Oracle Database Error Code ORA-908 Description :
missing NULL keyword
Error Cause:
Either of the following: In a CREATE TABLE or ALTER TABLE statement, NOT was entered to specify that no null values are allowed in that column, but the keyword NULL was omitted. In the IS [NOT] NULL logical operator, the keyword NULL was not found. For example, the following statement generates this message:SELECT * FROM EMP WHERE DEPTNO IS NOT; The keyword NULL must follow the keywords IS NOT.
How to Solve :
Correct the syntax.
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