PostgreSQLdata validation

Validate Postal Code in PostgreSQL Using Regex

Validate US and international postal codes in PostgreSQL using regex. SQL examples for postal code format checking in Postgres.

The Regex Pattern

Regex pattern

^(\d{5}(-\d{4})?|[A-Z]\d[A-Z] ?\d[A-Z]\d)$

Use this pattern with PostgreSQL's ~ operator.

PostgreSQL SQL Example

-- Validate postal code formats in a PostgreSQL addresses table for both US ZIP and Canadian postal codes using ~ operator
SELECT *
FROM your_table
WHERE your_column ~ '^(\\d{5}(-\\d{4})?|[A-Z]\\d[A-Z] ?\\d[A-Z]\\d)$';

How This Works

Validate postal code formats in a PostgreSQL addresses table for both US ZIP and Canadian postal codes using ~ operator. The regex pattern is used with PostgreSQL's ~ operator to filter rows at the database level.

Using regex directly in SQL is efficient for use cases like data validation — it avoids loading data into application memory just to filter it with a regex.

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