SQL Server 2012 (major build version 11.00.xxxx). Please also tag sql-server.

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65
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5answers
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Are SQL Server in-place upgrades as ill advised as they used to be?

I have been working with SQL server on and off since SQL Server 6.5, the old advice that still rings in my head was never to do an in-place upgrade. I'm currently upgrading my 2008 R2 DEV and TEST ...
44
votes
4answers
14k views

What are Objective Business Reasons to Prefer SQL Server 2012 over 2008 R2?

My company is facing the decision whether to purchase SQL Server 2012 Denali or SQL Server 2008 R2 for a new database server. I am looking for objective reasons to choose one over the other. Our ...
41
votes
5answers
3k views

Date range rolling sum using window functions

I need to calculate a rolling sum over a date range. To illustrate, using the AdventureWorks sample database, the following hypothetical syntax would do exactly what I need: SELECT TH.ProductID, ...
39
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8answers
9k views

Is select * still a big no-no on SQL Server 2012?

Back in the days of yesteryear, it was considered a big no-no to do select * from table or select count(*) from table because of the performance hit. Is this still the case in later versions of SQL ...
34
votes
6answers
19k views

What is a good, repeatable way to calculate MAXDOP on SQL Server?

When setting up a new SQL Server 2012, I use the following code to determine a good starting point for the MAXDOP setting: /* This will recommend a MAXDOP setting appropriate for your machine's ...
34
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2answers
696 views

SQL Server unpredictable select results (dbms error?)

Below is simple example, which returns strange results, that are unpredictable and we cannot explain it in our team. Are we doing something wrong or is it SQL Server error? After some investigation ...
31
votes
2answers
121k views

SQL server databases stuck in restoring state

I have a Sharepoint server. I guess our network administrator has miss configured his back up tool (I guess he uses Symantec backup exec) and now some of my databases are stuck in restoring state! ...
31
votes
4answers
78k views

Can I install SQL Server Management Studio locally?

Can I install SQL Server Management Studio on my desktop to access a database on a SQL Server 2012 instance? If so, where can I find the installer? Google searches only return 'express' versions ...
31
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3answers
127k views

Restore SQL Server 2012 backup to a SQL Server 2008 database?

Is there a way to restore a SQL Server 2012 database backup to a SQL Server 2008? I tried to attach file, it does not work.
29
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2answers
2k views

Why are Denali sequences supposed to perform better than identity columns?

In his answer to Which is better: identity columns or generated uinique id values? mrdenny says: When SQL Denali comes out it will support sequences which will be more efficient than identity, but ...
27
votes
3answers
4k views

At what point does one database per client become unfeasible?

For one of our systems, we have sensitive client data and store each client's data in a separate database. We have about 10-15 clients for that system. However, we're developing a new system that ...
27
votes
2answers
6k views

Optimising plans with XML readers

Executing the query from here to pull the deadlock events out of the default extended events session SELECT CAST ( REPLACE ( REPLACE ( XEventData.XEvent.value ('(data/value)[...
26
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3answers
4k views

Are there disadvantages to contained databases?

SQL Server 2012 introduced the concept of "contained" databases, where everything (well, mostly everything) the database needs is contained within the database itself. This offers big advantages when ...
25
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2answers
17k views

Does a re-index update statistics?

I've been doing the MS10775A course this past week and one question that came up that the trainer couldn't answer reliably is: Does a re-index update the statistics? We found discussions online ...
24
votes
2answers
4k views

Why does query error with empty result set in SQL Server 2012?

When running the following queries in MS SQL Server 2012 the second query fails but not the first. Also, when run without the where clauses both queries will fail. I am at a loss why either would fail ...
24
votes
2answers
48k views

When is it appropriate to use SQL Server Developer Edition? [closed]

Do you use SQL Server Developer Edition on server-class machines in DEV and STAGING environments? I am working on a large project where (if it passes the proof of concept stage) we will have several ...
22
votes
4answers
2k views

Copying (hundreds of) tables from one server to another (with SSMS)

I have several hundred (currently 466, but ever growing) tables I have to copy from one server to another. I have never had to do this before, so I'm not sure at all on how to approach it. All the ...
22
votes
1answer
270 views

Very strange performance with an XML index

My question is based on this: Improve Xquery performance in SQL Server To give an answer there I did the following test-scenario. Test scenario First I create a test table and fill it with 100.000 ...
20
votes
1answer
13k views

Why are queries causing spill to tempdb?

