All versions of Microsoft SQL Server (not MySQL). Please also add a version-specific tag like sql-server-2016 if that is relevant to the question.

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2answers
374 views

Find missing indexes

tool available to find missing indexes in mssql 2008 ? can we find the missing index using Database Engine Tuning Advisor
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2answers
3k views

Freeing space after deleting rows [duplicate]

I have a SQL Server 2008 instance and one table is quite large (log data) so I delete old logs. Now I start to read articles on this problem, here is one. As I see it there is no solution! If I ...
1
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1answer
262 views

UPLOCK to avoid multiple reads

Given the following table structure... Orders ====== OrderId int PK OrderEvent =========== OrderEventId int PK OrderId int FK EventTypeId int FK I've got multiple concurrent processes SELECT-ing ...
2
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1answer
150 views

Is there a way to auto resume an incomplete job after sql server restart?

I ran into problem of job stopped after the sql server restart. Is there a way to auto resume an incomplete job after sql server restart? Thanks!
4
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2answers
3k views

Comparing binary 0x and 0x00 turns out to be equal on SQL Server

It seems that SQL Server considers 0x and 0x00 equal values: SELECT CASE WHEN 0x = 0x00 THEN 1 ELSE 0 END This outputs 1. How can I get true binary bit-for-bit comparison behavior? Also, what are ...
5
votes
5answers
74k views

How to access a SQL Server database from other computer connected to the same workgroup?

I have created a C# application which uses a SQL Server database. I have other computers connected to me and to each other in a workgroup. I have shared my C# application with others. When they open ...
3
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3answers
3k 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 ...
1
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1answer
2k views

Unable to drop non-PK index because it is referenced in a foreign key constraint

I have a table named MyTable. The primary key is an identity int column named MyTableID. There is a unique clustered index on the PK column MyTableID named PK_MyTable. I noticed there is an ...
1
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1answer
956 views

DBCC checkdb showing failure after a restore

We restored a backup into a new database. After running a few delete queries we received the following message: Msg 824, Level 24, State 2, Line 1 SQL Server detected a logical ...
3
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1answer
3k views

What is the difference between TABLESAMPLE(10) and TABLESAMPLE(10 PERCENT) in SQL SERVER 2012

My understanding of the use of TABLESAMPLE is that it returns the top n percent of rows in a result set where TABLESAMPLE(n) So I wrote the following queries to just check (as I'm learning T-SQL) ...
1
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1answer
600 views

Replication is missing a specific set of rows on subscriber

So I've got two servers, we'll call them Server A and Server B. Server A has a table, Table 1, which gets replicated to Server B. Server B has a table, Table 2, which gets replicated to Server A. ...
3
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3answers
492 views

Trace and analyze logs on SQL Server

I am using an SQL Server 2012 on windows datacenter 2012 I have encountered a situation where i think some virus/sql injection had heart my database, Some data on my table had changed to weird ...
2
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2answers
299 views

Large number of VLF and shrinking the log

If there are lot number of VLF then it will effect the performance of the queries. I saw that solution is to shrink the log file. But shrinking the file is also bad. So how to take control of whole ...
4
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2answers
1k views

Trace flag and which need to be turned off and Why

In SQL server there are so many trace flags. Why some of them need to be turned off. Some where i saw that trace flag 8017 need to be turned off. So i want to know which trace flag need to be tuned ...
0
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1answer
1k views

Migrating from SQL Server to MySQL using MySQL Workbench tool

I'm trying to migrate few tables from SQL Server to MySQL using MySQL Workbench migration wizard. All work fine for structure migrations but when I go to the data migration section it throws an error ...
1
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0answers
476 views

Allow developers to run database maintenance

We use the database solution by Ola Hallengren. We're trying to give our developers a way to run the maintenance stored procedures after they do an ETL. Our developers have locked down permissions. ...
1
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1answer
907 views

Find Duplicate Customers

Okay... I have a table that has customers: -- Individual Table * ID (Internal Unique ID) * IndividualID (External Unique Individual Identifier) * Last Name * First Name * Birth Date * SSN * ... The ...
1
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1answer
119 views

Can scheduled and continous replication configurations exist side-by-side on the same master/slave servers?

