How To Choose A Primary Key

Feb 16, 2005

Hi All,

I have a dilemn:
On one side, I have a column C1 which could be a primary key because it is never null, the value is unique and identify the record. The problem is its a char type and its lenght can be close to 30.
Then, I've planned to add another column C2 of int type as PK. But then I need to add a unique constraint index on C1. Does it improve performance anyway?

Thanks

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Which To Choose....

Oct 24, 2007

I have a production server log shipping to a secondary server every 30 minutes (both SQL 2000), which the second server is used for both a warm standby server and for reporting from users. Issue: the log shipping locks the DB so reporting can't be done until the load is finished, the load to the second set of databases has taken up to 15 minutes to finish allowing the users only 15 minutes to run reports, this is not acceptable. The server also needs to be used for DR.

I am looking for another solution, I can't use Transactional Log shipping as not all of the tables in the databases have a primary key identified. So, I am looking for a real-time or near real-time reporting server that is more available to running reports and a warm standby server for Disaster recovery. I am trying to figure out what SQL Server 2000 has to provide (or even 2005 or 2008?) or I am also looking at some third party software, but not sure what is the best for a reasonable price.

Any help is appreciated.

Thanks....JB

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Index - Which 1 To Choose ?

Jul 6, 2006

good day, everyone

if i have a transaction table with fields below :

transaction_no, product_id, product_desc, product_qty, product_txn, transaction_date

can some expert here point out to me , which is the best cluster-index and non-clsuter index ?

and possible kindly please explain why is it so? i'm not good in database so just explain like to beginner

thank you very much for guidance

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May 6, 2008

(Hard to put a good subject on this one...)

I have a database containing a lot of users and these users can have four different kind of telephone numbers connected to them: "Direct phone", "Switchboard", "Cell phone", "Home phone". The phone numbers are stored in a separate table. Some users have 0 phone numbers, some have 1, some have 3 etc.

Now I have to transfer the data to another database with a strict table structure and here the table that contains the user also should contain the users phone number and an alternative phone number, if the user currently has more than one phone number connected.

This means that if for instance we have three or more phone numbers connected to one user, we can maximum transfer two of them. This is not a big issue though...

We have ranked the importance of the phone numbers in the order as I presented them above.
What I do in my T-SQL query is to do a ISNULL() and see if the user has "Direct phone" connected, if not I check for the next type and so on.

Now to my problem! Can anyone give me a suggestion of how to write the code for the extraction of the Alternative phone? What I need to do is to check if there is a "Direct phone" connected to the user, if so I should NOT chose that but the next phone number that I find.

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May 14, 2008

I'm currently developing an ASP.NET website which is using SQL Server 2005 and I couldn't decide between two table designs and I hope you can give me your opinions

The website is for a school and it'll be used to create tests from questions. The teacher will:
1. Select grade (could be multiple selection)
2. Select class
3. Select subject
The thing is that same question could be used for multiple grades.

Example query: "Get me questions of trigonometry of math from grades 7,8,9"

(Names used instead of ID's to make it more clear)
The first design:

[BigRelationsTable]
ID - QuestionID - GradeID - ClassID - SubjectID
1 - Question123 - Grade7 - Math - Trig
2 - Question123 - Grade8 - Math - Trig
3 - Question123 - Grade9 - Math - Trig

This is a simple design but all of the columns will need indexes because all of them will be used for searching and that makes me think about table performance.

Second design:
[GradeClassRelations]
ID - Grade - Class
1 - 7 - Math
2 - 8 - Math
3 - 9 - Math

[ClassSubjectRelations]
ID - GradeClassRelationsID - SubjectID
1 - GradeClassRelations1 - Trig
2 - GradeClassRelations2 - Trig
3 - GradeClassRelations3 - Trig

[SubjectQuestionRelations]
ID - ClassSubjectRelationsID - QuestionID
1 - ClassSubjectRelations1 - 1
2 - ClassSubjectRelations2 - 1
3 - ClassSubjectRelations3 - 1

This one is more normalised but this time the need of doing multiple joins makes me wonder.

What do you think? Which one should I use? Or if you have any other suggestions I'm all ears

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Dec 18, 2006

hi guys,

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Jun 7, 2006

Greetings SSIS friends

I want to implement the following query using SSIS Data flow Source component :

SELECT * FROM someTable WHERE someColumn = 'H'

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Any suggestions would be much appreciated.

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Mar 18, 2008

Hi there,

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I have attempted the connection with both the OLE DB Destination connection in SSIS and also with an ODBC connection, but both come up with the same error "ORA-12154: TNS could not resolve service name".

I am using a 32-bit version of SQL Server 2005 and the Oracle DB is 64-bit. Any ideas?

