MySQLdata validation

Validate US ZIP Code Format in MySQL with REGEXP

Use MySQL REGEXP to validate 5-digit and ZIP+4 US postal codes. SQL query examples for ZIP code format validation.

The Regex Pattern

Regex pattern

^\d{5}(-\d{4})?$

Use this pattern with MySQL's REGEXP operator.

MySQL SQL Example

-- Filter an addresses table in MySQL to find rows where zip_code column matches valid US ZIP code format
SELECT *
FROM your_table
WHERE your_column REGEXP '^\\d{5}(-\\d{4})?$';

How This Works

Filter an addresses table in MySQL to find rows where zip_code column matches valid US ZIP code format. The regex pattern is used with MySQL's REGEXP 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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