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Category Archives: Business Intelligence

MDX and DAX Query Formatter …. is back :)

Hi Friends,
Just to share with you quickly that “MDX and DAX Query Formatter” site is back online.

Here is the link: http://formatmdx.azurewebsites.net/

Thanks, Khilit

 

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Recover Backed-up query files in SQL Server Management Studio

Hi guys,

I just want to share quickly very handy tip regarding your SQL query sessions. When you open SQL queries in SSMS, you generally go on and work in newly opened pane/window but sometimes dont save that work.

SSMS by default saves them in the event of pre-mature closure or crash of SSMS or PC restart etc. You can find your SQL queries from following lcoation.

C:\Users\<UserName>\Documents\SQL Server Management Studio\Backup Files\Solution1

FYI, I have found my queries here:

SQL_Queries

P.S. I am using Windows Server 2008 Operating System. This path could vary based on the Operating System. You can figure it out for sure :)

I hope you find this interesting and helpful.

Thanks, Khilit

 

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Retrieving id of inserted record: What to use @@IDENTITY or SCOPE_IDENTITY() or OUTPUT

Hi guys,
This seems very basic information but need to know properly.

Issue:
I need to find out or have the id of the records which I inserted in table.

Analysis:
This requirement seems very simple but there could be various cases where you would not get the correct id just by using @@IDENTITY function.

Think of the case where you are inserting a record in table A and there is a trigger which fires as soon as there is a insert in table A which insert a record in table B. so in such case @@IDENTITY wont give you the correct id/pointer of inserted record.

So to deal with this issue you can use SCOPE_IDENTITY(). You will always get the last value you have inserted in table. However, it is noticed that sometimes in some scenarios SCOPE_IDENTITY() does not promise the correctness of results. May be due to parallelism or multiple inserts or bulk inserts in table(s). E.g. when you do … Insert Into Select <columns> from Table

Well, Microsoft recommends that “You do not use either of these functions in your queries when parallel plans are involved as they are not always reliable. Instead use the OUTPUT clause of INSERT statement to retrieve the identity value“.

Check out MS articles:
http://support.microsoft.com/default.aspx?scid=kb;en-US;2019779
http://msdn.microsoft.com/en-us/library/ms177564.aspx

I hope this will help you somewhere.
Thanks, Khilit

 

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The Story of Precision, Scale, and Length in SQL Server

Hi guys,

Did you ever faced issues with BIG mathematical figures – related to either overflow or any  other arithmetic errors. This may be applicable to SQL arithmetic operations or arithmetic  operations you do with SQL table in SSIS etc.

Well, check 1 more time, if you have any issues in your database design related to column  data type which stores the BIG numbers.

I ran into this issue couple of times, and reason behind this issue was same all the time. So  decided to do a quick post. And that reason is “Improper or insufficient precision, scale and length defined for storing Decimals and Numeric values in table“.

I wanted to describe this with an example but there is already a very nice explanation by MSDN  on this topic. Check out: http://msdn.microsoft.com/en-us/library/ms190476.aspx

You will notice in this article that, how any arithmetic operation will affect size and space  allocation of the resultant value during mathematical operation. You should use following shown table for defining and designing tables in such a way that can  handle BIG mathematical figures during operations.

From MSDN, for your quick view:

Operation

Result precision

Result scale *

e1 + e2 max(s1, s2) + max(p1-s1, p2-s2) + 1 max(s1, s2)
e1 – e2 max(s1, s2) + max(p1-s1, p2-s2) + 1 max(s1, s2)
e1 * e2 p1 + p2 + 1 s1 + s2
e1 / e2 p1 – s1 + s2 + max(6, s1 + p2 + 1) max(6, s1 + p2 + 1)
e1 { UNION | EXCEPT | INTERSECT } e2 max(s1, s2) + max(p1-s1, p2-s2) max(s1, s2)
e1 % e2 min(p1-s1, p2 -s2) + max( s1,s2 ) max(s1, s2)

* The result precision and scale have an absolute maximum of 38. When a result precision is greater than 38, the corresponding scale is reduced to prevent the integral part of a result from being truncated.

Important Note: Don’t forget to check for your SQL Server Version.

I hope you will find this informative.
Thanks, Khilit

 

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Tracking Down Ghost Characters: WHERE Clause Does Not Work Properly In T-SQL Query

Hi guys,
I would like to share an experience with you when I was working on 1 SSIS related issue.

Scenario was:
I have to exclude some records from Table A by matching some keys of Table B.

