SQL> select
2 empno,
3 ename
4 from emp
5* ;
EMPNO ENAME
________ _________
7839 KING
7698 BLAKE
7782 CLARK
7566 JONES
7788 SCOTT
7902 FORD
7369 SMITH
7499 ALLEN
7521 WARD
7654 MARTIN
7844 TURNER
7876 ADAMS
7900 JAMES
7934 MILLER
14 rows selected.
select
2 empno,
3 ename
4
5 from emp
6* ;
Error starting at line : 1 in command -
select
empno,
ename
Error at Command Line : 3 Column : 1
Error report -
SQL Error: ORA-00904: "ENAME": invalid identifier
https://docs.oracle.com/error-help/db/ora-00904/00904. 00000 - "%s: invalid identifier"
*Cause: The identifier or column name entered was invalid.
*Action: Ensure the following
More Details :
https://docs.oracle.com/error-help/db/ora-00904/
Error starting at line : 1 in command -
from emp
Error report -
Unknown Command
1 select
2 empno,
3* ename
Oracle SQLDeveloper Command-Line (SQLcl) version: 25.2.2.0 build: 25.2.2.199.0918
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Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.9.0.25.07
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openjdk version "21.0.8" 2025-07-15
OpenJDK Runtime Environment (build 21.0.8+9-Ubuntu-0ubuntu124.04.1)
OpenJDK 64-Bit Server VM (build 21.0.8+9-Ubuntu-0ubuntu124.04.1, mixed mode, sharing)