Title :
ORA-00911 invalid character
Cause :
Special characters are valid only in certain places. If special characters other than $, _, and # are used in a name and the name is not enclosed in double quotation marks (”), this message will be issued. One exception to this rule is for database names; in this case, double quotes are stripped out and ignored.
Action :
Remove the invalid character from the statement or enclose the object name in double quotation marks.