Thread

1. PostgreSQL Objects design

   kunwar singh <krishsingh.111@gmail.com> — 2023-04-20T16:01:02Z

   Hi Listers,
   I want to learn more about Table/Columns/Indexes  design.
   
      - How big the columns should be?
      - How many number of columns should a table have at max?
      - How many rows a tables should have at max
      - What are size limitations of different data types
   
   
   Any books, blogs , videos, courses that you recommend I go over?
   
   I have been an Oracle DBA , but only from a support and tuning standpoint.
   I have never done this kind of work before, even in Oracle. So interested
   in learning in this area?
   
   Any approach that will speed up my learning?
   
   -- 
   Cheers,
   Kunwar
   

2. Re: PostgreSQL Objects design

   Steve Midgley <science@misuse.org> — 2023-04-20T16:25:01Z

   On Thu, Apr 20, 2023 at 9:01 AM kunwar singh <krishsingh.111@gmail.com>
   wrote:
   
   > Hi Listers,
   > I want to learn more about Table/Columns/Indexes  design.
   >
   >    - How big the columns should be?
   >    - How many number of columns should a table have at max?
   >    - How many rows a tables should have at max
   >    - What are size limitations of different data types
   >
   >
   > Any books, blogs , videos, courses that you recommend I go over?
   >
   > I have been an Oracle DBA , but only from a support and tuning standpoint.
   > I have never done this kind of work before, even in Oracle. So interested
   > in learning in this area?
   >
   > Any approach that will speed up my learning?
   >
   
   The Postgres docs, IMO, are astonishingly good.
   https://www.postgresql.org/docs/ -- Not what I tend to expect from open
   source projects, but there's a reason (again IMO) Postgres is the best
   database solution ever built. Regarding your specific question here are the
   current "hard" limits https://www.postgresql.org/docs/current/limits.html
   
   But recognize that the effective limits on your system are going to be
   lower, and based on your available ram, disk, and other resources.
   
   Stackoverflow might be a good place to understand more about these kinds of
   limits. I'll say that for my use cases, I've never had to worry about
   anything other than applying the right index or reworking my SQL statement
   to solve a particular problem in Postgres. So I'd say try to learn about
   various index techniques and how to use Postgres' SQL, as the starting
   place to learn. I think EnterpriseDB has good resources for those coming
   from Oracle as well..
   
   Welcome to the light side!
   Steve
   

3. PostgreSQL Objects design

   Wetmore, Matthew (CTR) <matthew.wetmore@express-scripts.com> — 2023-04-20T18:40:57Z

   Database Soup<http://www.databasesoup.com/>
   
   Also, create an account and sign up for postgres listservs.
   
   There are a couple to choose from.
   
   
   From: Steve Midgley <science@misuse.org>
   Sent: Thursday, April 20, 2023 11:25 AM
   To: kunwar singh <krishsingh.111@gmail.com>
   Cc: pgsql-sql@lists.postgresql.org
   Subject: [EXTERNAL] Re: PostgreSQL Objects design
   
   
   
   On Thu, Apr 20, 2023 at 9:01 AM kunwar singh <krishsingh.111@gmail.com<mailto:krishsingh.111@gmail.com>> wrote:
   Hi Listers,
   I want to learn more about Table/Columns/Indexes  design.
   
     *   How big the columns should be?
     *   How many number of columns should a table have at max?
     *   How many rows a tables should have at max
     *   What are size limitations of different data types
   
   Any books, blogs , videos, courses that you recommend I go over?
   
   I have been an Oracle DBA , but only from a support and tuning standpoint. I have never done this kind of work before, even in Oracle. So interested in learning in this area?
   
   Any approach that will speed up my learning?
   
   The Postgres docs, IMO, are astonishingly good. https://www.postgresql.org/docs/<https://urldefense.com/v3/__https:/www.postgresql.org/docs/__;!!GFE8dS6aclb0h1nkhPf9!6C4JVrsyOZcfy2BUIj0tJYagWA4O3LrZKTl_06I2nwdJHvpLpmMWj1eMcUB1rksL4m9H79u0Kj_lT_YicP2UlpJi_q0MRQ$> -- Not what I tend to expect from open source projects, but there's a reason (again IMO) Postgres is the best database solution ever built. Regarding your specific question here are the current "hard" limits https://www.postgresql.org/docs/current/limits.html<https://urldefense.com/v3/__https:/www.postgresql.org/docs/current/limits.html__;!!GFE8dS6aclb0h1nkhPf9!6C4JVrsyOZcfy2BUIj0tJYagWA4O3LrZKTl_06I2nwdJHvpLpmMWj1eMcUB1rksL4m9H79u0Kj_lT_YicP2UlpJ0XpDlbA$>
   
   But recognize that the effective limits on your system are going to be lower, and based on your available ram, disk, and other resources.
   
   Stackoverflow might be a good place to understand more about these kinds of limits. I'll say that for my use cases, I've never had to worry about anything other than applying the right index or reworking my SQL statement to solve a particular problem in Postgres. So I'd say try to learn about various index techniques and how to use Postgres' SQL, as the starting place to learn. I think EnterpriseDB has good resources for those coming from Oracle as well..
   
   Welcome to the light side!
   Steve