Data Structure & Algorithm Classes (Live).Copy & Paste is the most convenient way to import and export data in Postico.Data Structure & Algorithm-Self Paced(C++/JAVA).Java Programming - Beginner to Advanced.Full Stack Development with React & Node JS(Live).Android App Development with Kotlin(Live).Python Backend Development with Django(Live).DevOps Engineering - Planning to Production.GATE CS Original Papers and Official Keys.ISRO CS Original Papers and Official Keys.ISRO CS Syllabus for Scientist/Engineer Exam.PostgreSQL – Insert Data Into a Table using Python.PostgreSQL – Import CSV File Into Table.PostgreSQL – Create Auto-increment Column using SERIAL.PostgreSQL - Function Returning A Table.PostgreSQL copy database from a server to another: The connection between servers grows slower as the database gets larger.Automated Postgresql Backups with NodeJS and Bash There are many ways to copy a database between various PostgreSQL database servers. The database is the holy grail of your application, but, given the unpredictable nature of software, you should always be prepared for the possibility of media, hardware and software failures. If any of these failures occurs, the main objective should be to ensure the database is back up and running as fast as possible while minimizing user disruption and simultaneously ensuring there is no data loss. The best way to achieve this is to have a detailed backup-and-restore procedure documented in case anything goes wrong with the production database. Sprinkle a bit of automation so the process takes care of itself and you will have saved yourself from some frustrating future headaches. It’s entirely possible to accomplish this with bash alone, but bash scripting can get complicated and boring pretty fast – the syntax is unintuitive and it’s not the most beginner-friendly language out there, especially for people more used to modern languages like Node. Our philosophy is to reserve those bash muscles for when we really need them. Postgres ships with two handy utilities that help us easily backup and restore our databases – pg_dump and pg_restore. Pg_dump is an in-built way of making consistent database backups backups (also referred to as ‘dumps’) in a number of different formats and across different platforms. It also provides a schema-only feature for people looking to preserve their database schemas and not the data. If you need to restore and sort the data, Postgres provides the pg_restore utility. Internally, it uses sql commands such as DROP DATABASE and CREATE DATABASE bypassing normal restrictions present when using commands such as dropdb. In order to use pg_restore, however, your database output format should not be a plain text file. Of note should be the fact that pg_dump and pg_restore were created to be as platform-agnostic as possible. You’ll probably need to do a bit of work if you want to transfer a Postgres database backup to a new OracleDB database, but backing up and restoring on any SQL platform should work just as well. c – drop any existing database objects before restoring them.In order to backup a database, we run the following command: If the tables in the backup database already exist in your actual database, they will be deleted before being re-added. C – create the database before restoring into it.Note: using this option might result in a lot of ‘errors.’ These can be safely ignored, as stated at the end of the output. When this option is used together with -c like above, the database is dropped and recreated. Pg_restore runs SQL statements internally and isn’t limited by any connected clients. Destructive commands like dropdb warn you when there are any connected clients, pg_restore won’t. Our weapon of choice for running bash commands is The library goes into a lot of effort to abstract away pitfalls that come with bash, like having to learn ‘awk’ for simple string manipulation and the aforementioned cumbersome syntax. Besides, it has some interesting perks, like being able to switch context between Javascript and bash quite easily. In addition, we also need to install dotenv in order to take advantage of environment variables.
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