title: How to calculate the hash of a row in SQL Anywhere 11 database table?
body: <p>My application is continuously polling the database. For optimization purpose, I want the application to query the database only if the tables have been modified. So I want to calculate the HASH of entire table and compare it with the <em>last-saved-hash</em> of table. (I plan to compute the hash by first calculating HASH of each row and then followed by their hash i.e. HASH of HASHes) </p>
  
  <p>I found that there is Checksum() sql utility function for SQL Server which computes HASH/Checksum for one row.</p>
  
  <p>Is there any similar utility/query to find the HASH of a row in SQL Anywhere 11 database?</p>
  
  <p>FYI, the database table <strong>does not</strong> have any coloumn with the precomputed HASH/Checksum.</p>