SQL Server 2008 (major build version 10.00.xxxx). Please also tag with sql-server.

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10k views

How do you ORDER BY a parameter?

Just wondering if I could solicit some feedback on a stored procedure I'm running and whether there's a more efficient way of handling the scenario (I'm pretty sure there will be!). Basically I have ...
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1answer
415 views

Best practices for connecting DBs that are in different geographical regions

We are about to set up SQL Servers in different countries. We need to link them, but we don't have to have a direct link (as in linked server). In other words, they can be loosely coupled. Is it ...
12
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1answer
5k views

When should you specify PAD_INDEX?

So, you can use FILLFACTOR to leave space in leaf index pages. Specifying PAD_INDEX also leaves space in intermediate nodes. What scenarios should you specify PAD_INDEX, and what benefit does it ...
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4answers
11k views

SQL Server statements intermittently slow on SQL Server 2008 R2

On one of our customers, we've been having some performance issues on our application. It's a .NET 3.5 web app that is consuming and updating data on a SQL Server database. Currently our production ...
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3answers
2k views

What's the most effective way to duplicate an instance on SQL 2008?

We've got a simple database instance with just enough data in the databases to keep it useful, and we can use it for demonstration purposes, and I want to put a copy of it on my laptop so I can use it ...
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1answer
2k views

What is the impact of changing the index creation memory setting in SQL Server?

I am trying to create some indexes a SQL Server 2008 database but am getting the following error message. Msg 8606, Level 17, State 1, Line 1 This index operation requires 1024 KB of memory ...
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3answers
3k views

Implications of using a Unique NonClustered Index with Covering Columns instead of a Primary Key

We have a large table [MyTable] which currently has both a Primary Key, and a Unique Non Clustered Index on the same column ([KeyColumn]). The U NC index also has additional covering columns. Having ...
12
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1answer
519 views

What is the cause of this problem with CONVERT()?

Consider the following two statements: PRINT CONVERT(NUMERIC(38, 0), 0x0100000001, 0); PRINT CONVERT(NUMERIC(38, 0), 0x0100010001, 0); Both statements return -1; isn't that incorrect since the ...
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12k views

SQL Server Max Memory not limiting use of RAM

I would like your input on this. I have a sql server 2008r2 Ent. Ed. 64bit with 16 cores and 64GB RAM. There is one instance of SQL server patched fully as of 20111014. The max ram is set to 60000MB. ...
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565 views

SQL Server Backups - A couple of questions

We run our weekly backup job at 9pm on Fridays and we are experiencing a couple of issues with regard to disk space (which gets perilously low at times) and performance. We're looking at ...
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4answers
62k views

How to handle TimeZone properly in SQL Server?

My local development server is in the Middle East, but my production server is in the UK. I need to show the date to the user in their time zone. For example, if a user is in Saudi Arabia then I ...
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5answers
19k views

Save Results as CSV *with* headers in SSMS

With SQL Server 2008 R2, when I save the results as a CSV there are no headers. I can work around this by copying and pasting with the "Copy with Headers" , or just grab the headers and paste them in ...
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5answers
2k views

UPDATE with JOIN on 100mm records, how to do this better? (in T-SQL)

I need to update 100 million records in a single table, in effect, normalizing the table by replacing the varchar value of a column with simply an ID. (I say "replacing" but really I'm writing the ID ...
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5answers
33k views

Restoring a backup to an older version of SQL Server

When trying to restore a backup to a SQL Server Express 2008 database I got the following error: Restore failed for Server '...\SQLEXPRESS'. (Microsoft.SqlServer.SmoExtended) ...
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3answers
9k views

How to clone a user in SQL Server 2008 R2?

