Microsoft's SQL Server is a relational database management system (RDBMS) that runs as a server providing multi-user access to a number of databases. It originated from the Sybase SQL Server codebase, which is why both products use the extension of SQL called Transact-SQL (T-SQL).

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Sql Server - Best Practices for Growing Database Files

I have been monitoring file growth via the data collector in sql server 2008 r2 for two weeks. The database is growing consistently at around 35(MB)/Day. The DB has not yet hit the initial size of 2 ...
12
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2answers
7k views

What is a Clustered Index?

I need a short explaining of clustered index. What is a clustered index? What are best practices for using the clustered index?
11
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1answer
13k views

SIMPLE or FULL recovery model for databases?

When should I use the full recovery model and when should I use the simple recovery model for databases? I always used the full recovery model because it is the default, but today i encountered this ...
9
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3answers
373 views

What is a deterministic method for evaluating a sensible buffer pool size?

I'm trying to come up with a sane way to understand if the max server memory (mb) setting is appropriate (either should be lower, or higher, or stay the way it is). I am aware that max server memory ...
23
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4answers
3k views

Does the order of columns in a table's definition matter?

When defining a table, it's helpful to order the columns in logical groups and the groups themselves by purpose. The logical ordering of columns in a table conveys meaning to the developer and is an ...
14
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3answers
2k views

Is there any benefit to defragmenting SQL indexes in a SAN environment?

Our SQL server lives on a SAN. It contains dozens of OLTP databases, some with several tables containing over 1m records. We have been running Ola Hallengren's index maintenance scripts weekly, and ...
2
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5answers
13k views

Cannot start SqlLocalDB instance with my Windows account

I'm the administrator and simply run the command: sqllocaldb start v11.0 Result: Start of LocalDB instance "v11.0" failed because of the following error: Error occurred during LocalDB instance ...
14
votes
3answers
5k views

Find out what queries are causing the biggest amount of network traffic

On a production SQL server I am seeing intermittent enormous spikes in data traffic. Up to 200Mbit/s which is causing NETWORK IO waits which in turn cause query timeouts. How can I find out what ...
10
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2answers
7k views

What is blocking and how does it happen?

I tried to find some information about blocking in SQL Server, but I could not find a concise explanation for what it is and how it happens. Could you please enlighten me?
8
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3answers
35k views

What's the easiest way to create a temp table in SQL Server that can hold the result of a stored procedure?

Many times I need to write something like the following when dealing with SQL Server. create table #table_name ( column1 int, column2 varchar(200) ... ) insert into #table_name execute ...
10
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3answers
2k views

PostgreSQL Initial Database Size

There are 2 parts to my question. Is there a way of specifying the initial size of a database in PostgreSQL? If there isn't, how do you deal with fragmentation when the database grows over time? ...
8
votes
5answers
6k views

.bak file not visible in any directory in SSMS

I have a .bak file created today by someone else, manually created through SSMS 2008 R2. I'm trying to manually restore the database, unfortunately the file isn't appearing when I go to browse it. I ...
8
votes
1answer
5k views

How and when does SQL Agent update next_run_date/next_run_time values?

I've been working on code in T-SQL to add new schedules to a SQL Agent job using the sp_add_jobschedule proc in the msdb database. When I add a new schedule (typically a run-once at a specific ...
7
votes
2answers
4k views

ETL: extracting from 200 tables - SSIS data flow or custom T-SQL?

Based on my analysis, a complete dimensional model for our data warehouse will require extraction from over 200 source tables. Some of these tables will be extracted as part of an incremental load and ...
6
votes
2answers
19k views

SQL query to return a column per date in date range?

Let me explain what I've got and what I'm trying to achieve. Let's say I have Table A: BookingsPerPerson Person_Id ArrivalDate DepartureDate 123456 2012-01-01 2012-01-04 213415 ...
6
votes
2answers
10k views

Quick look at how much RAM is allocated to SQL Server?

With SQL Server 2005, you could look at the Task Manager and, at least, get a cursory look at how much memory is allocated to SQL Server. With SQL Server 2008, the Working Set or Commit Size never ...
6
votes
3answers
3k views

SQL Server - what isolation level for non-blocking select statements?

