title: MySQL Select last month data by current_timestamp
body: <p>till today when i was working with MySQL and needed to perform actions with date/time i was using int column with unix timestamp and there was no problems, but today after reading some guides i decided to test timestamp column with "current_timestamp" by default.</p>
  
  <p>So i am interested how to select last month data by column where info is in "2012-09-07 00:23:30" format? And maybe there some tricky queries what will give me data from the start of this month (not last 30 days, but from 09-01 00:00:00 till today) ?</p>