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Jan 21, 2008

Hi there,

There's a field with Varchar(5) type which contains both alpha and alpha-numeric data. When sorting based on this field 1001 comes before 101. Is there anyway I can sort it appropriately; is there any collation or something which could be used.

Result of the sort:
1001
101
102
1022
103

Thanks,
LOA

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Mar 3, 2008

I want to choose a column dynamically depending on a session variable.
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Any help is appreciated.
below is my futile attempt
 
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<SelectParameters>

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Jun 21, 2004

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Mar 22, 2006

Hi,

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express or SQL 2005 Developers Edition for the prototype/testing phase.

Any advice?  I want to build production-ready versions with easy
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thanks,
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Dec 12, 2000

I have a job that selects alot of data from one database into another.

Can I choose not to log this operation (doesn't need to be and the log fills up before it's done)

Thanks..

type of code:

Insert into database_1
Select * from database_2

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Jun 3, 2004

Hi guys!

I need to create a table always that a new register is add in TABLE_ONE

The name of this new table must by 'TABLE_' + TABLE_ONE.Cod

It will be:
TABLE_1
TABLE_2
TABLE_3
...

I know this code must be in a trigger of insert... but how? I did some tests but didnt work.

Thanks in advance.

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Aug 6, 2004

Hello, everyone:

There are some explanations on this topic from books and BOL. Could you offer the real experience? Thanks.

ZYT

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Oct 28, 2004

Hi,

I have a table with its ID field set as an Identity column with "seed" and "increment" set to 1. Now, I have rows in there that I don't want to change. I'd like the next addtitions to the table to start at a specific value for their ID columns.

Basically, how can I specify a new starting value for an identity column?

Thanks,

Skip.

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Mar 17, 2007

I have visual studio 2005 and I am going to create a web application. Which data source or data provider will I choose when I'm connecting to the database(MS SQL Server)? and how about when I create a windows application? will I use the same thing? tnx

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A Stored Procedure With More To Choose From

Dec 18, 2007

Hello all I am trying to create a stored procedure that will either give the user a chance to use the wild cards or the IR_Number, or subjLastName (from the RevisedSubjects_Table) or a begin Date and an End Date.


CREATE PROCEDURE [dbo].[AdvSrchWildCardsIR]
(@Enter_IR_Number nvarchar(100))

AS
SET @Enter_IR_Number = REPLACE(@Enter_IR_Number, '*', '%')
SELECT dbo.RevisedSubjects_Table.SubjFirstName, dbo.RevisedSubjects_Table.SubjLastName, dbo.Revised_MainTable.[Violation Type],
dbo.RevisedSubjects_Table.[IR Number], dbo.Revised_MainTable.[I/RDocument], dbo.Revised_MainTable.Date, dbo.Revised_MainTable.Action
FROM dbo.Revised_MainTable INNER JOIN
dbo.RevisedSubjects_Table ON dbo.Revised_MainTable.[IR Number] = dbo.RevisedSubjects_Table.[IR Number]



IF patindex( '*', @Enter_IR_Number) > 0

BEGIN

SET @Enter_IR_Number = replace( @Enter_IR_Number, '*', '%' )



SELECT dbo.RevisedSubjects_Table.SubjFirstName, dbo.RevisedSubjects_Table.SubjLastName, dbo.Revised_MainTable.[Violation Type],
dbo.RevisedSubjects_Table.[IR Number], dbo.Revised_MainTable.[I/RDocument], dbo.Revised_MainTable.Date, dbo.Revised_MainTable.Action

FROM dbo.Revised_MainTable INNER JOIN
dbo.RevisedSubjects_Table ON dbo.Revised_MainTable.[IR Number] = dbo.RevisedSubjects_Table.[IR Number]


END

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Sep 19, 2014

How Choose function in SQL is useful in a table. Any example with a simple table and how it can be useful for any particular column in a table

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Dec 20, 2006

Hi there

I am up against a condition where my control flow should be divided into threads and depending on value of a variable i have to choose 1 of the threads.

Its something like

if a =1 then execute this

else execute this one.



Thanks and Regards

Rahul Kumar, Software Enggineer



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Apr 22, 2008



Hello all,
I got a problem when using Sql Service 2005. I have two parameters @ID and @Name. I want to choose either and only one parameter to generate my report at one time. Could anyone tell me how to do it? I tried the "or" tab after filter tab, but it only generate the report with both @ID and @name values I gave.
Thanks in advance.

