Questions tagged [sql-server-2005]

SQL Server 2005 (major build version 9.00.xxxx). Please also tag sql-server.

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84
votes
2answers
261k views

How to get the 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
74
votes
6answers
174k views

SQL Server Cannot drop database <dbname> because it is currently in use… but no sessions displayed

When I try to drop a database I get the error "Cannot drop database "dbname" because it is currently in use". However, when I run sp_who2, there are definitely no sessions connected to this database. ...
70
votes
6answers
69k 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 ...
66
votes
4answers
161k views

How to identify which query is filling up the tempdb transaction log?

I would like to know how to identify the exact query or stored proc which is actually filling up the transactional log of TEMPDB database.
64
votes
4answers
54k views

Index Seek vs Index Scan

Looking at an execution plan of a slow running query and I noticed that some of the nodes are index seek and some of them are index scan. What is the difference between and index seek and an index ...
52
votes
3answers
4k views

Huge slowdown to SQL Server query on adding wildcard (or top)

I've got a zoo of 20 million animals which I track on my SQL Server 2005 database. About 1% of them are black and about 1% of them are swans. I wanted to get details of all the black swans and so, not ...
44
votes
5answers
137k views

Sql Server Maintenance Plan - Best Practices on Tasks and Scheduling

I am tasked with devising a maintenance plan for our Sql Server 2005 databases. I know for backups I want to do a daily full database backup and transactional log backups every 15 minutes. My problem ...
43
votes
10answers
48k views

How do I copy a table with SELECT INTO but ignore the IDENTITY property?

I have a table with identity column say: create table with_id ( id int identity(1,1), val varchar(30) ); It's well known, that this select * into copy_from_with_id_1 from with_id; results in ...
41
votes
5answers
44k views

Can I launch a stored procedure and immediately return without waiting for it to finish?

We have a stored procedure that users can run manually to get some updated numbers for a report that's used constantly throughout the day. I have a second stored procedure that should be run after ...
38
votes
4answers
42k views

Hard and Fast rule for include columns in index

Is there any hard and fast rule to decide what columns and in which order it should be put in Included in non clustered index. I was just reading this post https://stackoverflow.com/questions/1307990/...
35
votes
2answers
108k views

How do you stop, take offline, and delete a SQL Server database in recovery?

I have a development database which has entered recovery mode on restart, and has been recovering for the last hour or so. I need to either stop the recovery, or kill it in some way. I don't care ...
33
votes
3answers
50k views

What is the difference between Shrink Database and File?

DBCC ShrinkDatabase() DBCC ShrinkFile() Do I need to run both DBCC commands in order to shrink the database? What is the difference between these two above?
32
votes
5answers
12k views

Downgrading from SQL Server 2008 to 2005

Database files that are built using SQL 2008 are not compatable with 2005. Is there a work around?
32
votes
2answers
58k views

Which one is more efficient: select from linked server or insert into linked server?

Suppose I have to export data from one server to another (through linked servers). Which statement will be more efficient? Executing in source server: INSERT INTO [DestinationLinkedServer].[...
29
votes
10answers
156k views

How can I get the correct offset between UTC and local times for a date that is before or after DST?

I currently use the following to get a local datetime from a UTC datetime: SET @offset = DateDiff(minute, GetUTCDate(), GetDate()) SET @localDateTime = DateAdd(minute, @offset, @utcDateTime) My ...
29
votes
7answers
52k views

What is the most efficient way to get the minimum of multiple columns on SQL Server 2005?

I'm in a situation where I want to get the minimum value from of 6 columns. I've found three ways so far to accomplish this, but I have concerns with the performance of these methods and would like ...
28
votes
5answers
79k views

How do I run a large script with many inserts without running out of memory?

Question: I have a script with around 45 thousand insert from select statements. When I try and run it, I get an error message stating that I have run out of memory. How can I get this script to run? ...
28
votes
2answers
33k 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 article ...
28
votes
3answers
26k views

Are Views optimized when I add a WHERE clause to them?

