Want to upsert data from JSON file to PostgreSQL ?
Upsert: inserts rows into a table if they do not already exist, or updates them if they do.
Using File To DB, a native GUI tool for Windows, MacOS, and Linux, you can upsert data from JSON file to PostgreSQL easily and fast, no need to program, just a few mouse clicks!
Download FileToDB 
Windows 64 bit
Windows 32 bit
Linux .deb (For Debian, Ubuntu) 64 bit
Linux .rpm (For Red Hat, Fedora, SUSE) 64 bit
MacOS 64 bit
Upsert data from JSON file to PostgreSQL
Choose PostgreSQL and logon.
Click “Wizard – 1 File To 1 Table” at task dialog.
Select the “JSON” file type.
then show the wizard.
1. Open a JSON file.
2. Select a table and config fields.
Set “Load Type” to “Upsert”, choice “By Key”.
3. Preview data.
4. Upsert JSON data to PostgreSQL .
You can schedule and automate this converting task by:
1) Save session and create .bat file.