The discipline of Operational and Architectural Management of Database Systems.

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3
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2answers
658 views

Perl vs Ksh for Unix Database Administration

I realize this is a somewhat more subjective question, but I am looking to the community for guidance. Our company is fairly new to having DBAs. We used to use DB2 for i on the IBM's iSeries servers, ...
0
votes
2answers
403 views

Remote database connection problem?

I have two systems with Windows XP. I have installed SQL Server 2005 on a system and tried to use SQL Server Management Studio Express on both to use the database. I am able to use the database on ...
2
votes
2answers
444 views

How to login in database if we have lost password? [duplicate]

Possible Duplicate: gain admin access to sql express 2008 Is there any idea if we lost our password to login in database using sql express management studio? Is there any place where ...
1
vote
1answer
2k views

listener does not currently know of SID given in connect descriptor in oracle 10g and solaris 10 env

I have a oracle 10g database in solaris 10 system. The SID=OTRS, I can connect to oracle database from local server itself. But I can not able connect from another client. It is returning an error ...
4
votes
1answer
3k views

ERROR: database “dbname” does not exist

According to the documentation, so long as I'm not connected to a database, I can either delete a database in the console using: DROP DATABASE dbname; Or I can drop it using the wrapper tool ...
0
votes
1answer
68 views

PostgresSQL: Cannot get to console under different user name

I normally get to the console in UBUNTU by typing: sudo -u postgres psql But I need to delete a database owned by a different user. When I type: sudo -u username psql It tells me "database ...
2
votes
1answer
3k views

Is there a progress indicator for OPTIMIZE TABLE progress?

MySQL 5.1.4x (Windows) | Innodb I recently purged data from a mySQL DB (a few hundred thousand rows) and I'm planning to use OPTIMIZE TABLE LOGTABLEFOO1,LOGTABLEFOO2,LOGTABLEFOO3; to reduce the ...
5
votes
1answer
546 views

Expanding a partitioned table

I have a table that holds four years of data, where for each month I have a partition that is based on a filegroup with two files. Unexpectedly, I received eight more years of data and prepared the ...
2
votes
2answers
95 views

Searching transaction logs for changes

I currently have a database with an attached CMS. The CMS has about 50+ people with various permission levels that can log in etc... I would like to know if there is a way I can look at the ...
2
votes
1answer
2k views

Solve conflict between affinity mask and I/O affinity mask?

I executed this on one of our SQL Server machines: EXEC sp_configure 'show advanced options', 1 And then executed RECONFIGURE. This presented me with the following error message: The affinity ...
1
vote
0answers
201 views

Database instance keeps restarting

From the past few days, our MySQL database instance has crashed and had to be restarted a few times. My MySQL version is 5.1.57-log. The CPU and memory usage was way below 50% during the crash time. I ...
5
votes
1answer
3k views

Appending backups while overwriting expired sets

I've been reading up on this, but the online documentation is a bit difficult to understand and seems awkwardly written. For example the INIT, NOINIT. One says it will try to overwrite everything. ...
4
votes
1answer
2k views

Take individual MySQL database offline

MySQL does not have any SQL commands or internal mechanisms for making an individual database unavailable / offline moving an individual database Thtis being the case, how can you take an ...
2
votes
2answers
276 views

Database structure for a system with multisite

The system I'm working is structured as below. Given that I'm planning to use Joomla as the base. a(www.a.com),b(www.b.com),c(www.c.com) are search portals which allows user to to search for ...
0
votes
0answers
2k views

Achieve log transfer to standby (Data Guard)

I am not able to transfer my archive logs from primary to standby. I executed the following query: archive log list Database log mode Archive ...
-4
votes
1answer
109 views

Advice for designing a complex/multipart application [closed]

I'm designing a software application for my medical carrier. It is very complicated, with many parts and many small details. Some experts advised me to divide it to parts, then design the database ...
1
vote
1answer
3k views

DBF file exist while user has been dropped?

