Web Reference: Feb 26, 2026 · PostgreSQL allows a table of no columns to be created (for example, CREATE TABLE foo();). This is an extension from the SQL standard, which does not allow zero-column tables. To create a new database table using the SQL Shell, make sure you are connected to the database. If not, follow the steps in the Get Started chapter of this tutorial. Jun 27, 2025 · From altering structures to managing constraints, this guide walks you through every step, plus common pitfalls like duplicate keys and out-of-sync sequences.
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