Want to sync data from DB2 to PostgreSQL ?
Try Withdata DBCopier, a DB2 to PostgreSQL converter for Windows, Mac, and Linux, Synchronize DB2 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.
- Support Windows, Linux, and macOS.
Synchronize data from DB2 to PostgreSQL
Login to DB2 and target PostgreSQL -> Select source DB2 tables -> Set target PostgreSQL tables -> Sync DB2 data to PostgreSQL
Choose source DB2 database and logon.

Choose target PostgreSQL database and logon.

Click “Wizard – Import All Tables” at task dialog.

then show the wizard.
1. Select source DB2 tables to sync.

2. List target PostgreSQL tables.
Set “Import Type” to “Replace”, it will do a full synchronization.

Or set “Import Type” to “Upsert”, it will do a upsert synchronization.

3. Select PostgreSQL tables to sync.

4. Sync DB2 data to PostgreSQL.

More about DB2 to PostgreSQL converter
See also:
DB2 → PostgreSQL reference
Type mapping
| Value kind | in DB2 | in PostgreSQL |
|---|---|---|
| Int | INTEGER | integer |
| Bigint | BIGINT | bigint |
| Decimal | DECIMAL(p,s) | numeric(p,s) |
| Float | DOUBLE | double precision |
| Text | VARCHAR(n) | varchar(n) |
| Long text | CLOB | text |
| Date | DATE | date |
| Datetime | TIMESTAMP | timestamp |
| Binary | BLOB | bytea |
| Boolean | SMALLINT | boolean |
| JSON | CLOB | jsonb |
Dialect differences
Both DB2 and PostgreSQL are database servers, so the differences below are dialect-level: the same concept is spelled differently on each side.
| Property | in DB2 | in PostgreSQL |
|---|---|---|
| port | 50000 | 5432 |
| row limit | FETCH FIRST n ROWS | LIMIT n |
| dates | DATE, TIME, TIMESTAMP | timestamp, timestamptz, date, time |
| long text | CLOB | TEXT |
| binary | BLOB | BYTEA |
Command line
| Side | Command |
|---|---|
| DB2 | EXPORT TO out.csv OF DEL |
| PostgreSQL | pg_dump or COPY ... TO |
| PostgreSQL (load) | COPY ... FROM |
| DB2 (load) | db2 IMPORT FROM file OF DEL |
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