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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1answer
194 views

Is indexing binary?

The scenario: When a user updates some information - the correct row must be found and updated. I'm debating between two options: Let the server search through all of the rows (-slow). But be ...
15
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2answers
580 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 ...
2
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1answer
83 views

indexes with unspecific columns

I have a third party database in which a large number of the tables have a 'companyID' column, and most of the queries against those tables include companyID = @companyID in the where clause. [EDIT: ...
0
votes
1answer
115 views

How to retrieve whether database has any tables?

Knowing to use SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='BASE TABLE' to query for a list of tables, I'm currently finding no way to retrieve a list of non-system tables only. I.e. ...
1
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1answer
27 views

Security access to a table

I have a database and table dbo.Test_Table, with list of Users under Security -> Users. those users have access to all the tables in my database. I would like to know how do I assign certain users to ...
1
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1answer
61 views

Is there a limit on the number of blobs storable in SQL Server with filestream?

I use filestream to store blobs (files). I use SQL Server 2008 R2 Some customers have 60k files (50GB). They ask me if there is a limit after which, also because of NTFS, there will be problems. ...
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0answers
909 views

SSRS - Report using Stored Procedures, Cascading Parameters and Views

I am looking for a non-trivial Microsoft SQL Server Reporting Services example that shows the efficient use of the following for calculated columns such as: Profit = Revenue - Expense Margin = Profit ...
0
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3answers
52 views

No CREATE_TIMEDATE column, can I still export records inserted within last 24 hours?

A database was designed almost 10 years ago, now I may need to export records inserted from the last 24 hours. Back then, the table design did not include CREATE_TIMEDATE col for these tables. Is ...
1
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1answer
621 views

How different clauses treat Null/Unknow in SQL Server 2012?

(relatively new to SQL and SQL Server) I am reading SQL Server 2012 T-SQL Fundamentals by Itzik Ben-Gan. Autor states that: SQL has different treatments for UNKNOWN in different language ...
1
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1answer
184 views

how service sid operate under the covers?

This question is out of curiosity and it left me in confusion whether service account as any role to play in SQL Server startup and shutdown? Can anybody explain how SQL Server 2008 Service Sids work ...
2
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1answer
64 views

Update only the oldest entry in a table with foreign key criteria

I'm working on a forum website. What I am trying to do is updating the thread Title and Content (first post), which resides in different tables - "Threads" and "Posts". "Threads" "Posts" I'm ...
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1answer
379 views

SQL Server 2012 Not matching Join Query

I have to generate a query output for not matching records. Assuming that i have two tables Table1 and Table2. Both Tables have the columns as DrugName. No Id column. Just the value column. I ...
1
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1answer
51 views

SQL Server generate self-signed SSL certs performance concern?

Read this msdn article and doesn't seem to say if it keeps using the same self-signed cert after one is automatically generated. If SQL Server generates a new SSL cert upon every connection (anyone ...
0
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2answers
134 views

SQL Server Date Conversion

On applying the where condition : WHERE DateFilled BETWEEN '02/01/2014' AND '02/28/2014' My syntax is not detecting the values which are filled on 02/28/2014. If I write the syntax as WHERE ...
2
votes
1answer
659 views

Disk Latency vs Throughput

I've searched the web for a little while and haven't found an answer I'm confortable with. I am testing a SQL Server on a VM that was presented new disc. If disk latency is reduced, shouldn't ...
3
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2answers
572 views

SQL Server Memory Issues

We have a SQL server that appears to be leaking memory. Memory consumption linearly increases over time until the server is completely out of memory, causing major performance issues. The SQL server ...
5
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3answers
2k views

Encountered unexpected growth Transaction log file size

We are using SQL Server 2008 R2 Standard version, we created Maintenance plan Rebuild Index, Reorganized Index and update Statistic , Scheduled Every day at 1 AM. After Executing this Maintenance ...
0
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2answers
1k views

SSIS and Excel import

I am using VS2012 and creating a package on a 64bit machine to import some data from a .xlsx file. My question is that I am getting an error for the Excel connection manager, do I need to install ...
3
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1answer
679 views

SQL Script to Drop old AD logins, Inactive SQL Logins and all related Users

Related Question: SQL Server script to delete accounts no longer in Active Directory Whilst the above question points out the rather handy sp_validatelogins procedure, i'd like to extend this ...
2
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1answer
280 views

Two relations to same table in SQL Server

I've got two tables. When I delete a row in Table1, I want to set the ID of that row in all the rows of Table2 to NULL. I've got two relationships on Table1. The problem is: I can only set one delete ...
1
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2answers
375 views

Filter by value or show all if no value

I have 2 tables: records and access_rights Access table has list of permission for certain and should be used to filter records based on rules: function field is mandatory object field is ...
0
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1answer
46 views

Should I consolidate my SQL instances? [closed]

I'm trying to find an answer to this one with not much luck. I have an MS DB server with our main databases on it. Over time, someone has installed SharePoint and Microsoft Online (365) services ...
1
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2answers
191 views

Changing the SQL Server service account - any additional considerations?

