Regex - convert from camel case notation to underscore

To convert from camel case to underscore notation we can use below regex.

Regex:
([a-z])([A-Z0-9])

Replace with:
\L$1_$2

// BEFORE:
dbColumnName

// AFTER:
db_column_name

Tested with notepad++.

Notes:

• ensure to have 'Match case' radio button checked,
• ensure to have 'Regular expression' radio button checked.

Motivation:
     Why I like to use it?
     Because I don't need to convert SQL field names manually and it saves my time.

Screenshots

Screenshot before:

Screenshot after:

More complex example

// BEFORE:
pictureId
pictureHashId
pictureFilename
userId
pictureUploadTime

// AFTER:
picture_id
picture_hash_id
picture_filename
user_id
picture_upload_time

See also

1. Regex - convert from underscore to camel case notation