Q: Comparing PostgreSQL and Oracle

st 20. 5. 2020 v 9:34 odesílatel Alfonso <achavesco@gmail.com> napsal:

Hi colleagues.

I'm working in a Java application with some colleagues and we are in
doubt wether to use Oracle or PostgreSQL as the data store. It will be a
OLTP mainly application.

Beside of license terms/costs which is a clear point in favor of
PostgreSQL, could you please help me to get some more details regarding
what you can do in PostgreSQL and you can't in Oracle oand viceversa,
and what can be done using both but it is better done by PostgreSQL vs
Oracle and so on?

I mean, about functionalities, performance, support costs if any and
qualtity, etc.

this analyse can have more than thousand pages. Oracle and Postgres are two
different databases (in some parts - ACID implementation, planner, plan
cache, architecture it is very different).

Probably a distance between Oracle and Postgres is much less than Oracle
and MSSQL database, but that is all what can be reply on too general
question.

You can read some notes related to migration from Oracle to Postgres. More
it depends how deep are you SQL and database knowledges. For some low
levels (lot of developers has less than minimum knowledges about databases)
the the difference is very small. On high levels almost all is different
(in details). It is hard to say if some is better or worse, or is better to
do something on Postgres and better to do something on Oracle - because
these databases are different and has different sensitivity on patterns and
antipatterns.

Very different is maintenance of these databases. Postgres is simply
database with low necessity of maintenance (sure, that depends on
dimensions and risks). Oracle is much more complex difficult to learn
system. But for Oracle there is lot of commercial (not cheap tools) and
generally Oracle is better adapted in enterprise area (special hw, tools,
legislative).

So in detail - almost all are different, but both these databases are
relational SQL databases.

Regards

Pavel

Hi,

With massive development within OSS PosgreSQL over the years, there is plenty of things it can do when compared to Oracle. The below URLs give you a comprehensive comparison table, I am sure you or your colleagues may have already stumbled upon these URLs. In addition to that, there is something called "oracle compabilities" for PostgreSQL which makes it more like Oracle for most of the Oracle's native functionalities like packages and procedures etc.

https://db-engines.com/en/system/Oracle%3BPostgreSQL

https://db-engines.com/en/system/MySQL%3BOracle%3BPostgreSQL

-----Original Message-----
From: Alfonso <achavesco@gmail.com>
Sent: Wednesday, 20 May 2020 7:56 AM
To: pgsql-general@lists.postgresql.org
Subject: Q: Comparing PostgreSQL and Oracle

Hi colleagues.

I'm working in a Java application with some colleagues and we are in doubt wether to use Oracle or PostgreSQL as the data store. It will be a OLTP mainly application.

Beside of license terms/costs which is a clear point in favor of PostgreSQL, could you please help me to get some more details regarding what you can do in PostgreSQL and you can't in Oracle oand viceversa, and what can be done using both but it is better done by PostgreSQL vs Oracle and so on?

I mean, about functionalities, performance, support costs if any and qualtity, etc.

Many thanks.

Best Regards.

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For what it's worth, I used Oracle daily as a DBA and developer for my job
from 1983 until around 3 years ago when Postgres was chosen for a project I
was assigned to. I became pretty familiar with the workings of Oracle and
was somewhat skeptical when told we would be using Postgres, however it has
honestly been like a breath of fresh air. It has all the transactional
behaviour of a 'proper' RDBMS (even transactional DDL which as far as I'm
aware is still not supported in Oracle), and has all the features a
developer actually cares about. Postgres runs beautifully either locally on
a laptop, or in a Docker container using a tiny fraction of the resources
Oracle would need to do the same thing, so makes true local full-stack
development a delight. As someone familiar with both, I can honestly say go
with Postgres. You won't regret it.

Steve

On Wed, May 20, 2020 at 6:08 PM Ahmed, Nawaz (Fuji Xerox Australia) <
Nawaz.Ahmed@aus.fujixerox.com> wrote:

On Wed, May 20, 2020 at 12:34 AM Alfonso <achavesco@gmail.com> wrote:

Hi colleagues.

I'm working in a Java application with some colleagues and we are in
doubt wether to use Oracle or PostgreSQL as the data store. It will be a
OLTP mainly application.

Beside of license terms/costs which is a clear point in favor of
PostgreSQL, could you please help me to get some more details regarding
what you can do in PostgreSQL and you can't in Oracle oand viceversa,
and what can be done using both but it is better done by PostgreSQL vs
Oracle and so on?

I mean, about functionalities, performance, support costs if any and
qualtity, etc.

Many thanks.

Best Regards.

Perhaps it is better to do the inverse: Think about what do you need to

do. DB Size (in hundred of Gb). How heavy will be the use of the database.
Concurrent users. The peak number of users. How many batch operations. Size
of those batch operations. etc

And based on that compare what functionality Oracle and Postgres offer to
you.

Pablo