Best practices are generally and informally recognized as the methods and processes that have been shown over time to be superior to those achieved by other means.

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2
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1answer
979 views

Data archival strategy that handles schema changes?

I am working with a legacy application that has about ten years of customer data. A majority of this data is not used in day-to-day operations but there is a business requirement to have the data ...
1
vote
3answers
124 views

Storing summed values

I'm trying to create a database to store values for Profit & Loss statements and I'm wondering what the best way to structure this would be. Specifically, amounts that are are equated from other ...
3
votes
1answer
820 views

Robust Mysql failover using free tools [closed]

I am looking for a free solution to set up Mysql in an active/passive configuration, in order to provide high-availability. In particular, a Bugzilla installation, and MediaWiki needs to stay alive ...
1
vote
2answers
269 views

For a boolean settings table, should I toggle a flag, or insert/delete?

I have a settings table. SETTINGS -------- settingId int settingName varchar(20) Each user can choose to apply the settings, or not. The interface allows them to quickly toggle the settings on ...
3
votes
2answers
245 views

Store categories in database or use hard coded integers?

An address can belong to either the mailing or billing categories. When a user adds an address to a table, should the address category be an independent integer value set by a constant somewhere in ...
4
votes
1answer
1k views

Modelling Relationships in an E-R Diagram, Table or Foreign Key?

Should a relationship in an E-R diagram be created in the database as a table or a foreign key? For example: a tutor lectures a class I see it as three possibilities: there is a "lectures" ...
1
vote
2answers
949 views

Database design experienced view

I want to make a database that stores countries, their respective states, and cities. I am confused how to normalize these. Can anyone help? My ideas: Table 1 Countries (id pk, name , code) ...
3
votes
2answers
371 views

Database modelling best practice question

I am modelling a database for an application I am developing and I am in front of a choice for which I would like to know what the best practice is. Let's say I have a Documents table and a Users ...
4
votes
4answers
5k views

Over use of Oracle With Clause?

I'm writing many reporting queries for my current employer utilizing Oracle's With clause to allow myself to create simple steps, each of which is a data oriented transformation, that build upon each ...
2
votes
3answers
323 views

designing multiple tables while eliminating duplication?

As I'm working on an educational website, I'm facing a problem with my database design scheme - I can't find the correct design that eliminates duplication in the tables I'm creating. What I'm trying ...
2
votes
0answers
109 views

Are there any best practices before moving SQL Server to another node (controlled failover)?

Let's say there are multiple jobs running on the SQL Server - we have index maintenance jobs, backups, replication, etc. We would like to perform a switchover using Failover Cluster Manager. Are there ...
24
votes
4answers
8k views

Unit testing of stored procedures

I've been considering this for quite a long time now. The basic question is: how to unit test stored procedures? I see that I can set up unit tests relatively easily for functions in the classic ...
3
votes
2answers
5k views

changing float->numeric casts from assignment to implicit, dangerous?

In porting an application to PostgreSQL (9.1), one odd SQL incompatibility I've discovered concerns the round() function, specifically the version that takes a second argument indicating the rounding ...
1
vote
1answer
298 views

Should indexes automatically be placed into their own bufferpool?

We work with DB2 LUW (specifically we are currently on 9.7 FP4) running on AIX. Per best practices from IBM, they recommend that when you build a table, you place the data, the indexes, and LOBs/LONG ...
3
votes
1answer
639 views

What is the best practice for physical deployment of data marts?

We are just starting to get into business intelligence at our company. We have some architects who are designing our data warehouse and also our data marts. They are using star schema for both ...
7
votes
2answers
875 views

Is it safe to run antivirus software on my database servers?

