The postgres tag has no wiki summary.
6
votes
5answers
210 views
Storing a re-orderable list in a database
I'm working on a wishlist system, where users can add items to their various wishlists, and I plan to allow users to re-order the items later on. I am not really sure about the best way to go about ...
6
votes
2answers
664 views
Making the switch from MySQL to PostgreSQL?
I've spent the last year becoming really comfortable with MySQL, but due to its increasing trendiness and my desire to homogenize my web-apps with Heroku, I'd like to start using PostgreSQL for my web ...
5
votes
6answers
1k views
Is there any reason to use varchar over text columns in a database?
Is varchar just a remnant from before text came around, or are there use cases where you would want to use a varchar? (Or char for that matter..)
(I use Postgres and MySQL (MyISAM) daily, so those ...
5
votes
2answers
92 views
How to handle manipulation of data after a db record is written from outside my program
I have written a warehouse management web app. The application handles batch picking, warehouse routing, packing, and the final piece is handled by UPS worldship to "ship" the packages. Worldship will ...
5
votes
3answers
295 views
What reading is recommended for an experienced Java/SQL Developer moving to Apache/Tomcat, Postgres, Hibernate
I am taking over management and development of a website developed in Java using Hibernate and Postgres, running on Apache/Tomcat. I am an experienced Java developer, and have experience in Ruby on ...
3
votes
9answers
3k views
Is there a large bank using Mysql or PostgreSQL? [closed]
I always thought the largest scale of banks use Oracle. However, there is no proof they really use Oracle instead of Mysql or PostgreSQL, nobody knows the secret.
Any idea what they really use? Can ...
2
votes
1answer
178 views
Established coding standards for pl/pgsql code
I need to standardize coding practices for project that compromises, among others, of pl/pgsql database, that has some amount of nontrivial code.
I look for:
Code formatting guidelines, ...
1
vote
3answers
143 views
Logging to database: Log first or action first?
Long story short, I'm working on a web-based frontend that interacts with a database, and one of the functions is that every action on a particular table gets logged to keep a full history of all ...
0
votes
1answer
366 views
How to check for null in most sql's - “column is null” or “column = null” [closed]
I'm not sure of the right syntax to use.
Is it
select * from tlb
where flag is NULL
or
select * from tlb
where flag = NULL
Is the answer the same for oracle, sqlserver and Postgres?
0
votes
3answers
128 views
Optimal Database design regarding functionality of letting user share posts by other users
I want to implement functionality which let user share posts by other users similar to what Facebook and Google+ share button and twitter retweet.
There are 2 choices:
1) I create duplicate copy of ...
0
votes
1answer
47 views
What are some database designs that support lineage tracing?
Environment
PostgreSQL 9.1
Java
Problem
I'll try to illustrate the problem here as simply as possible:
I'm trying to record the following relationship:
Node 1 => Node 2 => Node 3
Where Node 1 ...
0
votes
1answer
156 views
Breaking 1NF to model subset constraints. Does this sound sane?
My first question here. Appologize if it is in the wrong forum but this seems pretty conceptual. I am looking at doing something that goes against conventional wisdom and want to get some feedback ...
0
votes
1answer
105 views
How to use database adapters' cursors safely?
I started to use psycopg2 to connect my little python script to a PostgreSQL database few days ago. After some research I found that a lot of database connector, like psycopg, work using cursors.
I ...
0
votes
1answer
229 views
What schema documentation tools exist for PostgreSQL [closed]
MySQL has MySQL Workbench for designing and documenting your schema, and generates CREATE and ALTER scripts based on your design. We're looking at migrating to PostgreSQL in the near future, and we ...
-1
votes
1answer
70 views
Verify uniqueness of new content
I'm working on a review site, where there is a minor issue with almost duplicate reviews across items. Just a few words are changed. It would be very nice to be able to uncover these duplicates before ...
