Extract all features without a name tag:

name!=*

Extract all features that has a name tag

name=*

Extract all name tags which contains a particular set of words in the name

name:ram

name~ram

Extract all name tags which does not contain a particular set of words in the name

name!~ram

Edits by a user

user:osmusername

Combine two queries

#### Extract all features with name tag but without the word View in the name

name=* && name!~View

All buildings touched by a user in the last one month

user:osmusername && newer:1month && building

user:osmusername && newer:”2016-01-28T19:01:00Z” && building