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sqlshots: Working with a Suspect Database

Recently I faced a problem with a mobile device (subscriber) which had a suspect database. I tried running the following command to check the database:

 DBCC CHECKDB ('databasename') 

but it did not work. I wanted to try a few other options, but the need for the device out weighed pin pointing the root problem. So I had to reinitialize the device and send it on it's way.  In the meantime I research a bit and ended up talking with a fellow DBA by the name of David Underwood (LinkedIn Profile). The good guy provided some very useful links which illustrated some measures to take. Here is the Code Project Link: http://bit.ly/72ar6x

The Code Project Site basically states to use the following statements.

 EXEC sp_resetstatus 'yourDBname';
 ALTER DATABASE yourDBname SET EMERGENCY
 DBCC checkdb('yourDBname')
 ALTER DATABASE yourDBname SET SINGLE_USER WITH ROLLBACK IMMEDIATE
 DBCC CheckDB ('yourDBname', REPAIR_ALLOW_DATA_LOSS)
 ALTER DATABASE yourDBname SET MULTI_USER 

If I get the opportunity I will certainly attempt it.  Since I was not working on the actual device I had to look for another route.

So I decided (since I had to expedite my troubleshooting efforts and get the device back in the rotation ASAP) to stop the SQL service and copy the actual problematic database files from the data directory. With the files in reach I felt that I could attach them to a Virtual Instance and troubleshoot the problem further. So here are the steps I took.

1. Opened up SQL Server Management Studio (SSMS)

2. Right clicked on the SQL Instance and selected Attach

3. Click the Add button

4. Select the database file

5. Clicked Ok

6. Received the Attachment Error

7. Click on the Hyperlink to see the Details

8. Decided I should remove the LOG file

9. Removed the physical LDF file from the Data directory (I had a backup of both)

10. Clicked Ok

11. The Database attached fine

I wonder if I had taken the same approach would it have resolved my issue?  I guess I'll never know until it happens again. Who am I kidding... you can't!

 

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Filed under  //   attach database   dbcc   dbcc checkdb   sql   sqlshots   suspect   suspect database   tsql  
Posted by Samson Loo 

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sqlshots: Add Leading Zeros

Typically in most cases you find yourself removing leading zeros but in this case I needed to add leading zeros to a column. 

Remove Leading Zeros

 SELECT CAST(CAST(ColumnName AS INT) AS VARCHAR(10)) FROM TableName

Let's Pad the field

Since I needed 6 chars this will add 3 spaces to the front of the numbers

 SELECT STR(ColumnName, 6) FROM TableName 

Add Leading Zeros

Let's say we need to add zeros to an employee id, well this would be an easy way to accomplish it. First we pad it with spaces and replace those spaces with zeros.

 SELECT REPLACE(STR(ColumnName, 6), SPACE(1), '0') FROM TableName 



SELECT SalesPersonID 
       ,REPLACE(STR(SalesPersonID, 6), SPACE(1), '0') AS PaddedSalesPID  
FROM   Sales.SalesPerson


Note: the SPACE(1) is equivalent to ' ' (That is a Tick Space Tick) So two Ticks with a space in between)

Update Table



UPDATE Sales.SalesPerson 
SET newSalesPID = REPLACE(STR(SalesPersonID, 6), SPACE(1), '0')


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Filed under  //   add leading zeros   sql   sqlshots   t-sql   transact-sql  
Posted by Samson Loo 

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sqlshots: Reporting Services 2005 - Unable to load client print control

I received a trouble support call from a client that encountered an error while attempting to print a Report via Reporting Services. The client was able to print before then suddenly it became an issue. Coincidentally Microsoft released two hotfixes (KB956803 & KB956391) which added a “kill-bit” associated to the ActiveX printing control used by Reporting Services 2005.

Hotfix KB956803 only affects Windows XP & Windows 2003 platforms while Windows 2000, Vista and 2008 platforms were not affected.  Hotfix KB956391 seems intended to patch vulnerabilities within the Office products.

