Want to import multiple CSV files into a single PostgreSQL table?
Try Withdata FileToDB, a desktop CSV to PostgreSQL converter for Windows, MacOS, and Linux, Convert CSV to PostgreSQL, Easy and Fast.
- Can run in GUI mode, Step by Step, just a few mouse clicks.
- Can run in Command line, for Scheduled Tasks and Streams.
- Convert locally and privately, avoid uploading large or private CSV files to online services.
- Support Windows, Linux, and macOS.
Import multiple CSV files into a single PostgreSQL table
Login to PostgreSQL -> Choose CSV files -> Set PostgreSQL table -> Import CSV files to PostgreSQL table
Choose PostgreSQL and logon.
Click “Wizard – N Files To 1 Table” at task dialog.
Select the “CSV” file type.
then show the wizard.
1. Select a folder that constains CSV files.
Support large ( > 4GB ) CSV files.
2. Config first CSV file importing options.
3. Select a PostgreSQL table and config fields.
4. Preview data will be in PostgreSQL table.
5. Import multiple CSV files to the PostgreSQL table.
View imported data in PostgreSQL table
Import multiple CSV files to PostgreSQL in command line
Save “multiple CSV files to PostgreSQL” session, then you can:
- Import multiple CSV files to PostgreSQL in Windows command line.
- Import multiple CSV files to PostgreSQL in Linux command line.
- Import multiple CSV files to PostgreSQL in macOS command line.
Set scheduled tasks for importing multiple CSV files to PostgreSQL
You can schedule and automate this converting task by:
- Save session and create .bat (Windows) or .sh (Linux/macOS) file for “CSV to PostgreSQL” conversion.
- Set scheduled task for “CSV to PostgreSQL” conversion.
FAQ
More about Withdata FileToDB – CSV to PostgreSQL converter
Download Withdata FileToDB
See Video: Batch import data from multiple CSV files into a single PostgreSQL table in a few clicks
See also:
CSV → PostgreSQL reference
Type mapping
| Value kind | in CSV | in PostgreSQL |
|---|---|---|
| Int | 1234 | integer |
| Bigint | 9007199254740993 | bigint |
| Decimal | 1234.56 | numeric(p,s) |
| Float | 1.234e+10 | double precision |
| Text | quoted only when it contains a comma or a quote | varchar(n) |
| Long text | must be quoted; line breaks inside force multi-line records | text |
| Date | 2026-09-18 | date |
| Datetime | 2026-09-18 14:30:00 | timestamp |
| Binary | not representable - base64 or hex string | bytea |
| Boolean | TRUE / FALSE, or 1 / 0 depending on the writer | boolean |
| JSON | the whole JSON value quoted, with internal quotes doubled | jsonb |
Dialect differences
CSV is a file format and PostgreSQL is a database server, so the target has to be told the types the file never carried - the rows below are where the two sides diverge.
| Property | in CSV | in PostgreSQL |
|---|---|---|
| port | — | 5432 |
| identifiers | Double quotes; a literal quote is doubled ("" ) | "double quotes" |
| row limit | — | LIMIT n |
| dates | Conventional text: 2026-09-18 or 2026-09-18 14:30:00 | timestamp, timestamptz, date, time |
| long text | — | TEXT |
| binary | Not supported | BYTEA |
| separator | Comma "," | — |
| encoding | No declaration - UTF-8 works only with a BOM | — |
| typing | None - every field is text | — |
| shape | Flat table, optional header row | Tables of rows and columns |
| ceiling | No formal limit; row count bounded by memory | — |
Command line
| Side | Command |
|---|---|
| PostgreSQL | pg_dump or COPY ... TO |
| PostgreSQL (load) | COPY ... FROM |
Convert your data online, free
Free in-browser converters for CSV, Excel, JSON, XML and SQL: Withdata Online Data Conversion. Large files, batch conversion or scheduling? See the offline desktop apps, or browse all data conversion tools.
