column. id name city col4 1 aaa NY 1 2 bbb NY 0 3 ccc LA 1 4 ddd LA 0 5 eee NY 0 I hope to get some help. Thanks

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  • Which can handle a huge surge of queries: SQL Server 2008 Fulltext or Lucene

    - by Luke101
    I am creating a widget that will be installed on several websites and blogs. The widget will analyse the remote webpage title and content, then it will return relevent articles/links on my website. The amount of traffic we expect will be very huge roughly 500K queries a day and up from there. I need the queries to be returned very quickly, so I need the candidate to be high performance, similar to google adsense. The remote title can be from 5 to 50 words and the description we will use no more then 3000 words. Which of these two do you think can handle the load.

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  • SQL Join Problem

    - by Harley
    Table one contains ID|Name 1 Mary 2 John Table two contains ID|Color 1 Red 1 Blue 2 Green 2 Blue 2 Black I want to end up with is ID|Name|Red|Blue|Green|Black 1 Mary    Y      Y 2 John            Y        Y       Y Thanks for and help.

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  • Reporting on data when data is missing (ie. how to report zero activities for a customer on a given

    - by Christian Vik
    I want to create a report which aggregates the number of activities per customer per week. If there has been no activites on that customer for a given week, 0 should be displayed (i.e week 3 and 4 in the sample below) CUSTOMER | #ACTIVITIES | WEEKNUMBER A | 4 | 1 A | 2 | 2 A | 0 | 3 A | 0 | 4 A | 1 | 5 B ... C ... The problem is that if there are no activities there is no data to report on and therefor week 3 and 4 in the sample below is not in the report. What is the "best" way to solve this?

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  • Linq sql Attach, Update Check set to Never, but still Concurrency conflicts

    - by remdao
    In the dbml designer I've set Update Check to Never on all properties. But i still get an exception when doing Attach: "An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported." This approach seems to have worked for others on here, but there must be something I've missed. using(TheDataContext dc = new TheDataContext()) { test = dc.Members.FirstOrDefault(m => m.fltId == 1); } test.Name = "test2"; using(TheDataContext dc = new TheDataContext()) { dc.Members.Attach(test, true); dc.SubmitChanges(); }

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  • How to record different authentication types (username / password vs token based) in audit log

    - by RM
    I have two types of users for my system, normal human users with a username / password, and delegation authorized accounts through OAuth (i.e. using a token identifier). The information that is stored for each is quite different, and are managed by different subsytems. They do however interact with the same tables / data within the system, so I need to maintain the audit trail regardless of whether human user, or token-based user modified the data. My solution at the moment is to have a table called something like AuditableIdentity, and then have the two types inheriting off that table (either in the single table, or as two seperate tables with 1 to 1 PK with AuditableIdentity. All operations would use the common AuditableIdentity PK for CreatedBy, ModifiedBy etc columns. There isn't any FK constraint on the audit columns, so any text can go in there, but I want an easy way to easily determine whether it was a human or system that made the change, and joining to the one AuditableIdentity table seems like a clean way to do that? Is there a best practice for this scenario? Is this an appropriate way of approaching the problem - or would you not bother with the common table and just rely on joins (to the two seperate un-related user / token tables) later to determine which user type matches which audit records?

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  • How should I configure my Active Directory servers so that if one goes down, users are not kicked off SQL?

    - by Matty Brown
    Today, we shut down one of our Active Directory servers during office hours to check the loading on a UPS. Since all the server did was provide Active Directory in a separate building incase the main building caught fire, or whatever, we didn't think it would have any effect on our users. Seconds after the server was shut down, we had a dozen phone calls from users experiencing this issue:- [Microsoft SQL Server Login] SQLState: '28000' [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed. The login is from an untrusted domain and cannot be used with authentication. Once we realized what had happened, we quickly rebooted the down Active Directory server. Problem solved. But why did this happen. And what if one day a server has a breakdown and is offline for hours, or days? Shouldn't the other Active Directory servers in the domain service authentication requests without disruption to users? We have 3 Windows Server 2003 Standard servers running Active Directory as Domain Controllers with Global Catalogs, all physically located on the same network at Gigabit speeds. I believe the domain was originally Windows Server 2000, or maybe even NT 4.0. Could the issue be to down to old Group Policies inherited from these old server OS's, or some default setting in Active Directory that needs changing?

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  • Creating a User Defined function in Stored Procedure in SQL 2005

    - by NLV
    Hello, I have a stored procedure in which i want to create a user defined function - Split (splits a string separated with delimiters and returns the strings in a table), make use of the function and finally drop the function. My question is that whether i can create a user defined function inside a stored procedure and drop it finally? Thank you. Regards NLV

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