I would like to transfer data from postgres RDS database tables to a new reporting database, also created as a postgres RDS. I create data catalogs and created a script that should join two tables together and then save data to a reporting database. It is working as intended only when run for the first time - it saves current data to new database. I need to update the reporting database daily with newly added records to a basic database, but it is not saving new data for me. Is there any way to insert only new data into a db with AWS Glue?
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I've migrated a On premise Oracle to Aurora Postgres on AWS RDS. my migration process is described in the below image.
I'm looking for an option to sync data from on prem oracle to aurora postgres (Something like, if one row inserted/updated in particular table, that data should come and update/insert in aurora postgres table).
Is it possible ?
Yes you'll want to use the DMS (Database Migration Service) which can do continuous data replication from source to target DB's
https://aws.amazon.com/dms/
I created an RDS Postgres instance. I'm new to RDS.
db host:
demodb.xxxuxxvxxxxx.us-east-2.rds.amazonaws.com
db identifier:
demodb
Every tutorial says to connect with this URL:
jdbc:postgresql://demodb.xxxuxxvxxxxx.us-east-2.rds.amazonaws.com:5432/demodb
but every time I do I get this error-
FATAl: database "demodb" does not exist.
I am able to connect using this:
jdbc:postgresql://demodb.xxxuxxvxxxxx.us-east-2.rds.amazonaws.com:5432/postgres
Now, while I was excited to connect after I used SQL workbench to create tables and insert data into those tables, a few hours later all my tables and data were deleted/wiped/dropped. Why would this happen? and How can I prevent it from happening in the future?
FATAl: database "demodb" does not exist.
demodb is db instance identifier. It is NOT the name of your database inside of PostgreSQL.
By default RDS PostgreSQL does not create a database for you. It seems to me that you haven't created an actual database when you setup your RDS PostgreSQL.
To create a database at RDS creation there is an option called Initial database name where you should specify the name of the database you want. Otherwise, no database is created, which is a default behavior:
Every time I create a new database it's creating a table in that database. I'm finding information about model databases for Microsoft SQL Server, but I can't find anything for Postgres.
You probably created that table in the template1 database.
When you create a database, Postgres doesn't really create it from scratch, it copies an existing one.
Quote from the manual
By default, the new database will be created by cloning the standard system database template1. A different template can be specified by writing TEMPLATE name.
Just connect to the template1 database and drop the table there.
Using pg_dump I created a backup database and restored it into a new database. The problem is some columns doesn't have the values displayed. Can I use pg_dump with a where clause to populate the new database with the missing values from the back-up database if the id from the back-up database is find in the new database?
I need to update a dababase from an other database... For this I need to search in existing database if the records exists, if not add... One of the database is locally stored in my computer, and the other one is on heroku... But I don't know how to access heroku database from my computer to create the inserts and to query if I have to insert or not...
Any idea how can I do something like this?
You can connect via any DB tool, e.g. Oracle SQL Developer with Postgres JDBC connector, to a Heroku Postgres DB. The parameters are listed in the GUI of postgres.heroku.com for your instance.