title: special character in sql for h2 database
body: <p>I use the query below:</p>
  
  <pre><code>update ACCOUNT_EXTERNAL_IDS 
     set EXTERNAL_ID = 'username:vietnt' 
   where ACCOUNT_ID='1000000' 
     and EMAIL_ADDRESS='NULL'
  </code></pre>
  
  <p>It shows the error:</p>
  
  <pre><code>ERROR: Column "USERNAME" not found; SQL statement:
  update ACCOUNT_EXTERNAL_IDS set EXTERNAL_ID=username:vietnt where ACCOUNT_ID=1000000 and EMAIL_ADDRESS=NULL [42122-147]
  </code></pre>
  
  <p>I use back slash \, then, the query become:</p>
  
  <pre><code>update ACCOUNT_EXTERNAL_IDS 
     set EXTERNAL_ID = 'username\:vietnt' 
   where ACCOUNT_ID = '1000000' 
     and EMAIL_ADDRESS='NULL'
  </code></pre>
  
  <p>The error is the same.</p>