I have a long running transaction (called, say, T1) that performs some deletes, updates and inserts on a table in SQL Server 2008 R2. At the same time, another process periodically runs select ...
2
votes
3answers
16k views

Is there a way to generate table create script in TSQL?

Is there a way to generate a create script from an existing table purely in T-SQL (that is without using SMO, since T-SQL does not have access to SMO). Let's say a stored procedure that receives a ...
15
votes
2answers
616 views

Setting up a central CLR stored procedure / function respository library for internal stored procs in other databases to use?

I would like to use code that I developed in C# CLR to be used in all of the databases on the system so that I don't have to set each to trustworthy and turn CLR on and keep a bunch of the same code ...
14
votes
3answers
12k views

Common Table Expression (CTE) benefits?

From msdn : Unlike a derived table, a CTE can be self-referencing and can be referenced multiple times in the same query. I'm using CTEs quite a lot, but I've never thought deeply about the ...
8
votes
3answers
558 views

Would it be considered as a bad practice to have multiple nullable FKs on a table in SQL Server

On my database structure in SQL Server, I have 3 types of products which requires different information about the order. So, I created one Customers table and three different orders tables: ...
7
votes
3answers
14k views

Reset IDENTITY value

I have a table with an IDENTITY column. While developing I delete the rows from time to time and add them again. But the IDENTITY values always kept increasing and didn't start from 1 when I added ...
7
votes
2answers
48k views

Listing the existing SQL Server Logins and Users

I know we can check the logins and the users that are defined, using GUI in SQL Server, but am wondering how we can do this check using script. I ran the query below but it shows Principal_id which ...
6
votes
4answers
4k views

SQL Server script to delete accounts no longer in Active Directory

We have a SQL Server 2000 that will shortly be migrated to SQL Server 2005. It has years of Windows Authentication accounts created that no longer exist in Active Directory, which prevent the Copy ...
6
votes
2answers
2k views

'Conversion failed' error with ORDER BY CASE expression

I have the following Stored Procedure that works great EXCEPT when I set the 'OrderBy' to 'OrderNumber'. I get the following error: Conversion failed when converting the nvarchar value 'SK11270' to ...
6
votes
3answers
8k views

Why is a .bak so much smaller than the database it's a backup of?

I just took a backup of a SQL Server database. The MDF and LDF files together total around 29 GB, but the .bak file was only 23 GB, about 20% smaller. My first guess when one version of a set of ...
3
votes
3answers
5k views

How to move data from big table

There is a big table (5-6 million records). I have to move 90% of old records to other database(table). Solution?
2
votes
3answers
31k views

SQL Server 2008 R2 High memory usage

I have SQL Server 2008 R2 that runs multiple jobs over night, the problem is SQL Server will eat up all RAM and CPU, then it will not release the RAM resources after the job finishes, as a workaround ...
10
votes
3answers
3k views

Is it possible to backup and restore part of a database in sql-server?

We have a sql-server 2005 database that we regularly transfer from our client site to ours. This takes a long time because we don't have a direct connection and have to transfer the file over their ...
7
votes
1answer
212 views

Query optimizer recommends adding index instead of using existing index

I am trying to determine why the query optimizer in SQL Server is recommending creating a new index instead of using an existing index that appears to be sufficient for the query. First the table. ...
6
votes
2answers
2k views

How to backup/restore SQL Server database from command line similar to mysql

I need to automate the migration for some databases from an older server. I know that script a tool using C# for example can be a possibility but I need a simple, fast and effective solution in order ...
4
votes
2answers
985 views

How can I find databases with a large number of virtual log files?

