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).

learn more… | top users | synonyms (2)

3
votes
1answer
90 views

Restoring with replace going incredibly quickly [duplicate]

So I have a database (on a SQL Server 2008 R2 SP2 instance) that is 2TB uncompressed, with a .bak file that is 500GB compressed. As I have been toying with the fastest way to restore this database ...
1
vote
2answers
4k views

Best Possible Solution for Reporting Mirroring or Replication?

Hi I have SQL SERVER 2008R2 Data Centre Edition and I use SSRS and a Vendor application for reporting. I have a Reporting Server where we backup and restore everyday from Live Server to have Data ...
3
votes
1answer
112 views

DBCC show_statistics: density doesn't match what I calculate

I've read in several articles that the density of a column is (1.0 / count(distinct columnname)). I have a column with roughly 2.6 million distinct values over 2.7 million rows, but the column ...
5
votes
1answer
11k views

Syntax of INNER JOIN nested inside OUTER JOIN vs. query results

TLDR; If you look at the 2 execution plans, is there an easy answer to which is better? I purposefully did NOT create indexes so it's easier to see what's happening. Following up on my previous ...
1
vote
1answer
245 views

Product quantity bound to colors and sizes table structures

I've been thinking about how I'll be able to create products with sizes and colors which will match the max quantity of a product (or their total will be the max.quantity ). Let's say I got a product ...
1
vote
0answers
47 views

SQL Server log Size increasing while in Simple recovery mode [duplicate]

Is it possible to locate the active transaction, it was not listed in DBCC opentran, the log file keeps getting bigger. Database is in Simple recovery tried shrinking the database - no luck Also ...
0
votes
1answer
402 views

Multibyte replace not working in SQL Server

Why does one work and the other doesn't? SELECT REPLACE(N'IAșI' ,N'ș','x') -- doesn't match (returns 'IAșI') SELECT REPLACE('IAșI' ,'ș','x') -- works (returns 'IAxI') My guess would be that in the ...
4
votes
1answer
3k views

What's the impact of running sp_updatestats in production server?

Is it safe to run sp_updatestats on an SQL Server in the production environment? Or rather, what is the impact of updating all statistics on a sql server? Can it "choke" the sql server while it runs ...
4
votes
1answer
361 views

Large difference in disk space used by partitions

I have a partitioned table that contains about 155 million records total. It's partitioned by year and the partitions for both the current and previous years contain about 25 million records each. ...
3
votes
1answer
167 views

join syntax / style performance consideration

Edit: I've added a follow up question based on comments by @ypercube about semantic equivalence and my findings of the query behavior changes when you have a mix of outer/inner nested joins. We ...
2
votes
4answers
136 views

Benefits of droping a temporary table

What are the benefits (if any) of dropping a temporary table in SQL Server? eg: DROP TABLE #temp; Since temporary tables are automatically dropped by the server this statement would seem to be ...
0
votes
1answer
3k views

Row locking within stored procedure [duplicate]

I have a SQL Server Stored Procedure for getting the next number in sequence stored in a configuration table: declare @val as int SELECT @val = LongValue from tblSystem WHERE [Key] = @Key; SET @val ...
0
votes
2answers
805 views

Why would a long running query remain sleeping and with null wait_info

The following query was run on SQL Server 2008 R2 and took over 1 hour to run: select log_id, type, instance_id from ts_cache_log where log_id > 146400 order by log_id It produced 0 rows ...
1
vote
2answers
2k views

Protect SQL Server from hackers

Today, my SQL Server 2008 is attacked by hacker from IP address in China [4300 Login failure in last 7 hours]. I contacted GoDaddy support and below is what they told me. EXEC sp_readerrorlog 0, 1, ...
5
votes
1answer
324 views

Minimal Logging Conditions in SQL

I have written a script to test out the claims made on this page http://technet.microsoft.com/en-us/library/dd425070(v=sql.100).aspx in the table titled Summarizing Minimal Logging Conditions about ...
1
vote
3answers
529 views

How to determine if SQL Server will not execute parts of the script in parallel?