Background I am in the process of migrating a 160gb database from MSSQL 2008 (standard) on a Win 2008 server with 48gb RAM to a new server running MSSQL 2012 (64-bit web edition) on Win 2012 with ...
19
votes
9answers
4k views

Test if a string is a palindrome using T-SQL

I am a beginner in T-SQL. I want to decide whether an input string is a palindrome, with output = 0 if it is not and output = 1 if it is. I am still figuring out the syntax. I am not even getting an ...
18
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1answer
123 views

Sequence - NO CACHE vs CACHE 1

Is there any difference between a SEQUENCE declared using NO CACHE and one declared using CACHE 1 in SQL Server 2012+? Sequence #1: CREATE SEQUENCE dbo.MySeqCache1 AS INT START WITH 1 ...
17
votes
5answers
11k views

SQL Server Agent Jobs and Availability Groups

I'm looking for best practice in dealing with scheduled SQL Server Agent jobs in SQL Server 2012 availability groups. Maybe I missed something, however at the current state I feel that SQL Server ...
17
votes
1answer
17k views

Connection pools being reset with Error: 18056, Severity: 20, State: 46. & Perfmon Counters not showing

We are using SQL authentication & .net 4.0 Connection strings to connect to an Enterprise Edition 2012 SP1 SQL Server on a windows 2008r2 Enterprise Server. We use about 50 Servers split into 8 ...
16
votes
4answers
29k views

How do I move SQL Server database files?

I have a database and want to move the .mdf and .ldf files to another location. But I do not want to stop the MSSQLSERVER service, and I do not want to export to another server. How can I do this?
16
votes
2answers
962 views

Max number of user connections

In SQL Server 2012 Standard edition, I know that the max number of user connections is 32,767. What should I do as a DBA if I am heading towards this number? Currently there are 30,000 user ...
16
votes
2answers
29k views

How To Profile Stored Procedures

I am using SQL Server 2012 and was wondering how to profile stored procedures For instance can profiler capture each individual SQL statement in a stored procedure, what it is, and how long it takes ...
16
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1answer
2k views

Why 0 is equal to empty string?

I need some help in finding why the following T-SQL statement returns 1 (true): SELECT IIF( 0 = '', 1, 0) I guess someone has change an ANSI option like SET ANSI_NULLS or something else that is ...
16
votes
2answers
3k views

Why does DELETE leave a lingering effect on performance?

At the end is a test script for comparing the performance between a @table variable and a #temp table. I think I've set it up correctly - the performance timings are taken outside of the DELETE/...
16
votes
3answers
2k 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 (...
16
votes
1answer
16k views

Why does SQL Server 2012 Express use 9.5GB of RAM on my server?

I am building an application in which I plan to embed SQL Server 2012 Express as the primary datastore. When testing on my development machine (Win7-32 with 3GB RAM), I never observed the sqlservr....
15
votes
6answers
2k views

What is SQL Server “Denali”? What's new?

I found a new title called SQL Server "Denali" in the drop down list on MSDN, but I didn't find much information about it: What's New (this documentation is for preview only as I see) Top 9 New ...
15
votes
3answers
573 views

Implementing subtype of a subtype in type/subtype design pattern with mutually exclusive subclasses

Introduction In order for this question to be useful for future readers I will use the generic data model to illustrate the problem I face. Our data model consists of 3 entities, which shall be ...
15
votes
3answers
17k views

Truncated 200GB table but disk space not released

I have only 2GB left, so I need to remove this history table. This table now is empty but the database disk space not released. And the database file is 320GB.
15
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2answers
681 views

Lock CREATE TABLE

In another application I was struck by bad design: multiple threads execute an EnsureDatabaseSchemaExists() method concurrently, which looks basically like this: IF NOT EXISTS (SELECT * FROM sys....
15
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1answer
215 views

Multi-statement TVF vs Inline TVF Performance

Comparing some of the answers on the Palindrome question(10k+ users only, since I've deleted the answer), I'm getting confusing results. I proposed a multi-statement, schema-bound TVF which I thought ...
14
votes
3answers
1k views

Why would SQL Server ignore an index?

