All Questions

3
votes
1answer
1k views

What is object Server?

As I was reading article I came across IBM's site about object Server. What actually is Object Server and what are it's uses? Can this be explained for a beginner?
2
votes
1answer
710 views

Return Output from SQL Function using command line SQLCMD

I have a SQL Function that returns an Integer as the Output. I need to execute it via sqlcmd and I only want to get it's integer output. However right now I'm getting back this type of output: -----...
1
vote
2answers
880 views

MySQL UPDATE Performance Issue

I'm running out of ideas on a performance bottleneck I'm seeing on one of my projects. The table in question is pretty small, with only 5396 records. However, I'm seeing queries like this show up in ...
2
votes
2answers
119 views

Extra tables are added when I create a new Database

This is a really weird problem. When I create a new DB from a script I'm getting extra tables added. These aren't system type tables but regular tables that look like they may have come from a past ...
13
votes
4answers
23k views

One Big Database vs. Several Smaller Ones

We have a situation were we can (A) deploy instances of an applications in one MySQL database using table prefixing or (B) use different MySQL databases for each instance of the application, for e.g., ...
13
votes
5answers
9k views

SQL Server 2008 Full Text Index Never Seems to Complete

Our website has a SQL Server 2008 R2 Express Edition database with full-text indexing for our website search. Each time a new record is added or updated in one of the indexed tables, the indexing ...
10
votes
3answers
4k views

How recording of every change of a row in a database is generaly stored?

In a project I'm working on, every change to the rows in some tables of the database must be tracked for further audit or rollback. It must be easy to find who modified the row, from which IP address ...
13
votes
1answer
146k views

How to determine used/free space within SQL database files? [duplicate]

I normally use the following method to determine the free/used space within each file of a database: Select *, fileproperty(name, 'SpaceUsed') as Used From dbo.sysfiles This returns total and used ...
0
votes
1answer
676 views

Oracle: Extract Graphical Database Representation [duplicate]

Possible Duplicate: Oracle Creating ER Diagrams and Data Dictionaries How can I extract a graphical (schema) representation of an Oracle database (tables and their relationships; with colums and ...
1
vote
1answer
3k views

High PageIOLatch_SH Waits with High Drive Idle times

We are experiencing high volume of PageIOLatch_SH waits on our database (row counts in the Billions). However it seems that our drive Idle time Percentage hovers around 50-60 percent. CPU usage is ...
11
votes
2answers
15k views

Why Isn't the SQL Server Agent Service Set to Automatic Startup by Default?

After a default install of SQL Server 2008 R2, the SQL Server Agent process seems to be set to manual startup. What is the reason for this? Is setting to automatic a bad idea or pointless for some ...
12
votes
4answers
520 views

Determining that Indexes on a table are unused

I’ve been running this script to try to find extraneous indexes select o.name as TableName, i.name as IndexName, p.reserved_page_count * 8.0 / 1024 as SpaceInMB, s.* from sys....
3
votes
5answers
2k views

Pros and cons of having one table per entity vs. having a shared table with an extra column indicating the entity type

I am working on a database design and am wondering about the pros and cons of two setups. I am going to collect data about two types of entities, lets say cars and boats. The structure of the data ...
1
vote
4answers
2k views

How to avoid select combinations created with multiple parameters (with value or without value) passed in to stored procedures for a select in sql?

I've a situation where 4 parameters are passed to a stored procedure, on the basis of the existence of these parameters i need to modify the where condition of my select query. Simply i can use IF-...
3
votes
1answer
1k views

How can I get MySQL to use the value returned by a function as a default?

I have a pre-existing table that has a column to that can hold a UUID. I'd like to be able to define a default such that new rows coming in (from legacy systems) will still get a UUID defined, via ...
6
votes
5answers
1k views

Are these good indexing guidelines?

I use indexes regularly but it's still hard for me in certain conditions to know if they are helping or hurting. There are a few guidelines I follow, but I am not sure if they are good nor am I sure ...
3
votes
1answer
959 views

Can High Water Mark be cleared?

Lately I experience below errors when restoring db2 database SQL2043N Unable to start a child process or thread SQL1084C Shared memory segments cannot be allocated db2stop and then db2start always ...
6
votes
2answers
9k views

How to know if I am running SQL Server 2008 R2?

