PostgreSQLdata extraction

Extract File Extension from Path in PostgreSQL with Regex

Use PostgreSQL regexp_matches to extract file extensions from file path columns. SQL examples for file type analysis.

The Regex Pattern

Regex pattern

\.[a-zA-Z0-9]{2,5}$

Use this pattern with PostgreSQL's ~ operator.

PostgreSQL SQL Example

-- Extract file extensions from file_path column values in a PostgreSQL documents or assets table using regexp_matches
SELECT *
FROM your_table
WHERE your_column ~ '\\.[a-zA-Z0-9]{2,5}$';

How This Works

Extract file extensions from file_path column values in a PostgreSQL documents or assets table using regexp_matches. 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 extraction — it avoids loading data into application memory just to filter it with a regex.

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