Is there a way to clone users' security and permissions in Microsoft SQL Server, preferably using the SQL Server Management Studio GUI?
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3answers
2k views

SQL Profiler tutorials for newbie

The MSDN documentation tough to understand. Are there any online tutorials available to learn SQL Profiler? If possible, videos or simple blog posts would be preferred.
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1answer
14k views

Why do we need to rebuild and reorganize Indexes in SQL Server

After searching the internet i couldn't find the reason for Why do we need to rebuild and reorganize indexes in SQL Server ? what does internally happens when we rebuild and reorganize ? An ...
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4answers
3k views

When to use XML data type

I'm responsible for creating a database on a project. We have fields that are rarely going to have a value (1 in every 10,000 records) and I'm trying to work out the best way to store this in the ...
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3answers
2k views

Updating a table with millions of records, its been 4 days

I am currently updating a table with millions of records, its been 4 days and query is still executing. I checked the activity monitor its shows that query is running. In event log there is no ...
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3answers
4k views

using *tables* as Table-Valued Parameters (TVP)

MS SQL 2008 supports TVP: a useful feature for bulk uploading data to a stored proceedure for processing. Rather than create a user-defined type, is it possible to leverage an existing table ...
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3answers
3k views

Insert if not exists, concurrently

I am having concurrency issues with my inserts in a stored procedure. The relevant part of the procedure is this: select @_id = Id from table1 where othervalue = @_othervalue IF( @_id IS NULL) BEGIN ...
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2answers
7k views

How to optimise T-SQL query using Execution Plan

I have a SQL query that I have spent the past two days trying to optimise using trial-and-error and the execution plan, but to no avail. Please forgive me for doing this but I will post the entire ...
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1answer
979 views

Workspace Memory Internals

Per my reading books on SQL Server 2008 Internals and Troubleshooting (borrowed from local library in Illinois) by Christian Bolton, Brent Ozar etc. I am trying to seek understanding and confirmation ...
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1answer
37k views

Setting user permissions for different SQL Server schemas

I need to limit access to a particular user, but they still need to be able to see the data in tables owned by dbo. I'm trying to do the following: dbo schema functions as it would normally, has ...
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2answers
1k views

alert when any job in a job category fails

Is it possible to set up an alert in SQL Server 2008 that will send an e-mail anytime a job in a specific category fails? I am wondering because I would like to set up an e-mail anytime an SSRS ...
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3answers
37k views

SQL Server 2005/2008 UTF-8 Collation/Charset

I can't find option(s) directly to set UTF-8 rellated Collations/Charsets in SQL Server 2005/2008, same as is possible to set in another SQL engines, but in SQL Server 2005/2008 are there only Latin ...
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1answer
2k views

Does SQL Server 2008 store the creation date of execution plans?

We recently upgraded an application we use, which involved modifying the schema for the database. These changes could have forced cached execution plans to be discarded. If SQL Server was forced to ...
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5answers
22k views

How to detect any changes to a database (DDL and DML)

There are a lot of databases on my client's sql server. In common, these databases is under development, so developers can design, refactor, do data modifications and so on. There are some databases ...
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1answer
69k views

ODBC Data Source SQL Server Connection - Login Failed For User

I have moved my database from an SQL 2005 to a server with SQL 2008. I am now trying to create an ODBC Data Source. I am using "With SQL Server authentication using a login ID and password ...
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2answers
13k views

ALTER TABLE CHECK CONSTRAINT

From the Object Explorer in SQL Server, when selecting and scripting a foreign-key constraint, the following code is generated. USE [MyTestDatabase] GO ALTER TABLE [dbo].[T2] WITH ...
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1answer
7k views

Are there any risks to granting users SQL Server SHOWPLAN permission?

I'm doing some performance tuning on a large SQL server 2008 database, and the IT group is unwilling to give SHOWPLAN permission. In the past, "Show Execution Plan" has been the most effective way to ...
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3answers
9k views

Emulate a TSQL sequence via a stored procedure

I have a requirement to create a stored procedure which emulates a TSQL sequence. That is it always gives an increasing distinct integer value on every call. In addition, if an integer is passed in ...
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3answers
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Maximum table capacity in SQL Server 2008

I have an application which inserts more than 1 billion rows annually into a table. This table contains some varchar and bigint columns and one blob column as well. The 1 billion rows consist of ...
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1answer
861 views

Slot Array and Total Page Size

I continue to read in many forums and on many blogs that a page is comprised as shown below: Page Size: 16 x 512B = 8192B Page Header: = 96B Maximum In_Row Row: = 8060B This leaves ...
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2answers
4k views

SQL Server VARCHAR Column Width

Searching around the web, I have found conflicting advice on whether there is a performance impact when specifying overly-wide VARCHAR columns, e.g. VARCHAR(255) when VARCHAR(30) will probably do. I ...
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3answers
2k views

Why does my ORDER BY sort two tables before the EXCEPT (slow) and not after (fast)?