 

There are a few ways to go about it and correct it:

 

Possible Solutions on the (Client Side)

1)      Uninstall both hotfixes (KB956803 & KB956391)

2)      Install the following Reporting Services update (http://www.microsoft.com/downloads/details.aspx?FamilyID=82833f27-081d-4b72-83ef-2836360a904d&DisplayLang=en)

3)      Delete a single key in the registry (Which is what I chose)

 

Corrective Steps for item 3

a)      I located and deleted the following key from the registry. [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{FA91DF8D-53AB-455D-AB20-F2F023E498D3}]

b)      Then I had restarted (close/re-launched) all IE sessions

c)       Browsed to the Reporting Services url

d)      Opened a report

e)      Clicked the print button (if you have or haven’t installed the print client you may or may not receive the yellow “Install ActiveX” dialog just below the IE header area. You may just receive the Print Dialog instead.)

f)       The report printed fine

 

g)      I did restarted the system but the key did return; however, when I tried it again I had no further issues. 

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Filed under  //   client-sde print error   mssql 2005   print error   reporting services 2005   reporting services   rs 2005   sqlshots  
Posted by Samson Loo 

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sqlshots: Delivering subscriptions outside the Organization

Recently I faced an issue with reporting services 2005 when attempting to deliver subscriptions to addresses outside of the organization. Internal addresses received the email based subscription deliveries without any questions. I must have checked and re-checked the settings using RSConfigTool about million times, looking for anything I might have overlooked. The error message I received was, "The e-mail address of one or more recipients is not valid". After some research (which lead me to a lot of dead ended forums) I read the phrase "email relay", that's when the gears started spinning.

I realized that the issue had nothing to do with the configuration of SQL Server Reporting Services; rather, the SMTP server! In order for the messages to be delivered outside of the organization the Reporting Services Server needed to be authorized so-to-speak. Unfortunately I don't have access to Exchange 2003 so I cannot provide screen shots, but for 2007 all you need to do is add the server's IP Address to the SMTP server’s receiver group in the HUB Transport configs.

Then to test your subscription without tweaking the schedule execution time just run the SQL job! First find out the name of the job by using the attached sql script, then execute the sp_start_job. If you have a named instance append $instancename to all three of ReportServer occurrences within the sql script (i.e. ReportServer$InstanceName) for MSSQL 2005. I believe for MSSQL 2008 you would append _InstanceName (i.e. ReportServer_InstanceName), but I am not certain. You should get the results similar to the screen shot attached.

   
Click here to download:
sqlshots_Delivering_subscripti.zip (54 KB)

Using the script with a default instance

 SELECT	
    sj.[name] AS [Job Name], 
    c.[Name] AS [Report Name], 
    c.[Path], 
    su.Description, 
    su.EventType, 
    su.LastStatus, 
    su.LastRunTime 
 FROM msdb..sysjobs AS sj INNER JOIN ReportServer..ReportSchedule AS rs 
    ON sj.[name] = CAST(rs.ScheduleID AS NVARCHAR(128)) INNER JOIN 
    ReportServer..Subscriptions AS su 
    ON rs.SubscriptionID = su.SubscriptionID INNER JOIN 
    ReportServer..[Catalog] c 
    ON su.Report_OID = c.ItemID 

Using the script with a named instance

 SELECT	
    sj.[name] AS [Job Name], 
    c.[Name] AS [Report Name], 
    c.[Path], 
    su.Description, 
    su.EventType, 
    su.LastStatus, 
    su.LastRunTime 
 FROM msdb..sysjobs AS sj INNER JOIN ReportServer$InstanceName..ReportSchedule AS rs 
    ON sj.[name] = CAST(rs.ScheduleID AS NVARCHAR(128)) INNER JOIN 
    ReportServer$InstanceName..Subscriptions AS su 
    ON rs.SubscriptionID = su.SubscriptionID INNER JOIN 
    ReportServer$InstanceName..[Catalog] c 
    ON su.Report_OID = c.ItemID 

Execute the report

 USE msdb EXEC sp_start_job @job_name = 'AF015D8B-D80D-4D2A-9808-CD1D519B3332' 