 Table A

Year Month CustomerCode <Extra Columns>
2012 JAN CX1000  
2012 JAN CX2000  
2012 JAN CD3000  

 

 Table B

Year Month RecCustomerCode <Extra Columns>
2012 JAN CX1000  
2012 JAN CX7000  
2012 JAN CD8000  

 

 What is expected was – Table A’s following records:

Year Month CustomerCode <Extra Columns>
2012 JAN CX2000  
2012 JAN CD3000  

  Read the rest of this entry »

 

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MSSQL: Find total records of each Table in given Database

hi guys,
i wanted to do a quick post on how you can find total number of records in each table of the database.

here is the script you can use:

USE <Your Database Name>
GO

;WITH CTE_DATABASETABLESIZE (DATABASENAME, SCHEMANAME, TABLENAME, TOTALROWS)
AS
(
SELECT
 DB_NAME(), SCHEMA_NAME(SO.UID), SO.NAME, SI.ROWS
FROM
 SYSOBJECTS SO
 INNER JOIN SYSINDEXES SI
 ON SO.ID = SI.ID
WHERE
 TYPE = ‘U’ AND SI.INDID IN (0,1)
)

SELECT * FROM CTE_DATABASETABLESIZE
/*ORDER BY SCHEMANAME
    ORDER BY TOTALROWS ASC*/
ORDER BY TOTALROWS DESC

Note: Customize this query according to your needs :)

Thanks, Khilit

 

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Microsoft SSAS Solution: Cube Design Considerations

Hi guys,
today i read James Serra’ post – whether 1 single BIG cube is good as comapred to multiple small cubes. Check out the advantages and disadvantages with both design approaches. he made a pretty nifty list of both of these.

i would also recommend you to read this post.
here is the link: http://www.jamesserra.com/archive/2013/01/ssas-one-giant-cube-or-many-small-ones

i hope you also find this interesting.
thanks, khilit

 

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User ‘Domain\User’ does not have required permissions. Verify that sufficient permissions have been granted and Windows User Account Control (UAC) restrictions have been addressed.

Hi guys,
its seems like this issue have been faced by many prople. i have checked the solutions on web and found that not all answers contains the complete solution. so decided to put 1 complete solution here.

in most of the places, you will find answers like… Run IE as Administrator -> Open Report Manager site -> Add your user in “System Role Assignment” (settings) etc.

But there is tini-tiny step you have to do before you run your IE as Administrator.

  • Open your IE -> Tool -> Internet Options.
  • Security tab -> Local intranet -> Sites -> Advanced -> Add your root level site here.
  • Advanced tab -> Make sure you have checked (selected) the item “Enable Integrated Windows Authentication*” under Security category.

thats it.

now are you ready to follow … Run IE as Administrator etc.
Here is the what you need to do now: http://www.soheib.com/technical-knowledge/sql-server-2012-reporting-services-uac-user-access-control/

i hope this will help you somewhere.
thanks, khilit

 

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SQL Server User Group Event on 4th Oct 2012, Singapore

Hello friends,
how are you doing?

There is an event (SQL User Group, Singapore) on 4th October 2012. Following is the detail about the event. Send an email to “Chen Liang <liangchen@dataraid.info>” with your name, working place and contact number for reservation of your seat. There is no charge for all members of SQL Server Singapore User Group.

You can become the member of this group by joining this group: https://www.facebook.com/groups/sqlugsg/

Topic

SQL Server Integration Services 2012 Unplugged

Time

4th Oct 18:30 – 21:00

Place

One Marina Boulevard, 22CF-15

Speaker

Dr. Wee Hyong, Tok

Dr. Wee Hyong is a Senior Program Manager on the SQL Server Integration Services (SSIS) team. Since joining the team in 2008, he has been with the SSIS team, and has worked on all areas of the product.  Prior to joining Microsoft, Wee Hyong is a Microsoft Most Valuable Professional (MVP), and frequently presents at various technology conferences.

Topic Introduction

In this session, you will learn about the new features of Microsoft SQL Server Integration Services in SQL Server 2012. Using customer scenarios, we show the many improvements that have been made to increase developer productivity. You will learn how SSIS 2012 makes it easier for you to deploy, configure, manage and monitor SSIS packages. If you’re wondering what’s in store for SSIS, you won’t want to miss this session!

I hope to see you there.
Thanks, Khilit

 

 

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What is OLAP Database ? What is FASMI?

Hi guys,
i was reading an article and came across this term “FASMI“. i have done a little bit of RnD to find out its head & tail. This is what it means:

FASMI is an acronym of “Fast Analysis of Shared Multidimensional Information“.

A database when called “OLAP Database” if it satisfies following FASMI rules.

1. Fast Analysis (FA):
Data retrieval should be less than 5 seconds. Should support any business scenarios for any type of analysis. The structure should support such flexibility that new calculations can be easily and quickly defined.

Read the rest of this entry »

 

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