title: [] brackets in sql statements
body: <p>What do the brackets do in a sql statement?</p>
  
  <p>For example, in the statement:  </p>
  
  <pre>insert into table1 ([columnname1], columnname2) values (val1, val2)</pre>
  
  <p>Also, what does it do if the table name is in brackets?</p>