Does it make a difference if you filter a View inside or outside the View? For example, is there any difference between these two queries? SELECT Id FROM MyTable WHERE SomeColumn = 1 Or SELECT Id ...
27
votes
4answers
43k views

What's better for large changes to a table: DELETE and INSERT every time or UPDATE existing?

I am making a project where I need to change around 36K records in one table daily. I'm wondering what will perform better: delete rows and insert new ones, or update already existing rows For me it ...
26
votes
3answers
31k views

Is it possible to restore sql-server bak and shrink the log at the same time?

We have a bak file from a client that we have transferred to our developer offices for problem investigation. The backup is currently 25GB and the restored database is about the same size however it ...
26
votes
2answers
5k views

Optimization issue with user defined function

I have a problem understanding why SQL server decides to call user defined function for every value in the table even though only one row should be fetched. The actual SQL is a lot more complex, but I ...
26
votes
6answers
125k views

SQL Server database size didn't decrease after deleting large number of rows.

I'm no good in SQL, but I've got a database to maintain. There's almost no place left for it, so I've decided to delete all the data for, let's say, year 2008. After executing delete query (had ...
23
votes
1answer
24k views

What exactly does “No Join Predicate” mean in SQL Server?

MSDN "Missing Join Predicate Event Class" says it "indicates that a query is being executed that has no join predicate". But unfortunately it does not seem to be as easy as that. For example, very ...
22
votes
4answers
4k views

Is 'Avoid creating a clustered index based on an incrementing key' a myth from SQL Server 2000 days?

Our databases consist of lots of tables, most of them using an integer surrogate key as a primary key. About half of these primary keys are on identity columns. The database development started in ...
22
votes
2answers
25k views

Performance difference between Clustered and Non Clustered Index

I was reading Clustered and Non Clustered Indexes. Clustered Index - It contains Data Pages. That means the complete row information will be present in the Clustered Index Column. Non Clustered ...
22
votes
5answers
10k views

Why are periodic restarts required to keep my instance performing well?

We've got a production DB server on SQL 2005. Everything runs normally for a while, but after a couple weeks we see a notable performance drop. Only restarting SQL Server brings performance back to ...
22
votes
4answers
70k views

Grant permissions to run an SQL server job

I have a job on my MSSQL server 2005, that I want to allow any database user to run. I'm not worried about security, since the input to the job's actual work comes from a database table. Just running ...
22
votes
2answers
22k views

What can cause a mirroring session to timeout then failover?

We have two production SQL Servers running SQL Server 2005 SP4 with cumulative update 3. Both servers run on physical machines that are identical. DELL PowerEdge R815 with 4 x 12 core CPUs and 512GB (...
20
votes
2answers
23k views

How badly do SQL Compilations impact the performance of SQL Server?

I am profiling an instance of a SQL Server 2005 and I, via PerfMon's SQLServer:SQL Statistics - SQL Compilations/sec metric, I see that the average is about 170 or so. I whipped out SQL Profiler ...
20
votes
2answers
59k views

Rebuilding the transaction log

We have a very large database (~6TB), whose transaction log file was deleted (while SQL Server was shut down. We have tried: Detaching and reattaching the database; and Undeleting the transaction log ...
20
votes
5answers
6k views

Using IF in T-SQL weakens or breaks execution plan caching?

It has been suggested to me that the use of IF statements in t-SQL batches is detrimental to performance. I'm trying to find some confirmation or validate this assertion. I'm using SQL Server 2005 ...
19
votes
3answers
23k views

How does shrinking a SQL Server log file affect performance?

I have a SQL Server 2008 database that has a data file of some 2GB in size, but the log file is over 8GB. With pre-2008 databases I could use the 'Backup log' and the TRUNCATE_ONLY option but this is ...
19
votes
5answers
18k views

Why do linked servers have a limitation of 10 branches in a CASE expression?

