This SQL works for encrypting existing data on some encryption types. SHA1 for sure I think HASH also. Doesn't work for the RIJNDAEL though.
UPDATE table_name SET column_name = ENCRYPTIONTYPE(column_name)
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.