Are there any general rules or maybe easy way to tell if SQL script will execute in batches instead of "all at once"? USE UserDB; GO DBCC SHRINKFILE (DataFile1, 5); GO DBCC SHRINKFILE (DataFile2, ...
1
vote
1answer
849 views

Can't restore Azure bacpac into localdb with SqlPackage

I have made a backup of my SQL Azure in a bacpac file and when I try to import the bacpac in localdb it always fail. Here is the command I use: PS C:\Program Files (x86)\Microsoft SQL ...
8
votes
5answers
9k views

Freeing Unused Space SQL Server Table

I have a table in SQL Server Express with a lot of unused space. I need to free up space in the database. | NAME | ROWS | RESERVED | DATA | INDEX_SIZE | UNUSED | ...
4
votes
2answers
4k views

GROUP BY with MAX versus just MAX

I am a programmer, dealing with a big table which the following scheme: UpdateTime, PK, datetime, notnull Name, PK, char(14), notnull TheData, float There is a clustered index on Name, UpdateTime ...
5
votes
3answers
2k views

Is SQL Server's FILETABLE suitable for storing large files (bigger than 10 GB)?

There is a project for lab. The requirement to save the lab data (raw data and related infomation ) for research for years. So the data must be saved for years, but the data is so big, every raw ...
1
vote
1answer
792 views

DB Mirroring in async/High Performance mode: Available in SQL Server 2008 Standard Edition?

This should be easy, but the MS docs are not clear. The docs: http://msdn.microsoft.com/en-us/library/cc645993%28v=SQL.100%29.aspx Indicate that in Standard edition, the only supported mirroring is ...
2
votes
2answers
526 views

Sql server - Rebuilding Indexes - Does it affect foreign keys?

i am looking at speeding up the performance of my database, and thought that Rebuilding some indexes might help. My question is, will this invalidate Foreign Keys from other tables pointing to the ...
2
votes
4answers
401 views

SQL Server: Database integration and synchronization

I have n SQL Server databases with the same data schema. On the other hand i have a web application that needs to retrieve, for some entities, the union of the information stored into the n ...
0
votes
1answer
103 views

Should I use backup compression for databases where all data is already compressed?

In SQL server with enterprise edition, there are databases with all the tables/indexes compressed. Does it still make sense to do compressed backup?
1
vote
1answer
2k views

MS SQL Server accepts non-SSL connections even with Force Encryption enabled on the server side

I am forcing encryption on my MS SQL server. My intention is to reject any client connection that does not use SSL to connect. Am I on the right track? Here are my detailed steps : makecert -r -pe ...
0
votes
1answer
105 views

Infraestructura DBA [closed]

Well, I'm newbie, now only to realize at the nick. I am developing an online system, which will have information from several companies. Each company has its desktop system with the local database. A ...
1
vote
1answer
422 views

Easier way to change every user in every database to default schema = dbo?

There was recently a domain migration where our SQL Server is hosted. I have two servers and about 30 DBs on each. Every user was changed to the new domain but in doing so, their default schema ...
0
votes
1answer
1k views

Installing SQL Server 2008 R2 Express on Server 2012 - Could not load file or assembly

I'm trying to install SQL Server 2008 R2 Express Edition SP2 on Windows 2012 server. The error is: Any clue?
1
vote
1answer
2k views

SQL Server 2008: High CPU historical queries

We have a SQL Server with 15 databases on it. This is used by many users in each database simultaneously. Recently we started getting high CPU alerts from this server. When the alert comes, I can ...
1
vote
0answers
75 views

How to manage primary key while updating [closed]

In the following table primaryKeyColumn is primary key. To maintain the data history I always uses the values with WHERE condition(WHERE StatusColumn=1) And will set the StatusColumn to 0 if the data ...
0
votes
1answer
218 views

SQL Server Index Scan Actual Executions

I have a fairly complicated query and running it on two databases with same schemas, but with different data produces different result. On database D1 the elapsed time is around 1 second, and the ...
0
votes
1answer
1k views

SQL Linked Server Passing Date Parameters

I'm using SQL Server 2008 R2 and have a linked SQL 2012 Express database. On the 2008 box I am creating a stored procedure to be used in a report. I am wanting to pass a date variable so the user ...
0
votes
0answers
133 views

Expanding the database in SQL Server 2008 R2

I have a database server DBA with .mdf and .ldf files on a SAN. Often one of my database will not list out the tables (unable to extend the db), Every time I have to take it offline and bring back ...
1
vote
5answers
4k views

How to delete the remote files older than N days on schedule from SQL Server 2012 (with SqlServerAgent job)?