Why does this CASE expression: SELECT CASE column WHEN 'a' THEN '1' WHEN 'b' THEN '2' ... c -> i WHEN 'j' THEN '10' WHEN 'k' THEN '11' END [col] ...
19
votes
3answers
7k views

How can I tell what recovery model my SQL database has?

Is there a SQL command I can run to determine the recovery model of my database? I want to know if its full recovery or not.
19
votes
3answers
32k views

EXCEPT operator vs NOT IN

The EXCEPT operator was introduced in SQL Server 2005 but what is the difference between NOT IN and EXCEPT ? Does it do the same? I would like a simple explanation with an example.
19
votes
1answer
20k views

Primary key with “NOT FOR REPLICATION” option

I have recently taken over a project, and I have discovered that in most tables the primary key has the property "NOT FOR REPLICATION". I'm no DBA, but surely in most databases, a record without a ...
19
votes
4answers
12k 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 ...
18
votes
3answers
5k views

Why would someone put `where 1=1` in a query?

I came across a view in our database today where the first statement in the where clause was where 1 = 1. Shouldn't this return true for every record? Why would someone write this if it isn't ...
18
votes
2answers
33k views

What are database statistics, and how can I benefit from them?

I've heard mention of statistics that SQL Server keeps by default. What are they tracking, and how can I use this information to improve my database?
18
votes
2answers
19k views

Moving from SQL 2005 [SQL_Latin1_General_CP1_CI_AS] to 2008 - will I lose any features by using 'backwards compatibility'

We're moving from SQL 2005 [Instance and DB have collation of SQL_Latin1_General_CP1_CI_AS] to SQL 2008 [which defaults to Latin1_General_CI_AS]. I completed a SQL 2008 R2 installation, and used ...
18
votes
4answers
37k views

How can I backup a large SQL Server database without impacting performance?

We've had reports of queries running slowly or timing out early in the morning, and the only job I see running that I think could affect this is our database backup job. The database itself is about ...
18
votes
2answers
3k views

Can foreign keys cause deadlocks and hinder READ COMMITTED SNAPSHOT?

This is a followup question from: https://stackoverflow.com/questions/7684477/is-it-possible-to-set-transaction-isolation-level-snapshot-automatically I'm still having deadlock/timeout situations in ...
18
votes
2answers
7k views

SQL Server how to get around the transaction log filling up when updating a column to an int

I have a SQL Server 2005 table called BRITTNEY_SPEARS_MARRIAGES and it has the following columns: MarrigeId tinyint, HusbandName varchar(500), MarrigeLength int Now I have another table ...
17
votes
2answers
1k views

Is there any tangible difference between a unique clustered index and a clustered primary key?

I understand that there may be a difference in meaning or intent between the two, but are there any behavioral or performance differences between a clustered primary key and a clustered unique index?
17
votes
3answers
9k views

Can I move rows between partitions by updating the partition key?

I would think that this would be a fairly simply question, but I've actually had a difficult time finding an answer for this. The question: Can you move rows of data within a partitioned table from ...
17
votes
4answers
9k views

Is there any benefit of a primary key that comprises all columns of the table?

I have a table with four columns that are all non-nullable, and the data is such that all four are needed to distinguish a unique record. This means that if I were to make a primary key, it would need ...
16
votes
3answers
1k views

Slow update on large table with subquery

With SourceTable having >15MM records and Bad_Phrase having >3K records, the following query takes almost 10 hours to run on SQL Server 2005 SP4. UPDATE [SourceTable] SET Bad_Count= ...
16
votes
2answers
14k views

Create View in specified database with dynamic sql?

I am writting a dynamic sql to drop and create view in different database. So I wrote: set @CreateViewStatement = ' USE ['+ @DB +']; CREATE VIEW [dbo]...
16
votes
3answers
116k views

SQL Server Restore a SINGLE table from a backup [duplicate]

on SQL Server 2005, we do a weekly full backup with nightly incremental backups. I want to know if it is possible to restore a single table from a backup, either to the source database or a ...