0
votes
2answers
87 views

Auto increment char varying column prefixed with some characters

I have a table in PostgreSQL for hospital patients and I want to make a primary key for it as PAT0000001 (char varying) and to keep that field as auto-increment as well. Is there a way to achieve ...
1
vote
1answer
95 views

Import using pgAdmin3 produces ERROR: duplicate key value violates unique constraint

I am importing from the GUI a CSV file into a table. I have created the following table: CREATE TABLE jira_tickets.daqa_rpt_tbl ( daqa_report_id bigint NOT NULL DEFAULT ...
3
votes
1answer
3k views

Fixing table structure to avoid `Error: duplicate key value violates unique constraint`

I have a table which is created this way: -- -- Table: #__content -- CREATE TABLE "jos_content" ( "id" serial NOT NULL, "asset_id" bigint DEFAULT 0 NOT NULL, ... "xreference" varchar(50) ...
3
votes
2answers
2k views

Auto-increment key and Foreign Key as composite for relational database

I do not have any experience in databases other than what I have from just playing with workbench and trying to understand how I need to setup this database for a project. I have been searching the ...
2
votes
1answer
449 views

Design problem with auto-increment fields

I've made this design similar to my problem, it's not exact but it close enough to understand my problem: http://i42.tinypic.com/bhbp5.jpg Some cellular client frequently send their GPS position and ...
5
votes
2answers
1k views

What Is The Point of a Primary Key?

Why do I need to have a primary key on my database for it to function correctly? In every tutorial I read, you need to make the id key the primary key. What does the primary key do differently than ...
1
vote
2answers
500 views

serial field issue

Q: I use a serial as a datatype for my primary keys in my tables. I insert a lot of data then truncate these data one after one many times to test the data entry. My question is: Is there any ...