ORA-00911 invalid character error Solution

When PL/SQL is compiled, the following error occurs: ora -- 00911, incalid character. This error is caused by a problem with the SQL statement and is not identified during SQL check. However, you should note that this error is often caused by the difference between the full and half-width symbols. Check the comma (,) in the error source carefully. Press the button at the bottom of esc. This symbol is very small and is not easy to find. This error is caused by this symbol.

Please remember not to trust yourself in writing this ORA-xxx error in the future. Be sure to take the statement to the library for inspection.