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Aug 8, 2007

Hi,

I need to be able to get the maximum value of different calculations.
Example :
i have 5 calculations like this :
(sum(Fields!CountTest1.Value)/sum(Fields!TestCount.Value))*100
(sum(Fields!CountTest2.Value)/sum(Fields!TestCount.Value))*100
(sum(Fields!CountTest3.Value)/sum(Fields!TestCount.Value))*100
(sum(Fields!CountTest4.Value)/sum(Fields!TestCount.Value))*100
(sum(Fields!CountTest5.Value)/sum(Fields!TestCount.Value))*100

these calculations give me a percentage from a test value against the total test values.

what function or expression can i use to get the max value of all the calculations ?

I was looking at the "choose" function but i'm not quite sure how...

anybody ? help ....

Vinnie

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Jun 28, 2006

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I need to rewrite this for a Script Task in SQL Server 2005 but it seems like it
doesn't have this functionality and objects.


Does anyone know how to write the code for choosing the next step in a
Script Task or knows another way to solve my problem?

The package is not suppose to fail if the file is missing, it's must succeed and that's why I need two success-paths.

Regards,
Sara


'**********************************************************************
' Visual Basic ActiveX Script
'************************************************************************
Function Main ()


Dim pkg
Dim stpContinuePkg
Dim stpExit


SET pkg = DTSGlobalVariables.Parent


SET stpContinuePkg = pkg.Steps("DTSStep_DTSActiveScriptTask_4")
SET stpExit = pkg.Steps("DTSStep_DTSActiveScriptTask_21")


If ...... Then
Main = DTSStepScriptResult_ExecuteTask
stpContinuePkg.DisableStep = False
stpExit.DisableStep = True
Else
.......
End If


Main = DTSTaskExecResult_Success


End Function

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Nov 23, 2007

Hi there,

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Please let me know.

Regards,
mkarumuru

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Jan 19, 2007

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Jul 9, 2007

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ideas?
 
End If

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Apr 15, 2006

Hello everyone
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Apr 22, 2007

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Laura Lerner

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Jun 7, 2007

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I could create 4 separate reports with 4 separate datasets, or one report with 4 datasets, or is there some reasonable way I can tweak the MDX for a dataset on the fly, e.g. "search and replace, find MTD replace with QTD" &c &c.



Cheers,



JG







WITH

MEMBER [MEASURES].[WT TO MTD]

AS SUM(MTD([Time].[Year - Quarter - Month - Date].CURRENTMEMBER)

,[Measures].[TURNOVER])

MEMBER [MEASURES].[WT TO MTD PrEq]

AS SUM(MTD(parallelperiod([Time].[Year - Quarter - Month - Date].[Month] ,1

,[Time].[Year - Quarter - Month - Date].CURRENTMEMBER))

,[Measures].[TURNOVER])

MEMBER [MEASURES].[WT TO MTD Vs PrEq]

AS IIF([MEASURES].[WT TO MTD PrEq]=0, null

,([MEASURES].[WT TO MTD] / [MEASURES].[WT TO MTD PrEq])-1), format='0.00%'

MEMBER [MEASURES].[WT TO MTD Rank]

AS RANK([SECTOR3].[SECTOR3 ID].CurrentMember

,[SECTOR3].[SECTOR3 ID].[SECTOR3 ID].ALLMEMBERS,

[Measures].[WT TO MTD])

MEMBER [MEASURES].[WT TO MTD PrEq Rank]

AS RANK([SECTOR3].[SECTOR3 ID].CurrentMember

,[SECTOR3].[SECTOR3 ID].[SECTOR3 ID].ALLMEMBERS,

[Measures].[WT TO MTD PrEq])

MEMBER [MEASURES].[WT TO MTD Vs PrEq Rank]

AS RANK([SECTOR3].[SECTOR3 ID].CurrentMember

,[SECTOR3].[SECTOR3 ID].[SECTOR3 ID].ALLMEMBERS,

[Measures].[WT TO MTD Vs PrEq])

SELECT NON EMPTY { [Measures].[WT TO MTD]

, [Measures].[WT TO MTD PrEq]

, [MEASURES].[WT TO MTD Vs PrEq]

, [MEASURES].[WT TO MTD Rank]

, [Measures].[WT TO MTD PrEq Rank]

, [MEASURES].[WT TO MTD Vs PrEq Rank]

} ON COLUMNS,

NON EMPTY { order([SECTOR3].[SECTOR3 ID].[SECTOR3 ID].ALLMEMBERS,[MEASURES].[WT TO MTD Vs PrEq], bdesc) } ON ROWS

FROM [WmCube4]

where [TIME].[Date].&[2007-06-04T00:00:00]

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Aug 9, 2007

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The report is exported to a PDF

The report opens in Adobe Acrobat

The report is formatted on the screen to fit 8.5" x 14" paper (legal)

When "Print" is selected, the Preview has it on 8.5" x 11" paper (letter)

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Mar 9, 2007

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