I am new to Oracle. I have dropped some users from my database using: DROP USER username cascade; The issue is that the .dbf file still exists in the $ORACLE_HOME/dbs/oradata/ directory, which is ...
2
votes
0answers
1k views

Standby controlfile error

I am doing dataguard. I have manually done a backup for the standby database. It was working fine. Problem arose when I used the standby controlfile. On the primary, I have created a standby ...
4
votes
2answers
645 views

Isolation Level for a Data Warehouse

We are building out a data warehouse (and also some data marts as well) in our organization. My DBA skills have mostly been on OLTP type applications, but I am moving into supporting OLAP for our ...
6
votes
1answer
4k views

Moving postgresql data to different drive

I am using AWS as my cloud environment. I installed PostgreSQL on the same drive as my root instance volume. I have attached and mounted the second drive to my instance. Now I want to move all my ...
3
votes
1answer
5k views

How to connect multiple users/schemas in Oracle 11g?

I'm almost new user to databases, so I think I'm doing something wrong. I have the database created. I created 3 users, 1 it's an Admin, 2 are just users. I created 2 roles, 1 for the Admin and 2 ...
1
vote
1answer
334 views

mysql session logging tables

I've been building a session logging system for our sites. We get around ~15m hits a year and at the moment we're really only interested in stats about people who logon to our sites. Our table ...
1
vote
1answer
332 views

Upgrade production database during software development lifecycle

Background Using Oracle, there are a number of tools that help with migrating and applying development changes into the production environment (such as Embarcadero Change Manager). These tools can be ...
0
votes
2answers
89 views

what is the best choice from those two tables?

what is the best choice from those tables?? table A : keep DB simple with lower number of tables ... but i will find difficulties if i wanted to extract certain data from column of doses coz it's ...
1
vote
3answers
3k views

Instance Startup Modes & Shutdown Modes

So, I know that there are 3 modes of startup modes available for the instance which is NOMOUNT, MOUNT, and OPEN. What I want to know is in NOMOUNT mode it is stated that the instance started but still ...
2
votes
1answer
1k views

Recover database until cancel without prompt?

The statement: RECOVER DATABASE UNTIL CANCEL prompts once to select the archive log file. Is there a way to pre specify the value so as to be able to use it in a script without prompt? I have ...
1
vote
1answer
138 views

a question in tables relations

Table A is linked to Table B , and Table B is linked to Table C using primary and foreign keys My questions: Should i link Table A to Table C too?? Or Table B can act as intermediate link between ...
1
vote
1answer
88 views

Tables of a huge database

When I work on a huge database, and after following normalization rules, I found that I have many tables for each part of my huge database. That makes me worry about the final number of tables, it ...
0
votes
3answers
356 views

How do I enable READ-only (passive) mode in a particular RDBMS?

As most of you have noticed all StackExchange sites have been under maintenance/recovery a few days ago so they switched on READ-only mode. From their blog I know they used to use MS SQL Server 2008, ...
0
votes
2answers
1k views

Difference between chained and migrated rows

What is the difference between chained and migrated rows? Also what query should be used to display these rows? (I'm using Oracle 11gR2 database)
-1
votes
1answer
73 views

Can I make that connection?

If I have a column with data type varchar(max) in a table that contains a big piece of text, can I make a connection between a word or a sentence in that text with another word or a sentence in ...
0
votes
1answer
244 views

Patients profiles database

I am making software for patients in hospitals. I want to make an option that if a doctor has prescribed a drug that interacts with another drug that the patient already uses, a warning will appear ...
2
votes
3answers
14k views

Unable to start SQL Server Instance 2008 R2 - DB file corrupt

I was not able to start the SQL Server 2008 R2 production DB instance. After reading the log file error message is " The log scan number passed to log scan in database ‘master’ is not valid. This ...
1
vote
1answer
932 views

Data dictionary best practices in SQL Server 2008 r2 [closed]

We are interested in sharing the meta data and data dictionary among the team. I know that we can use the Extended Properties for this purpose, but based on my experience I've seen it gets out of date ...
0
votes
1answer
1k views

TSQL query for viewing start/end of all SQL Agent jobs yesterday

See this related query: What's a good tool for visualizing SQL Agent jobs? I'm not after a visual tool however, since I am looking to build my own visualisation. This is my starting point, but ...
2
votes
1answer
4k views

What is the best database design for multi-language data?

