CDbCommand无法执行SQL语句：
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '''',AppraiseeMarks='',SupervisorMarks='' WHERE OprasTxnId =63183' at line 1.
执行的SQL语句为：
UPDATE Oprastxn SET ProgressMade=''',AppraiseeMarks='',SupervisorMarks='' WHERE OprasTxnId =63183