Environment We have a core sql server cluster. This cluster contains some databases that get replicated to a load-balanced sql cluster of currently 3 servers. These databases are replicated each 12 ...
1
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2answers
746 views

Where can I find scenarios to work through T-SQL [closed]

I've been working through the exam guides for the new 70-461 MCSE data exams and i'm at a point where I want to practice my T-SQL. Does anyone know of any good resources whereby scenarios are posed ...
7
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4answers
7k views

How to make SSMS upper case keywords

I recently started using Management Studio 2012. When using MySQL Workbench, a handy feature was that I could stay all in lower case and any reserved word (like SELECT, INSERT) would convert to upper ...
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2answers
2k views

SQL Server transaction log backups: test whether tail log follows last known log backup

We are using SQL Server with full recovery mode. Given a full backup and a series of log backups, we would like to be able to check whether the log chain is complete from the last full backup to the ...
3
votes
1answer
244 views

Optimizing complex join predicates [closed]

Table Definitions CREATE TABLE [dbo].[Pin_Mtg] ( [MtgId] bigint NULL, [CntyCd] char(5) NOT NULL, [BatchDt] int NOT NULL, [BatchSeq] int NOT NULL, [MtgSeq] tinyint NOT NULL, ...
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1answer
5k views

AWE memory usage growing with SQL Server 2012

I've got a problem with my SQL Server 2012 installation on my Windows 2008 R2 x64 box. Because my memory seemed to be rapidly disappearing (according to the Task Manager graph), but I couldn't see ...
2
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2answers
1k views

How can you tell when a query plan reuse is causing performance problems

When investigating a performance issue, a workmate suggested running DBCC FREEPROCCACHE to clear the plan cache. He came to this conclusion after noticing performance improved after a reboot. This ...
0
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1answer
1k views

Msg 1833, File 'ABC.ndf' cannot be reused until after the next BACKUP LOG operation

I am having a Database. The size of my database is near about 4GB(Only .mdf file). In that database only few tables present which have the maximum data of database. One of them and the biggest table ...
7
votes
2answers
243 views

'Cleanse' a SQL Server database file created with Instant File Initialization enabled?

I have Instant File Initialization enabled on our SQL Server, so the 'empty' part of the database file is not zeroed before being allocated. My understanding is that this means that the file could ...
2
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2answers
879 views

configure sqlcmd to automatically run your script every time it starts?

I have created a sqlcmd startup script that i have stored in c:\myscript.sql, and I want it to run every time i start sqlcmd. how do I configure sqlcmd to automatically run your script every ...
23
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2answers
3k views

Does the order of columns in a PK index matter?

I have a few very large tables with the same basic strucure. Each one has a RowNumber (bigint) and DataDate (date) column. Data is loaded using SQLBulkImport every night, and no "new" data is ever ...
4
votes
1answer
16k views

Changing a column data type from datetime to float

I have a table with a float column. All values in this column for all records are NULL. I want to change the data type to datetime. I executed the query: ALTER TABLE MyTable ALTER Column MyColumn ...
2
votes
1answer
571 views

DBCC CHECKDB ERROR Msg 8992

I have got the Following Error When i ran the checkDB over the database. What are the steps can be taken to resolve the issue. Without affecting the users. Msg 8992, Level 16, State 1, Line 2 Check ...
4
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1answer
2k views

Is data encrypted by ENCRYPTBYPASSPHRASE() protected by the service master key?

In a recent question, What does the Service Master Key protect?, it was suggested that the service master key protects, among other things, data encrypted by ENCRYPTPASSPHRASE(). Is this true?
7
votes
2answers
7k views

Database size - MDF too large?

I'm maintaining a SQL Server 2005 database which hosts approximately 2.9Tb of data (2 x 1.45Tb - I have a RAW schema and an ANALYSIS schema so basically two copies of the data ingested). The recovery ...
6
votes
4answers
12k views

EF Code First uses nvarchar(max) for all strings. Will this hurt query performance?