Some implementations of antivirus software are known to Microsoft to cause a variety of problems for SQL Server, and Microsoft has a support article dedicated just to picking the right antivirus ...
2
votes
2answers
305 views

Attacks on Postgresql listening for requests on 'localhost'

I am using jboss server for my servlets and the postgresql as the database server, listening on port 5432 on localhost. My jboss server is bound to a public IP. I want to know that since my postgesql ...
6
votes
1answer
1k views

What should every DBA know? [closed]

As a SysAdmin who "wears all the hats", I find myself increasingly pulled into database projects. I took one database course back in college and since then I've always scoured resources online (like ...
1
vote
1answer
78 views

Configuration Persistance Design

We have a well designed and normalized DB, but, there is a requisit that could cloud this design. This image shows the design of part of the DB. The main functionality of our application is to create ...
2
votes
1answer
614 views

Any problem with same conversation handle used by multiple services communicating with one target queue in a multiplexed service broker order queue?

I asked a question about implementing conversation groups in a SQL Service Broker setup which has several User Services communicating with the Server Service (Processing xml data requests to be sent ...
2
votes
0answers
337 views

going from heirarchical XML to heirarchical SQL tables then SQL to c# objects to go to user view, how should I store the data in the databases?

Hi I'm getting my data from a web service using their getData call and it comes in as fairly chunky heirarchical XML, first everything all at once, like <allData> <product1> ...
7
votes
3answers
193 views

How to handle reporting of an extreme amount of databases in SQL Server 2005?

I'm looking for some advice on how to handle reporting for our environment. We currently have 16 servers with 20 instances of SQL Server 2005. We have over 6,600 databases and growing across these ...
2
votes
1answer
673 views

How would you implement conversation groups/ locking for multiple users of a Service Broker Queue?

How do you implement conversation groups for multiple users using their own instance of the user applications but sending related messages to the service broker queue? Any good example of this kind ...
6
votes
2answers
1k views

Stored Procedures Best Practices: Fenced or Unfenced?

I believe I understand the reasons behind fenced and unfenced stored procedures. Fenced run "outside" of the database (in our case DB2) so as to prevent possible corruption of the database engine ...
0
votes
1answer
490 views

Should I use mysql_upgrade after mysqld_safe when upgrading MariaDB?

I'm wanting to know the best practice to do a MariaDB upgrade on opensuse. I am getting this error: mysqldump: Couldn't execute 'SHOW FUNCTION STATUS WHERE Db = 'a_database'': Cannot load from ...
1
vote
0answers
214 views

Enforce a hard limit on write execution time during Amazon RDS write stalls

I am trying to recover from the situation where Amazon RDS write operations stall (some discussion on why this is here). If I show full processlist, I will see something like this: 318263 myapp1 ...
3
votes
2answers
20k views

Using Same CASE WHEN Conditions For Multiple Query Columns

Is there a "better" way to rewrite a SELECT clause where multiple columns use the same CASE WHEN conditions so that the conditions are only checked once? See the example below. SELECT CASE ...
4
votes
1answer
100 views

What are the pitfalls when storing data retrieved from an api

I can get some financial data from our vendor via their API. In this case API is too strong a word. Basically we can get only an array of orders for a given time range. What we paid them for the ...
2
votes
1answer
779 views

How to design database for tree view with an infinite depth

I am trying to combine C# and SQL2005 for an application which need to have tree view control. One of user requests is to that tree view can user friendly grow into infinite dept of child nodes. That ...
3
votes
2answers
2k views

Looking for example design of using an SQL database as a queue for throttling web service requests of multiple users

I'm designing a system for multiple users to queue their requests to a web service which takes requests such as creating new entries, changing entries, requesting data. Many of the web service calls ...
3
votes
1answer
231 views

Optimizing queries against a set of tables that contain partitioned data

I have a third party program that creates and populates a series of tables to hold some historical data: data_33 -- contains data for 12/01/11 - 12/05/11 data_34 -- contains data for 12/05/11 - ...
1
vote
1answer
3k views

Best practices for ensuring up to date sequences after table import

We perform weekly table moves between several schema using expdp and impdp. Some tables have sequences associated with the ID columns and I'd like to ensure that the sequences are always up to date on ...
1
vote
1answer
407 views

Normalization: Should common columns of two tables be pulled out into a third table?