I am designing a multi-language database for a piece of software with the following features: data used in every country differs from other countries data used in every country will be in 2 ...
4
votes
1answer
103 views

How can I copy specific tables into one SQL Server Table into a separate table automatically?

I'm not sure if this is possible. Looking for some help with a specific issue. I am building an iPhone application with a data layer written in Ruby that will connect to SQL Server 2008. For various ...
1
vote
1answer
135 views

Regularly import tab-seperated log file to MySQL

I'm looking to keep arpwatch entries in a MySQL database to crossreference with other information I'm storing based on mac addresses. I've manually imported the arpwatch database into my mysql ...
4
votes
2answers
3k views

The best way to rename the tables after development completed

What is the easiest and most reliable approach to rename the database tables and columns in SQL Server 2008 r2? We have finished development and for some reasons, we are required to rename some ...
0
votes
1answer
121 views

How are transactions logs inserted?

I have an ms-access database at work that has a table that's a transaction log. The table contains the following fields: Date - The date the transaction took place. Table_Name - Name of the ...
2
votes
3answers
359 views

Merging tables with a 1 to 1 relationship in a database

Is it a good idea to merge two tables that have a 1..1 relationship together? I have inherited a database with too many tables linked together in a 1..1 relationship. I'd like to evaluate the ...
3
votes
3answers
176 views

What is a good guideline for sampling for statistics updates

Scope: A billion record table that is indexed in 10 ways. Rate of change per day is 1/2 a percent. Some of the indexes are monotonously increasing (datetime/timestamp), yet the common queries most ...
4
votes
1answer
2k views

When dedicated server process model should be used instead of shared process model?

It looks like Oracle shared server process model is better than dedicated server process model. In a shared server configuration, client user processes connect to a dispatcher and it can support ...
3
votes
2answers
6k views

Disabling Checking of Schema On Function/Stored Procedure Creation

I'm trying to automate the process that executes changes to the SQL Server 2008 R2 database. The process I put in place drops and recreates my stored procedures and functions, as well as run scripts ...
5
votes
1answer
875 views

Does dropping a Primary Key constraint from a Partitioned Table break the partition?

We have a table partitioned on a date column. The Primary Key for the table is a composite key of this date column and 4 other columns. We are thinking about dropping the Primary Key constraint from ...
0
votes
1answer
101 views

Is Index Used for This Query

If so, which one? How do we know? I have 3 indexes in a query. Actually only the first 2 should be useful { "v": NumberInt(1), "key": { "LongitudeLatitude": "2d", "Prominent"▼: ...
2
votes
1answer
2k views

How to schedule a weekly backup of a database only if it has been changed since last backup

I´m new to SQL Server administration. I´d like to create automatically backup database every Sunday night, but only if there was any change in previous week (if not, backup is unnecessary). Is there ...
7
votes
1answer
5k views

Is it possible to synchronize two ms access db?

We have a flower store where we use MS Access and a client program to work with the database. But this program can work only with one database. We are going to open a new store, so now we have to ...
0
votes
1answer
863 views

WorkAround for PHP PDO(with libpq V 9.1.4) binding for use of CITEXT?

The scenario Two systems(not server) running PHP and PostgreSQL with the following versions Fedora 15: PHP PHP 5.3.13 (cli) (built: May 9 2012 14:38:35) Copyright (c) 1997-2012 The ...
3
votes
2answers
7k views

Why database diagrams are not working when domain account is attached to database owner?

I was trying to use Database diagrams is SQL Server and got following error: Database diagram support objects cannot be installed because this database does not have a valid owner. To continue, first ...