I have inherited a few instances that are running under LocalSystem. I need to change this to a domain account as we are changing our backup strategy to go to a network share and then to tape and I ...
0
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1answer
99 views

Beginner table design

I have been coding in C# for a couple of years where I usually try to follow the 'single responsibility principle' which states that each class should ideally be responsible for only 1 goal. Now I ...
2
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0answers
262 views

Empty Space in buffer pool

I was doing some reading and came across this article from Paul Randal: http://www.sqlskills.com/blogs/paul/performance-issues-from-wasted-buffer-pool-memory/ Using the queries from that article, I ...
2
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0answers
656 views

SQL Server - Same query, same database, different results [closed]

I have a database in SQL Server 2008 with 2 tables. I'm running the following query on Management Studio: select M.FD_BROWSER_SHORT_NAME AS X, Count(1) AS Y from TB_EVENTS E INNER JOIN ...
0
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0answers
457 views

incorrect value from SUM Function

Has anyone seen this before? When doing a simple sum on a table: select sum(column) from table where column is not null I'm receiving the data 1558.39999999999 However, investigation of the ...
1
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1answer
480 views

Restarting SQL Server's services remotely programmatically

I have the need to restart Microsoft SQL Server's group of services on a given computer, remotely, through some sort of programmatic method I can insert into a workflow. I'm looking for the best way ...
3
votes
1answer
410 views

Frequent Delete & Insert, impact on performance

In my application, we have very few updates. Most of the data gets deleted and inserted. My question is, how this will impact the performance? We are using SQL Server 2012. Table statistics (will ...
7
votes
2answers
11k views

High CXPACKET and LATCH_EX waits

I am having some performance issues with a data processing system which I am working on. I have gathered wait stats from a one hour peroid which show a large amount of CXPACKET and LATCH_EX wait ...
1
vote
1answer
93 views

SQL-Server Custom Database Role

I have a created custom Database Role called Managers. Added db_owner to this role. I would like to Deny DROP Database to this custom Role. But the DENY Drop DATABASE TO Managers is not working Any ...
2
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1answer
49 views

SQL Server 2012 + SQL Server 2008R2 on the same VM

I can't immediately find reference to it, but I remember reading somewhere that it's best practice not to mix versions of SQL Server on the same host. I believe the rationale was that often times, ...
0
votes
1answer
409 views

SQL Server: multiple failover cluster instances with disjoint storage

This is for SQL Server 2012. I currently have two datacenters that have separate SANs. I'm using failover cluster instances (FCIs) for server redundancy, and then AlwaysOn Availability Groups (AGs) ...
6
votes
1answer
528 views

OLE DB Sybase Connection Failing

I have a connection to a Sybase database which we stage in a SQL Server 2008R2 database. I can connect the the database and the connection tests out fine. I am using an OLE DB source with a Sybase ...
1
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2answers
130 views

Backing up my SQL Server System Databases

I'm trying to create a recurring scheduled job to fully backup the master, msdb and model databases, I'm using the Maintenance Plans for SQL Server 2008 R2, in the "Specific Databases to choose from ...
0
votes
2answers
992 views

How can I speed up this query on table with 65 million records

select hash_id, hash_value, substring(T.cri, 1, 7), substring(T.cri, 9, D2.Pos-9), substring(T.cri, D2.Pos + 1, D3.Pos - D2.Pos - 1), ...
6
votes
3answers
15k 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 ...
0
votes
2answers
167 views

SQL Server restore replicated database

I have setup a transactional replication on a sql 2008 database. Then I backup the database.I got following error when I try to restore the database. 'Exclusive access could not be obtained because ...
14
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3answers
17k views

When a previously-fast SQL query starts running slow, where do I look to find the source of the issue?

Background I have a query running against SQL Server 2008 R2 that joins and/or left-joins about 12 different "tables". The database is fairly large with many tables over 50 million rows and about 300 ...
3
votes
2answers
445 views

Ola Hallengren with database mirroring

I am about to setup Ola Hallengrens database maintenance plan. We have our database mirrored and I was just wanting to know if I need to run the script on both my Sql Server instances or only the ...
0
votes
2answers
364 views

why stored procedure performance is very high compared to plain select query

I have a table with more than 2 million rows, with needed indexes. When I run a simple query it takes so much time so I decide to stop executing it; while when I wrap the query in a stored procedure, ...
0
votes
1answer
63 views

SQL query optmization [closed]

This is one thing I have been trying to read from few days. I am not getting any satisfactory explanation anywhere. Tried surfing some blogs and videos in youtube. Appreciate if anyone one can throw ...
0
votes
3answers
100 views

How to script data in deterministic order

When I script data in my database in SSMS Tasks->Generate Scripts and then select data-only it turns out that the insert statements are generated in different order each time when even a smallest ...
0
votes
1answer
103 views

Rebuild Index in system database

I use SQL Server and have multiple indexes in system database whit index fragmentation 30% or more. I don't know that SQL server manage system database index automatically or I want to manage them. ...
1
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2answers
79 views

Known vulnerabilities for when a guest executes a stored procedure on SQL Server

I have a production database with crucial business information. Meanwhile, my company is involved in a project with some other company and we have to exchange some information on a regular basis. How ...
4
votes
1answer
141 views

If user owns a database fixed role are they the admin of the role?

I have SQL Server 2012. When I create a user in "Owned schemas" screen one of the option is fixed database role. If I own a fixed database role: What permissions am I granted? I am the admin of ...
2
votes
2answers
789 views

Where is the list of attached databases stored?

I know database instance names are stored in the registry in subkeys of HKLM:SOFTWARE\Microsoft\Microsoft SQL Server\Instance Names\SQL and the path to master.mdf is stored in ...
2
votes
2answers
2k views

Reduce DB size - SQL Server, SSMS

One of my databases was growing in size a few gigs every day. That was very unusual since it is still in development phase. After small research i discovered that the Even Log table was almost the ...
0
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1answer
46 views

Who and when were changed Database default location settings?

I need to know when and who changed SQL Server Database default location settings. How can I do that?
2
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1answer
50 views

Transaction Log Backups on SQL Server

Running SQL2008 R2 SP2, database is in FULL Mode Is it Possible to shrink the transaction log without putting it into SIMPLE mode? Temporarily cannot take log backus and don't want it to grow until I ...