PostgreSQLdata extraction

Extract Date Parts from Text in PostgreSQL with Regex

Use PostgreSQL regexp_matches to extract year, month, and day from date strings in text columns. SQL examples.

The Regex Pattern

Regex pattern

(\d{4})-(\d{2})-(\d{2})

Use this pattern with PostgreSQL's ~ operator.

PostgreSQL SQL Example

-- Extract individual date components from mixed-format date strings in a PostgreSQL column using regexp_matches
SELECT *
FROM your_table
WHERE your_column ~ '(\\d{4})-(\\d{2})-(\\d{2})';

How This Works

Extract individual date components from mixed-format date strings in a PostgreSQL column 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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