I ran @@version. This is what it gave me: Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64) Sep 16 2010 19:43:16 Copyright (c) 1988-2008 Microsoft Corporation Enterprise Edition (64-bit) on ...
6
votes
2answers
3k views

Error on import of mysqldump file - Illegal double value found during parsing

I am currently getting the following error while trying to import / restore a mysqldump file: ERROR 1367 (22007) at line 445: Illegal double '1.79769313486232e+308' value found during parsing I ...
2
votes
3answers
2k views

SQL Reporting Services - T2Embed.dll missing

When generating a report in SSRS, I receive the following error: There was an error generating your report. Please refer to item 673778174106859 for additional diagnostic information. There was an ...
13
votes
3answers
17k views

Best way to design tournament database

I'm creating a webpage for placing bets on all matches of the upcoming Euro 2012 football tournament. Need some help deciding what approach to take for the knockout phase. I have created a mockup ...
4
votes
2answers
2k views

How to identify connections using implicit transactions?

I'm investigating a blocking issue that I believe is related to implicit transactions not being committed or rolled back. How can I identify connections that have turned the implicit transactions ...
2
votes
1answer
206 views

Oracle bitand inconsistent behaviour

I'm working on a legacy database using bitmaps for searching. I'm using the bitand function to find bitmaps that match a given bitmask but I'm getting the wrong results: the bitand between two numbers ...
3
votes
1answer
623 views

Oracle Materialized View

I need your help with a issue on Oracle Materialized View. I created the Materialized View using the following command: CREATE MATERIALIZED VIEW SNAP_TEST TABLESPACE tbs NOCACHE LOGGING NOPARALLEL ...
7
votes
1answer
20k views

Column size with datatype decimal

According to BOL for SQL Server 2008 R2 the data type decimal requires the following storage bytes: Precision Storage bytes 1 - 9 => 5 10-19 => 9 20-28 => 13 29-38 ...
0
votes
2answers
2k views

In SQL Server 2008, is possible to one database subscribe 2 publications for the same database? (merge replication)

I'm trying to set up an high availability architecture using merge replication. I have 3 databases, and I'm trying to keep them all up to date with merge replication. So far I've manage to create one ...
4
votes
1answer
6k views

Meaning of SSMS database icon preceded by scroll with red x

SSMS 2008 R2, connecting to a 2008 instance shows the above glyph in SSMS Object Explorer. None of our other instances show that icon. I've moused over it in the vain hopes that I'd get a useful ...
2
votes
2answers
432 views

UDF And Query Plan Caching

I have a multi statement table value UDF. That builds a temp table then returns it as the result. The first time its executed it takes 5 seconds, subsequent executions with the same parameters take 1 ...
28
votes
2answers
177k views

Oracle: Quick way to list all database links

The title says it all, is there a way to quickly list all the current database links in oracle? Something along the same lines as this, which lists the current user's tables: select * from ...
2
votes
2answers
6k views

Solving high page load time using SQL Profiler

I'm looking into a performance of a login page taking 10-13 seconds to load. I'm using a DEMO database to test the performance and tweak to see any improvement. I'm using SQL Profiler to capture what ...
2
votes
1answer
460 views

MySQL unclearness about DataType TIMESTAMP with DefaultValue CURRENT_TIMESTAMP

In MySQL InnDB engine I created TableColumn with data type TIMESTAMP and put there as default value CURRENT_TIMESTAMP, but this value are always changed to CURRENT_TIMESTAMP when I update that by ...
1
vote
2answers
6k views

Confused about the Oracle CONTROL_FILES initialization parameter

This is the explanation of this parameter from Oracle. This is the description of the description in the explanation. From the documentation we know that this parameter is not modifiable (Modifiable: ...
1
vote
1answer
939 views

Doing a bulk insert in SQL Server

I have to do the insert operation in the db as follows, I create an item I create 5-10 properties for that item, all these data i get in the form of a collection of objects. I donot want to ...
1
vote
1answer
7k views

The process could not execute 'sp_replcmds' on 'S15415940'. Cannot execute as the database principal because the principal “dbo” does not exist [duplicate]

Can anyone show me the way to fix these error messages: The process could not execute 'sp_replcmds' on 'S15415940'. (Source: MSSQL_REPL, Error number: MSSQL_REPL20011) Cannot execute as the ...
2
votes
1answer
7k views

When are we supposed to set default-character-set for the client?

