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Published on 2010-05-20T22:21:25Z
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2010/05/21
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When i should use primary key or index?
Which are the differences between primary key and index and which is the best?
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Concatenating string is one of the most common tasks in SQL Server and every developer has to come across it. We have to concat the string when we have to see the display full name of the person by first name and last name. In this video we will see various methods to concatenate the strings. SQL…
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Earlier this week, I was delivering Advanced BI training on the subject of “SQL Server 2008 R2″. I had great time delivering the session. During the session, we talked about SQL Server 2010 Denali. Suddenly one of the attendees suggested his displeasure for the product. He said, even though…
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I am trying to install SQL Server on Windows 2012. I was able to finally get the wizard up and running after making some changes on the server, but now it fails no matter what I do with the following error:
TITLE: SQL Server Setup failure.
SQL Server Setup has encountered the following error:
…
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I need to detect which version of SQL I am dealing with to perorm various tasks, I need specifically detect if I am on SQL 2008 or SQL Azure.
How can I do this with detection code written in SQL?
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Here is the query:
INSERT INTO @TempTable
SELECT UserID,
Name,
Address1 =
(SELECT TOP 1 [Address] FROM
(SELECT TOP 1 [Address] FROM [UserAddress] ua INNER JOIN UserAddressOrder uo ON ua.UserID = uo.UserID WHERE ua.UserID = u.UserID
ORDER BY uo.AddressOrder ASC) q
ORDER BY AddressOrder…
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Primary key attractiveness
I have a boss(and also users) that wants primary key to be sophisticated/smart/attractive control number(sort of like Social Security number, or credit card number format)
I just padded the primary key(in Views) with zeroes to appease their desire to make the control number…
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Can a compound key be set as a primary key to another table?
For instance i have the tables:
Books -with Primary Key:Product_ID
Client -with Primary key: Client_ID
Clients_Books -with Compound Primary Key:Product_Id and Client_ID
I want to set this compound Primary key from Clients_Books as…
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I have two Oracle questions.
How can I set the primary key of a table when the table is made up of an object type? e.g.
CREATE TABLE object_names OF object_type
I have created a Varray type,
CREATE TYPE MULTI_TAG AS VARRAY(10) OF VARCHAR(10);
but when I try to do
SELECT p.tags…
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Hey guys, my goal is create an EntityManager using properties dependent on which database is in use. I've seen something like this done in all my Google searches(I made the code more basic for the purpose of this question):
@PersistenceUnit
private EntityManagerFactory emf;
private EntityManager…
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I have a existing parent-child relationship I am trying to map in Fluent Nhibernate:
[RatingCollection] -- [Rating]
Rating Collection has:
ID (database generated ID)
Code
Name
Rating has:
ID (database generated id)
Rating Collection ID
Code
Name
I have been trying to figure out which permutation…
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