Topic on Talk:Quarry

why is this error showing up? execute command denied to user 's52788'@'%' for routine 'enwiki_p.DATE_TRUNC'

I am trying to get a query of monthly active contributors.

DATE_TRUNC is a standard function in Postgres, but it is not available in MySQL. You might want to try a web search for "mysql DATE_TRUNC" to see some possible alternatives.