I'm trying to understand when I'm supposed to set/force default-character-set for the client. The documentation states: You can force client programs to use specific character set as follows: ...
5
votes
1answer
1k views

Load Balancing / MPP with Postgres 9.1

I'm trying to setup a testbed for bigdata analytics (basically around 2 to 3 TB base, slight write [only feeding the db], but possibly read intensive queries for analytics purposes). Since I'm ...
1
vote
1answer
533 views

Read .sql file into a database

I created a sql database and filled it with some good data. Now I'm trying to move all the stored procedure over to another database instance. I exported the entire source database, including beloved ...
7
votes
2answers
3k views

Connecting from SSMS to an EC2 SQL Instance

I have an EC2 server running SQL2008 R2. I opened the port 1433 and successfully tested with yougetsignal.com/tools/open-ports. I have set the SQL Server to Accept Remote Connections. I have set the ...
8
votes
1answer
633 views

Best tool to optimize SQL Server (not the queries, but the database itself)

Does anyone know what is the best tool to optimize an entire SQL Server database? I'm not talking about how to write the queries but more how to manage the database file, indexes, paging and ...
0
votes
1answer
187 views

Maintenance Plan produces BAK files I cannot use

I have a maintenance plan that does the following: Check Database Integrity Shrink Database Reorganize Index Rebuild Index Update Statistics Clean Up History Backup Database Maintenance ...
2
votes
2answers
159 views

How can I prevent/detect that a end user restored a backup?

We need to prevent the SQLServer 2008 .mdf file from being replaced by the end user of our application. we collect data in the MDF that is important to us. If the user saves an old copy of the MDF, ...
4
votes
2answers
1k views

Personal Instance on Personal Computer

I finally got my hands on a copy of SQL Server 2008 R2 Developer Edition. I have installed an instance on my server at home. I wanted to get all the Management Tools (SSMS, Profiler, etc.) on my ...
1
vote
2answers
378 views

Best type to use in a composite key when one of the values varies in type

I am building a data store for the content of multiple blog sites which have been scraped. Each of these sites is going to have an entry in a Blog table BlogId Url ...
3
votes
2answers
364 views

Recovering from Oracle host OS disk failure (options)?

If an Oracle host OS has a complete disk failure and the host can be restored (assuming from a recent clone of the host OS disks) from backup, is it possible to then point the host to the existing ...
15
votes
2answers
81k views

“Copying to tmp table” extremely slow

This is my example of query: SELECT nickname, CASE class_id WHEN 1 THEN 'Druid' WHEN 2 THEN 'Necromancer' WHEN 3 THEN 'Mage' WHEN 4 THEN 'Priest' WHEN 5 THEN '...
7
votes
2answers
4k views

Is DB2 more reliable and stable compared to PostgreSQL or MySQL?

Always i was using MySQL or PostgreSQL for my projects such as Web/Desktop apps. I had data loss few times and thanks to old backup i was always up and running. But for a recent project for Airport, ...
1
vote
4answers
12k views

Attaching database to the SQL server

I have the following error The database 'Test' cannot be opened because it is version 661. This server supports versions 655 and earlier. A downgrade path is not supported. Usually this kind ...
2
votes
2answers
4k views

Can't connect to/from SQL Server 2008 from my Windows 2008 server

I have a server with: Windows 2008 Server SQL Server 2008 enterprise From my server using SQL Server Management Studio, I can't logon to any SQL Server and vice verse, I can't connect to my SQL ...
5
votes
3answers
1k views

Books on optimizing and refactoring SQL stored procedures

Can you please recommend resources to write efficient store procedures, refactor and optimize them? EDIT: - jcolebrand ♦ The intent of the answers to this post may be books or non-transient blogs. ...
3
votes
2answers
2k views

MySQL vs SQLite on Amazon EC2

I have a Java program and PHP website I plan to run on my Amazon EC2 instance with an EBS volume. The program writes to and reads from a database. The website only reads from the same database. On ...

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