Struggling to execute PowerShell commands in SqlServer Agent job of MS SQL Server 2012 R2 (Windows Server 2008R2, Windows 7 Prof) I need to delete (.bak files older, than, say, 7 days in remote ...
1
vote
0answers
149 views

Why does removing a RID by creating a clustered index lose parallelism and slow down execution by 2X

If I remove a RID lookup by replacing 2 non-clustered indices (non unique) with 2 identical clustered indicies (non-unique) where there weren't any before, why does this query slow down by a factor ...
0
votes
2answers
893 views

Grant a login of Sql server authentication the same permission of a Windows group login with Windows authentication?

Update: I am trying to make it easier for the login to have the permissions on multiple databases. I already have a Windows group login with Windows authentication. The Windows users in the group can ...
1
vote
1answer
202 views

How to find what prevented in getting a lock?

Sometimes my update statements fail after 3000 milliseconds with 'Lock request time out period exceeded' error. That 3000 limit is coming from my application through SET LOCK_TIMEOUT 3000 setting, ...
0
votes
1answer
553 views

Kerberos Authentication Issue

I'm getting these errors when testing a linked server from SQL Server 2012 to SSAS 2012 (both servers are Windows 2012 and clustered) "An error was encountered in the transport layer" and "The peer ...
3
votes
2answers
163 views

Restore database to a instance in network

We are creating a application which requires sql database as backend to store data. So when user install my application he chooses a sql instance and its details. There we plan to restore the database ...
2
votes
1answer
128 views

Time Boxing SSIS Task

I've an SSIS task which download a couple of files,update various Database tables and archive the files(i have it split in various packages). The average time to completion is about 2.30 min. ...
1
vote
2answers
134 views

Create users in SQL Server 2012

I created a new login and a new user and I mapped a database in SQL Server 2012. In the login properties in Securables, we selected permissions "deny" for "View any database" for the user to see only ...
19
votes
3answers
2k views

Index on Persisted Computed column needs key lookup to get columns in the computed expression

I have a persisted computed column on a table which is simply made up concatenated columns, e.g. CREATE TABLE dbo.T ( ID INT IDENTITY(1, 1) NOT NULL CONSTRAINT PK_T_ID PRIMARY KEY, A ...
2
votes
1answer
114 views

How can I change Referential Integrity from a Unique Key Constraint to a Primary Key?

(without dropping foreign keys) I have migrated a SQL Server CE database to SQL Server 2012, however, referential integrity was enforced via unique key constraints on the surrogate INT identity ...
0
votes
1answer
95 views

In sys.dm_os_memory_cache_entries view, what does original cost mean?

Looking at a couple of DMVs, and trying to see if I can programmatically figure out the cost of the cached plans in my SQL Server. I'm hoping that column represents the same concept of cost that is ...
5
votes
1answer
465 views

Passing a literal ? to sp_MSforeachdb

I am trying to search for the ? character in a string, but across all dbs on a server. Since the ? mark is a placeholder for the database name, how may I format the query so it knows I mean to search ...
1
vote
1answer
222 views

Should I extract / normalize the mailing address despite requirements limiting number / type of addresses?

I currently am working on a contacts application (similar to Outlook contacts combined with eVites and LinkedIn). The requirements for the application are to limit the addresses (and phone / email ...
1
vote
2answers
7k views

SQL Server 2005 Express on Windows 8

I need to install SQL Server 2005 Express on Windows 8 Home Edition x64. But I get a compatibility error! I have tried SP1, SP2, SP3 of SQL Server 2005. Visual Studio 2008 is working fine. Any ...
2
votes
2answers
10k views

How to Fix log_reuse_wait_desc=LOG_BACKUP? LOG Backup not possible

I checked sys.databases to find out which databases need LOG backups. It surprised me that I had quite a few where log_reuse_wait_desc=LOG_BACKUP meaning, the JOB I have set up to run LOG backups on ...
1
vote
1answer
624 views

Securely deleting data from SQL Server logs

Is there a good way to purge data from a particular DB's *.LDF? A little background... I'm a SysAd, not a DBA. I'm running SQL Server 2008 R2 for one of my applications and I'm not particularly ...
0
votes
3answers
339 views

Force spool to avoid creating temp tables?

I have the following query which join pivoted data of several very big tables and it runs very slow. I tried to created the temp table for each pivoting and it runs much faster. Is it a way to force ...