PostgreSQL uses these rules for tables: - SERIAL handles IDs automatically. - DEFAULT fills in missing values. - NOT NULL makes a field required. - UNIQUE prevents duplicate values. You use four main ...

Works everywhere—browsers, mobile, servers. 𝐁𝐮𝐢𝐥𝐭 𝐟𝐨𝐫 𝐬𝐜𝐚𝐥𝐞: • Pluggable database adapters (MongoDB, PostgreSQL) • Express-based sync server • ACID transactions with row-level locking • ...