MySQLdata extraction

Extract Username Part from Email in MySQL with Regex

Extract the username portion before @ from email addresses stored in MySQL. SQL examples using REGEXP_SUBSTR.

The Regex Pattern

Regex pattern

^([a-zA-Z0-9._%+\-]+)@

Use this pattern with MySQL's REGEXP operator.

MySQL SQL Example

-- Extract the local part before @ from email addresses in a MySQL users table for username generation or analysis
SELECT *
FROM your_table
WHERE your_column REGEXP '^([a-zA-Z0-9._%+\\-]+)@';

How This Works

Extract the local part before @ from email addresses in a MySQL users table for username generation or analysis. 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 extraction — it avoids loading data into application memory just to filter it with a regex.

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