Correction
In the attached file listed below I have identified a typo. Currently it states on
Line 19: sp_start_sp (which is incorrect) it should be
Line 19: sp_start_job

Click here to download:
SELECT.Get_RSSubscription_Jobs_v0.02.sql (0 KB)

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Filed under  //   mssql 2005   report subscriptions   reporting services   reporting services 2005   sql scripts   sql server 2005   sql server reporting services   sql server reporting services 2005   sqlshots   ssms   t-sql  
Posted by Samson Loo 

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sqlshots: Querying tables without a (JOIN CLAUSE)

Typically you would use a JOIN clause when querying from multiple tables, but no one said you have to. Say for example you wanted to query two tables (tableA & tableB) which did not have any relationship (no one-to-one at all), yet there are fields in which would permit a comparison. Say street number, pre-direction, street name and the suffix.

Well you would compare
(tableA.street number = tableB.street number) and
(tableA.pre-direction = tableB.pre-direction) and
(tableA.street name = tableB.street name) and
(tableA.suffix = tableB.suffix).

Well I did not have a sample dataset for that illustration but I do have the AdventureWorks database, so here we go.

This first example will illustrate a query using a JOIN clause.

Results

This example illustrates a query without using a JOIN clause.

NOJOIN_Query

Results

As you can see the results are the same, but the queries are a tad different.

-- samson

 

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Filed under  //   inner join   join clause   joinless queries   quering multiple tables without using a join clause   sql   sqlshots   ssms   tsql  
Posted by Samson Loo 

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sqlshots: Identity Columns

There are a lot of sites out there that give an in-depth definition of identity columns (this ain't one of them), but I have to admit that it was something I took for granted recently. In my task to clean up geospatial address data, specifically for geo-coding purposes I over looked the goodness of having an identity field as part of table. The data that I received did not have an ID field and for some odd reason I thought nothing of. I figured I would make updates by comparing multiple columns to target specific rows.  Well that worked fine until I realized that I had duplicate data. Digging myself deeper into a whole I kept doing things the hard way, well let's just say I did things the less efficient way.

Once I finally realized what I had been doing was inefficient I decided to introduce an ID field to the table. However old habits are hard to kill. Typically when I create ID fields I always leave (identity) off because I use UDFs to generate my sequential numbering. Reason being if there is ever a need to remove a record or delete a record (which seldom occurs since I use bit fields to designate active versus inactive records) the numbering continues. So if I have rows one through five and physically delete row five (ID 5), my next insert will become ID 6. Making the sequence 1,2,3,4,6.

Some may disagree but I really don't like that and no I am not OCD. It's just that I hate wasting IDs and avoid it whenever possible, hence my dilemma. So I add the column via the UI and save my changes. Then I start to think what is the best way to populate this newly added column. Not seeing the obvious (big rookie mistake on my part) I must have wasted 30 mins to an hour before I stepped away to grab a drink. Then all of a sudden it occurred to me that I could drop the column and re-add it via alter statement and all my worries would be gone. Which I did. You can do the same using the UI.


One simple single line could have prevented a self inflicted heartache because I was being an idiot. Once I ran it, the row was created and populated in sequential order. Just goes to show sometimes you need to step away from the task at hand to see what you are doing wrong! Granted I only needed the column temporarily; nonetheless, it helped a great deal when running bulk updates and having to compare a single column versus five to six. Especially when dealing with hundreds of thousands of records.

ALTER STATEMENT:

ALTER TABLE TableName ADD ID INT IDENTITY(1,1) 

Just to give you a visual of what exactly transpired here is little step by step (example data only):

BEFORE AND AFTER

1) SELECT * FROM TestTable

2) ALTER TABLE TestTable ADD ID INT IDENTITY(1,1)

3) SELECT * FROM TestTable

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Filed under  //   id   id column   id columns   identity   identity column   identity columns   identity increment   identity seed   is identity   sql   sqlshots   ssms   tsql  
Posted by Samson Loo 

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