STARTER — $7.99/MO / 14-DAY PRO TRIAL ON SIGNUP
Print labels on the Zebra ZD621 from a SQL database
Print labels on the Zebra ZD621 from a SQL database. ZPL II at 203 DPI, 104 mm wide, with column-to-field binding straight from your rows.
HOW IT WORKS
Three screens from data to printed label.
No copy-paste, no hunting for templates. The same flow repeats for every record.
Choose the engine, test the connection and browse the schema.
A named, parameterised query returns the rows a label needs.
Preview, pick the printer and print the result.
01
Who this is for
Teams that already own a Zebra ZD621 and keep the data they label in Database.
02
Step by step
- Install the LabelInn Windows app and your Microsoft SQL Server client driver on the machine that will run the job.
- Add the Microsoft SQL Server connection: host, port 1433, database and a database user that can read the tables you need.
- Write the Microsoft T-SQL query that returns exactly the rows you want to label, one row per label.
- Map each result column onto a label field — text, barcode, QR or RFID — then preview a few rows.
- Print the result set, or save the query so the next run is one click.
03
Other data sources
- Microsoft SQL Server — 1433 · Microsoft T-SQL
- MySQL / MariaDB — 3306 · MySQL
- PostgreSQL — 5432 · PostgreSQL
- Oracle — 1521 · Oracle SQL
- SAP HANA — 30015 · SAP HANA SQL
Try it with your own data — signing up starts a 14-day Pro trial, no credit card. After that this feature needs Starter at $7.99/mo. Download now → | See pricing →
04
Practical notes for this pairing
- At 203 DPI a single printer dot is about 0.125 mm. Size barcodes in whole dots so the narrow bar lands on an exact dot boundary and stays scannable.
- The ZD621 prints up to 104 mm wide. Check the widest value your Database data can produce against that width before running a full batch.
- Connections available on this model: USB, Ethernet, Wi-Fi (variant-dependent), Bluetooth (variant-dependent). Pick the one the machine running the job can actually reach.
- LabelInn sends ZPL II straight to the ZD621, so the label your data fills is rendered by the printer itself rather than by an operating-system driver.
05
Printer facts
| Command language | ZPL II (native), EPL2 (native) |
|---|---|
| Resolution | 203 DPI / 300 DPI |
| Print width | 104 mm |
| Connections | USB, Ethernet, Wi-Fi (variant-dependent), Bluetooth (variant-dependent) |
| Driver | No |
06
Requirements for a direct database connection
- Direct database connections need the LabelInn Windows desktop app — the connector that loads real database drivers is a Windows sidecar, so this path is not available on macOS today.
- You supply the Microsoft SQL Server client driver; LabelInn does not redistribute database drivers.
- Point the connection at a read-only database user. LabelInn reads rows to fill labels — it should never need write access.
- While you are testing, keep the query small with `SELECT TOP n …` so a preview cannot pull an entire table.
07
Frequently asked questions
ANY PRINTER
Design it, bind your data, print on the printer you already own.
Zebra, TSC, Toshiba, Epson and more — over USB, network or Bluetooth, with no driver to install.
PRICING
Start free. Pay when it earns its keep.
QUESTIONS / FAQ
Frequently asked questions
Can the Zebra ZD621 print labels directly from a SQL database?
Yes. LabelInn reads your Database data, binds the columns to fields on a label template sized for this printer, and drives the ZD621 over the connection you selected. You do not export an intermediate file per run.
Do I need a driver for the Zebra ZD621?
For the direct ZPL II path, no — LabelInn generates the command stream and sends it over the connection you selected.
KEEP GOING
Related pages
NEXT STEP / LABELINN
Print your Zebra ZD621 data on the printer you already own
This feature runs on Starter — $7.99/mo, or $79.90/year (pay for 10 months, use 12). Signing up starts a 14-day Pro trial, so you can bind your own Zebra ZD621 data and print a real label before you pay anything. · 14-day Pro trial on signup · No credit card required · Windows, macOS, Android, Web