- 11 Nov, 2021
- 0 Comments
- 1 Min Read
ORA-00911: invalid character
ORA-00911: invalid character
Cause: identifiers may not start with any ASCII character other than letters and numbers. $#_ are also allowed after the first character. Identifiers enclosed by doublequotes may contain any character other than a doublequote. Alternative quotes (q'#...#') cannot use spaces, tabs, or carriage returns as delimiters. For all other contexts, consult the SQL Language Reference Manual.
Action: None
ORA-00911 exception is very common and usually occurs for common syntax mistakes. ORA-00911 occurs usually when a programmer makes one of the following mistakes
1. when a special character is added in an SQL statement with column name
SQL> select ename# from scott.emp;
select ename# from scott.emp
*
ERROR at line 1:
ORA-00904: "ENAME#": invalid identifier
2. when some non-printable/special character added because of paste of sql statement from other editer (usually Acute` instead of quote')
SQL> select * from scott.emp where ename like `A%`;
select * from scott.emp where ename like `A%`
*
ERROR at line 1:
ORA-00911: invalid character
3. when string is not enclosed by single quotes in where clause condition
SQL> select * from emp where ename like A%;
select * from emp where ename like A%
*
ERROR at line 1:
ORA-00911: invalid character
4. when a extra semicolon (;) is added to end the query
SQL> select empno from emp;;
select empno from emp;
*
ERROR at line 1:
ORA-00911: invalid character
5. when semicolon (;) is added to end the query in execute immediate of pl/sql
SQL> begin 2 execute immediate 'update scott.emp set sal = sal * 1.1 where deptno=10;'; 3 commit; 4 end; 5 / begin * ERROR at line 1: ORA-00911: invalid character ORA-06512: at line 2
