# YugabyteDB YSQL

> SQL/schema on YSQL port 5433 with shard keys

**Subcategory:** YugabyteDB  
**License:** Apache-2.0  
**Source:** https://github.com/yugabyte/skills/blob/main/skills/ysql/SKILL.md

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## When it is useful

SQL/schema on YSQL (port 5433) — sharding, smart drivers, txn retries, PG migration.

## The Catch

Vendor lock to YB, not vanilla Postgres. Distinct from neon-postgres (HASH shard keys, 5433 not 5432, no Neon branches). False-fires on generic CREATE TABLE. OSS self-host Apache-2.0 $0. Aeon Sandbox Free: 1 node / <=2 vCPU / 4 GB RAM / 10 GB / 15 connections; paused after 10 days inactivity, deleted after 15. Do not reprint Aeon Dedicated $/vCPU.