How to CREATE TABLE ParadeDB in PostgreSQL

How do I create the ParadeDB table in PostgreSQL?

CREATE TABLE ParadeDB defines a new relational table named ParadeDB with chosen columns, data types, constraints, defaults, and storage settings.

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Description

Example H2

Example H3

What does CREATE TABLE ParadeDB do?

CREATE TABLE ParadeDB instructs PostgreSQL to allocate disk space and metadata for a brand-new table called ParadeDB. You specify each column’s data type, default values, constraints, and optional storage parameters so the database knows how to store and validate future rows.

When should I use IF NOT EXISTS?

Use IF NOT EXISTS when deployment scripts might run more than once. It prevents a fatal error if ParadeDB already exists, allowing migrations to stay idempotent and CI pipelines to keep running.

How do I add primary and foreign keys at creation time?

Declare PRIMARY KEY, UNIQUE, and REFERENCES clauses directly after each column or in a separate table-level constraint block. This keeps data consistent from the first insert.

Which storage options can I tweak?

Append TEMPORARY or UNLOGGED for short-lived or bulk-load scenarios. Specify TABLESPACE to put ParadeDB on a dedicated volume for faster I/O or quota isolation.

Example: create ParadeDB for order summaries

The snippet below creates a table that stores parade-style daily order facts while enforcing referential integrity with the existing Orders table.

CREATE TABLE IF NOT EXISTS ParadeDB ( parade_id SERIAL PRIMARY KEY, order_id INT REFERENCES Orders(id) ON DELETE CASCADE, parade_date DATE NOT NULL DEFAULT CURRENT_DATE, total_amount NUMERIC(12,2) NOT NULL, created_at TIMESTAMPTZ DEFAULT NOW() );

Best practices for CREATE TABLE ParadeDB

Prefix surrogate keys with the table name (parade_id) for clarity.
Use NOT NULL on all mandatory fields to avoid accidental NULL inserts.
Add CHECK constraints—e.g., CHECK(total_amount >= 0)—early to prevent bad data.
Document every column with COMMENT ON COLUMN right after creation.

What are common mistakes?

Forgeting PRIMARY KEY allows duplicate rows—use SERIAL PRIMARY KEY or GENERATED identity columns. Running the statement twice without IF NOT EXISTS raises ERROR: relation "paradedb" already exists.

Quick tips to verify your new table

Run \d+ ParadeDB in psql or query information_schema.columns to confirm column order, types, and defaults. Insert a sample row and select it back to ensure constraints behave as intended.

FAQ: Does CREATE TABLE lock the database?

The command takes only a metadata lock on the new table, not on existing ones, so concurrent activity proceeds unaffected.

FAQ: Can I add columns later?

Yes—use ALTER TABLE ParadeDB ADD COLUMN. However, designing the full schema up front avoids later data backfills.

Why How to CREATE TABLE ParadeDB in PostgreSQL is important

How to CREATE TABLE ParadeDB in PostgreSQL Example Usage


-- Create ParadeDB to aggregate daily order totals per customer
CREATE TABLE IF NOT EXISTS ParadeDB (
    parade_date   DATE         NOT NULL,
    customer_id   INT          REFERENCES Customers(id),
    total_orders  INT          NOT NULL,
    total_amount  NUMERIC(12,2) NOT NULL,
    PRIMARY KEY (parade_date, customer_id)
);

-- Populate ParadeDB for yesterday
INSERT INTO ParadeDB (parade_date, customer_id, total_orders, total_amount)
SELECT o.order_date, o.customer_id, COUNT(*), SUM(o.total_amount)
FROM Orders o
WHERE o.order_date = CURRENT_DATE - INTERVAL '1 day'
GROUP BY o.order_date, o.customer_id;

How to CREATE TABLE ParadeDB in PostgreSQL Syntax


CREATE [TEMPORARY | UNLOGGED] TABLE [IF NOT EXISTS] ParadeDB (
    column_name data_type [COLLATE collation] [column_constraint...],
    table_constraint...
) [TABLESPACE tablespace_name];

-- Ecommerce example with constraints
CREATE TABLE ParadeDB (
    parade_id      SERIAL PRIMARY KEY,
    order_id       INT NOT NULL REFERENCES Orders(id),
    order_date     DATE        NOT NULL,
    customer_id    INT         REFERENCES Customers(id),
    total_amount   NUMERIC(12,2) CHECK (total_amount >= 0),
    created_at     TIMESTAMPTZ DEFAULT NOW()
) TABLESPACE fastspace;

Common Mistakes

Omitting IF NOT EXISTS. Running deployment scripts twice without this clause throws “relation already exists.” Fix: prepend IF NOT EXISTS to make the statement idempotent.
Forgetting a PRIMARY KEY. Without it you risk duplicate rows and slow joins. Fix: declare a SERIAL or IDENTITY column as PRIMARY KEY at creation time.