Should I further normalize my current design to eliminate redundancies? I have the following tables: empl: standard user table empl_cat: employee "category" empl_admin_cat: administrative ...
2
votes
3answers
415 views

What are the design alternatives when having multiple “type” tables

I am working on a database design and see myself with lots of *_type tables (e.g. user_type, product_type, etc.) where the structure of these tables is the same, basically: user_type ( id int pk ...
0
votes
1answer
148 views

Best practices in securing Oracle Standard edition one [closed]

I have a database server with Oracle Standard Edition One. I'm interested what are the best practices to secure Oracle? I have Java web application installed in the same server. The Java application ...
8
votes
1answer
792 views

Why does the fill factor in SQL Server default to 0 (100%)?

I understand fill-factor, pages and index structure and I therefor understand why a 100% fill factor is a rare best practice. So why does it default to 0 (or 100% ) by default? Why not 90 or 95? Is ...
5
votes
3answers
4k views

“Table of Constants” - is this common practice?

College SQL class, using the book "SQL Fundamentals" by John J. Patrick. In the third chapter, he talks about using a "table of constants" to add columns to a select statement, where all rows have the ...
2
votes
1answer
626 views

Replicate SQL Data Inside Firewall to Outside Firewall - Suggestions

Currently I have an internal CRM application that houses all my data and runs my entire company. The front end is ASP, and the back end is SQL. The external site will run SQL What I'd like to do ...
17
votes
4answers
4k views

Where should you define foreign keys?

Is it better to define foreign keys in the database or in the code part of an application?
4
votes
2answers
508 views

Huge database logging of event type rows and ways to optimize it

We have a database that stores events. Events are generated at a 1000 per sec rate. We need to keep these events accessible for some years. Usual use of these events is selecting some of them from the ...
6
votes
3answers
414 views

Best practices for change management with indexes

Our IT shop is first starting to build a group of DBA's. All of us (myself included) have come over from the application development/architecture world, so the DBA world is still fairly new to us. ...
2
votes
1answer
953 views

tempdb on raid1 isolated or raid10 shared with high write db

PROPOSAL 2 8x600gb raid 10 mdf array 4x600gb raid 10 ldf array PROPOSAL 3 8x600gb raid 10 mdf array 2x600gb raid 1 ldf array 2x600gb raid 1 tempdb mdf/ldf array READ/WRITE STATS ON ...
3
votes
1answer
2k views

minimum privileges required for a user

I am configuring a 10g Express database on Windows 2003 that will be the back end for a public web server. There are many other things to do to harden the database but a good place to start is user ...
-3
votes
1answer
1k views

Best practices for finding and updating a handful of records?

Seems like a simple question, but wondering what is the "best" way to do this if you were "dotting your i's and crossing your t's".
7
votes
1answer
1k views

How to setup local database development process for small web team?

Background I am working on creating a new development process for a small web team of about 4 programmers and 4 designers, with the obvious potential to grow the team in the future. Our product is a ...
2
votes
2answers
382 views

How to quantify TEMPDB usage in relation to other databases hosted on same hardware?

Working on a project to decide if configuration 1 or 2 is the best way to organise disks for my SAN: Config1 (sql 2008): 8 disks @ raid 10 data 2 disks @ raid 1 logs 2 disks @ raid 1 tempdb 2 disks ...
5
votes
1answer
1k views

What is the optimal way to design an approval queue and audit trail for entities in SQL Server 2008 R2?

Simplified Explanation: I have three main tables: customer, phone, and customer_phone to resolve the many-to-many. I need to ensure that only admins can insert/update these tables without approval. ...
10
votes
6answers
7k views

Splitting Tables in MySQL. Good practice?

I have started working on an existing project and the previous developer had split up a table into 10 separate tables with identical schemas but different data. The tables look like this: ...
1
vote
2answers
18k views

How to join two table and show one query result in MySQL?

I have a table1 (records 3), and table2 (records 3). Where i have field name in both. Now i want to make a result from those two table, which will show me both table records and take only one if there ...
20
votes
1answer
6k views

Best practices for schema changes and data migrations to a live database without downtime?

How do you make schema changes to a live database without downtime? For instance, lets say I have a PostgreSQL database with a table including various user data like email addresses etc, all ...