SQL server 2008 R2 query optimizer puzzle We have two tables, both containing 9 million rows. 70.000 rows are different, the others are the same. This is fast, 13 seconds, select * from bigtable1 ...
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0answers
281 views

SQL Server Analysis Studio naive Bayes attribute has too many states [closed]

I'm using SQL Server Analysis Studio and I'm trying to train a naive Bayes classifier. I've got an attribute called "item description" that basically represents products you can buy at a store. I've ...
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5answers
86k views

Writing select result to a csv file

We need to write the SELECT query results to a csv file. How can it be done using T-SQL in SQL Server 2008 r2? I know that it can be done in SSIS, but for some reasons, we don't have this option. I ...
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5answers
2k views

SQL Server command line usage? Is it possible?

I've been trying to use the SQL Server Management Studio 2008's built in "Solution Explorer" to manage a project and after 2 weeks of struggling with it, I've decided I don't really care for it. It's ...
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4answers
2k views

How can I write windowing query which sums a column to create discrete buckets?

I have a table which includes a column of decimal values, such as this: id value size -- ----- ---- 1 100 .02 2 99 .38 3 98 .13 4 97 .35 5 96 .15 6 95 .57 7 94 .25 ...
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3answers
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SQL Server 2008/R2 recovery model

Pretty much all of our databases on certain servers do not require the Full Recovery model (we don't do transaction log backups) and the default should always be to create databases and specify the ...
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3answers
41k views

How do I get a list of all the partitioned tables in my database?

How do I get a list of all the partitioned tables in my database? Which system tables/DMVs should I be looking at?
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1answer
808 views

Why does 10^37 / 1 throw an arithmetic overflow error?

Continuing my recent trend of playing with large numbers, I recently boiled an error I was running into down to the following code: DECLARE @big_number DECIMAL(38,0) = '1' + REPLICATE(0, 37); PRINT ...
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1answer
5k views

Deadlock error isn't returning the deadlock SQL

Transaction (Process ID) was deadlocked on lock resources with another process and has been chosen as the deadlock victim. Rerun the transaction. I am getting this error randomly when one of my ...
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2answers
444 views

@table_variable or #temp_table

I have a big user defined table type variable that has 129 columns. I will store around 2000-3000 records in this table variable at a time and pass it to various stored procedures and functions to get ...
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1answer
1k views

If a transaction is “committed” , is it then saved for sure?

If a transaction is committed successfully, can I then be 100% sure that it has been written to the database AND to the log files? Can I be sure that the data is SAVED ? Today our log files had ...
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3answers
4k views

Restrict access for Windows administrator

As the SQL Server best practices says, "Windows Authentication mode is more secure than SQL Authentication". And now I want to know: is there a way to protect SQL Server from user with Windows ...
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2answers
12k views

The database principal owns a schema in the database, and cannot be dropped message

I am trying to delete a principal from the database but can't because it owns a schema. When I go to edit the user, however, the box to uncheck schemae is blue and unremovable. How can I remove the ...
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2answers
8k views

What are the differences between leaf and non-leaf pages?

I've been running some index usage reports, and I'm trying to get a definition of Leaf and Non-leaf. There seem to be both Leaf and Non-leaf Inserts, Updates, Deletes, Page Merges, and Page ...
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1answer
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Empty Strings: Why or when is '' equal to ' '?

Who can explain why select case when '' = ' ' then 1 else 0 end, LEN(''), LEN(' '), DATALENGTH(''), DATALENGTH(' '); yields ----------- ----------- ----------- ----------- ----------- 1 ...