Import data from JSON to PostgreSQL via command line on Linux

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Want to import data from JSON Lines (JSONL) to PostgreSQL via Command Line Interface (CLI) on Linux (Ubuntu/RedHat/CentOS…)?

Using pg-cmd, a Command Line Interface (CLI) client for PostgreSQL, you can import data from JSON Lines to PostgreSQL easily and fast. Direct Interaction or Scripting and Automation.

  • No need to install PostgreSQL client library.
  • Convenient to deploy to cloud. No need to run installation file, just uncompress and run, immediately.
  • Commands are entered into a terminal or command prompt, accessed from local or remote (like SSH).
  • Support Windows, Linux, and MacOS.

Download pg-cmd Linux version Download pg-cmd

JSON Lines text format, also called newline-delimited JSON (NDJSON), or Line-delimited JSON (LDJSON). JSON Lines files may be saved with the file extension .jsonl, *.ndjson, *.ldjson.

Import data from JSON Lines to PostgreSQL via command line on Linux (Ubuntu/RedHat/CentOS…)

1. In interactive mode:

pg-cmd> load table=media_messages 
      > datafile=f:\media_messages.json 
      > filetype=json;

2. In batch mode:

pg-cmd dsn="pan:withdata@192.168.0.102:3306/test" task=load table=media_messages datafile=f:\media_messages.json filetype=json quit=y

“loadtype=replace” will delete all data in table before inserting.

See parameters detail.

More about pg-cmd – Command Line Interface (CLI) tool for PostgreSQL