I have a table, CustPassMaster with 16 columns in it, one of which is CustNum varchar(8), and I created an index IX_dbo_CustPassMaster_CustNum. When I run my SELECT statement: SELECT * FROM dbo....
14
votes
2answers
35k views

What is the fastest way to insert large numbers of rows?

I have a database where I load files into a staging table, from this staging table i have 1-2 joins to resolve some foreign keys and then insert this rows into the final table (which has one partition ...
14
votes
1answer
2k views

What's the anatomy of a columnstore index?

One of the new features in SQL Server 2012 codenamed Denali is the Columnstore index. I know a good bit about regular old row-store indexes, like the b-tree structure, differences in storage between ...
14
votes
1answer
505 views

Plan cache size and reserved memory

When running a query including the Actual Execution Plan, the root operator (SELECT) tells me that the Cached Plan Size is 32KB. A query that joins sys.dm_exec_cached_plans and sys....
13
votes
1answer
2k views

“Cannot create a row of size 8074 which is greater than the allowable maximum row size of 8060” while altering the table

I am trying to alter a column in a table. The existing table is like this: CREATE TABLE [dbo].[table]( [id1] [int] NOT NULL, [id2] [int] NOT NULL, [id3] [int] NOT NULL, [name] [nvarchar](...
13
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2answers
3k views

Newer Version of SQL Server Less Stable?

Our database architect told a client of ours that SQL Server 2014 is a poor choice over 2012 because it lacks the performance and stability advantages that 2012 has. Everything I've read contradicts ...
13
votes
6answers
29k views

SQL Server 2012 slower than 2008

I migrated a large website and database from an older server (Windows 2008 / SQL Server 2008 / 16 GB RAM / 2 x 2.5 GHz Quad Core / SAS disks) to a newer, much better server (Windows 2008 R2 / SQL ...
13
votes
2answers
38k views

SQL Server 2012 Restore backup to new DB Name

I seem to remember that, in 2008, you could restore a backup to a new copy of a DB, by changing the name in the "Destination Database" field from the restore-wizard. It would create a brand new DB, ...
13
votes
2answers
162 views

Index on a persisted computed column not seekable?

I have table, called Address, that has a persisted computed column called Hashkey. The column is deterministic but not precise. It has a unique index on it that is not seekable. If I run this query, ...
13
votes
2answers
5k views

SQL Server's READ COMMITTED SNAPSHOT vs SNAPSHOT

I was researching the differences between SQL Server's READ COMMITTED SNAPSHOT and SNAPSHOT isolation levels and came across the following resource: Choosing Row Versioning-based Isolation Levels ...
12
votes
3answers
1k views

Get streak count and streak type from win-loss-tie data

I made a SQL Fiddle for this question if that makes things easier for anyone. I have a fantasy sports database of sorts and what I'm trying to figure out is how to come up with "current streak" data ...
12
votes
4answers
31k views

How to view an encrypted view or stored procedure

I am working on a third party database. When I try to view the definition of a view by right clicking, CREATE TO and then to NEW QUERY EDIT WINDOW, I am getting an error: This property may not ...
12
votes
3answers
8k views

Unique Identifier with Extra Characters Still Matching in Select

We are using SQL Server 2012 with a unique identifier and we've noticed that when doing selects with additional characters added onto the end (so not 36 chars) it still returns a match to a UUID. For ...
12
votes
2answers
5k views

Limit connection rights on SQL Server

I have an app to deploy in production that uses 'honor system' security. That is, all users connect to the DB using a SQL user/passwd credential and the app manages permissions itself. The latter part ...
12
votes
4answers
13k views

SSMS Tools Pack Alternative [closed]

Are there any tools out there comparable to SSMS Tools Pack 2012? The licensing ($30 per machine, $100 for any number of machines... for 3 months) leaves a lot to be desired and I wasn't sure of what ...