I have several databases on a production server that are in the hundreds of gigabytes, and have many thousands of transactions running through them on a daily basis. Almost all these databases are ...
4
votes
1answer
1k views

Running queries with SQLCMD vs. Running queries with SSMS

I've noticed something which i'm not sure about. can it be that running queries directly with SSMS is much faster than running queries with SQLCMD? I've noticed that the results of queries that ran ...
4
votes
3answers
3k views

NULLs in a composite primary key - SQL Server

I'm trying to work out the best way of creating SQL Server primary keys, foreign keys and constraints to accurately represent my data model in LINQ / Entity Data Objects. Let's assume - for the ...
3
votes
4answers
2k views

Query to find GUID's “not in” null containing subquery returns no results

When I have a query that checks if a column of type uniqueidentifer does not exist in a table that has a null value then I get no results back. If the subquery does not return a null it works fine and ...
3
votes
2answers
988 views

Restore a Database into a Current Database and merge

I want to know how, or if it is possible, to backup a database then should the user wish, restore that database at a later date and merge it with the one they are currently using. Both Databases will ...
3
votes
1answer
374 views

Shrinking log file

Some of the sql log files (idf) are hugh like 5gb. Found a article (http://extended64.com/blogs/rhoffman/archive/2009/06/11/shrink-sql-server-2008-database-log-file-script.aspx) but not sure why he ...
3
votes
1answer
2k views

Is SQL Server Backup single or multi-threaded?

If you perform a... BACKUP DATABASE [DB_Name] TO DISK=N'c:\backups\db_name.bak' WITH STATS=10 Will that perform a single or multi-threaded write? Our Server support company advised us that if we ...
2
votes
3answers
453 views

How to speed up a multiple select query

EDIT - Putting my whole stored procedure: I have the below stored procedure: CREATE PROCEDURE [dbo].[data_Update] @Owner NVARCHAR(255), @ID VARCHAR(255), @Division VARCHAR(255), @Manager ...
1
vote
1answer
69 views

Moving SQL Server 2012 Database to SQL Server 2008 R2

I follow the answer of Mr. Kin in this post How to move a database from SQL Server 2012 to SQL Server 2005 I run the query without errors, but when I check my blank database created on SQL Server ...
1
vote
1answer
856 views

routine to backup ssas databases fails with: The XML for Analysis request timed out before it was completed

I have developed my own stored procedure, that through a LINKED SERVER, backups the SSAS databases according to a table value parameter. the code for the stored procedure is below. the problem: it ...
1
vote
3answers
8k views

Copy a large data from sql query result

In my sql server 2008, after running the query the data return is very huge say in millions. I tried copying but it gives an exception sql memory error. Can you let us know how can i copy the entire ...
1
vote
1answer
246 views

Restoring a differential backup in SQL server 2005

I have created a full back up of my database by executing the line below in my application: Dim Query As String = "backup database Ari to disk='G:\Documents and Settings\i\Desktop\BKAR\" & ...
0
votes
1answer
5k views

How to copy backup files to remote share in SQL Server Agent job without AD/domain accounts involvement?

MS SQL Server 2012... with nightly databases backups to the same/local as SQL Server machine... I am trying to add another SQL Server Agent Job to copy the .bak files to remote (non-windows, i.e. ...
-4
votes
1answer
633 views

Why does a VIEW with a CLUSTERED index not use the index?

I have a view that has a clustered index along with other non-clustered indexes. A simple SELECT query does not use any of the indexes even when I select an indexed column. What could be the ...
33
votes
4answers
23k views

What risks are there if we enable read committed snapshot in sql-server?

I have read here that some extra data will be stored per row so we might see a performance degradation but what other risks are there? eg. Will this affect recovery of the database? Is there anything ...
36
votes
2answers
89k views

How to the get current date without the time part

In SQL Server 2005 how do I get the current date without the time part? I have been using GETDATE() but would like it to have a time of 00:00:00.0
15
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2answers
9k views

What are the best practices for running SQL Server in a Virtual Machine?

What are the best practices for running SQL Server in a Virtual Machine? My on-line transaction activities are very low, but there is a high amount of data processing for the purpose of providing ...
35
votes
11answers
4k views

How can I track database dependencies?

As internal applications evolve over a number of years, you occasionally find there are a number of tables that people believe are no longer relevant and want to cull. What are the practical methods ...
15
votes
4answers
4k views

Identifying Unused Stored Procedures

This next year, I am helping an effort to clean several SQL Server environments. We have about 10,000 stored procedures and estimate that only about 1000 of them are used on a regular basis, and ...