title: What does the information_schema database represent?
body: <p>I have one database in mysql.</p>
  
  <p>But when i log into phpMyAdmin , it shows another database called information_schema.</p>
  
  <p>Is that database always present with one database?</p>
  
  <p>I mean to say is there a copy of information_schema for every database present in mysql or is there one database called inforemation_schema per mysql server?</p>
  
  <p>If i modify this information_schema database how will that affect my current database?</p>