I have some databases created using Entity Framework Code First; the apps are working and in general I'm pretty happy with what Code First lets me do. I am a programmer first, and a DBA second, by ...
1
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4answers
4k views

restore could not start database

Restore failed for Server 'servername'. (Microsoft.SqlServer.SmoExtended) System.Data.SqlClient.SqlError: RESTORE could not start database 'ECP'. (Microsoft.SqlServer.Smo) The database is ...
1
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1answer
864 views

Advice needed for Querying DateTimeOffset data by end users

We are building an Operational Data Store (ODS). The data is coming from our production databases which are located in the United States and Asia. The data in our production databases store date/time ...
3
votes
1answer
9k views

Passing column names dynamically to UNPIVOT

I have a table with following data First Second Third Fourth Fifth Sixth 2013-08-20 2013-08-21 2013-08-22 2013-08-23 2013-08-24 2013-08-25 And ...
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1answer
586 views

SQL Server 2008 component is cluster-aware? [closed]

Which SQL Server 2008 components are cluster-aware? Notification Services Tuning Advisor Full Text Search Reporting Services Integration Service
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1answer
3k views

Schema Change/Update script for Database deploy [closed]

I have a need to change the database schema . I'm planning to write Schema change and update scripts for tracking database changes and updating them. I followed Versioning Databases – Change Scripts ...
5
votes
2answers
2k views

Dividing DBCC CHECKDB over multiple days

I'm working on implementing Paul Randal's method of manually spreading DBCC CHECKDB over several days for very large databases, which basically consists of: Dividing the tables in the database ...
3
votes
1answer
615 views

Index will be removed

I'm trying to simply change the length of a column within a table through SQL Server Management Studio, but receive a 'Validation Warning': 'MyTable' table -Warning: The following schema-bound ...
3
votes
1answer
2k views

How to troubleshoot db/app latency during transaction log backup

I have an application that uses a SQL server (2008 R2) database and we are periodically having performance problems with the application and it coincides with our 15-minute transaction log backups. ...
0
votes
3answers
968 views

Dividing in SQL

can anyone explain to me why this query returns 0.000? SELECT CAST(20/1024 AS NUMERIC(10,3)) I am just trying to do a simple conversion of MB to GB Thanks
1
vote
1answer
64 views

SQL SERVER 2012 error [closed]

am trying to restore a backup, the backup is from a database in the current instance, want to restore the backup with a different name for test purposes, this was possible in 2008 R2 but in 2012 its ...
3
votes
2answers
829 views

Truncated copy of a DB for a developer

I have an access to a DB (SQL Server 2008 R2). The size of the DB is about 40GB. I am a developer and I'd like to have a local copy of that DB to be able to work offline. Is there an easy way to get ...
5
votes
1answer
270 views

My log file is large, what should I do? [duplicate]

My transaction log is larger than I'd like it to be, and I want to know how I can fix that.
1
vote
2answers
1k views

Error in running SQL Server script

I copied oldDatabase as newDatabase. Modified newDatabase's schema. Meanwhile, oldDatabase's data are processing and updating. I want to copy oldDatabase's data to newDatabase. What I have done ...
1
vote
2answers
886 views

Run Multiple Scripts In One Transaction Across Multiple Servers [duplicate]

We have deployment scripts that we need to run on databases that are spread across multiple servers. One script only runs on one database, but the scripts depend on each other. We are looking for a ...
3
votes
2answers
3k views

SQL Server 2012 High Availability on VMware virtualization

We're going to host a large SQL Server 2012 under a VMware virtualization and we need it to be highly available. These are the three options I found supported, but couldn't find a lot of info and ...
0
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0answers
19 views

SQL Server 2012 High Availability on VMware virtualization [duplicate]

We're going to host a large SQL Server 2012 under a VMware virtualization and we need it to be highly available. These are the three options I found supported, but couldn't find a lot of info and ...
0
votes
1answer
639 views

Renaming Sql Server database unusual result

This is some behaviour I observed from renaming databases. What is the cause of this? The example is simplified for the purposes of this question. CREATE DATABASE [Database_A] GO CREATE DATABASE ...